{"id":73081,"date":"2025-12-30T18:45:22","date_gmt":"2025-12-30T18:45:22","guid":{"rendered":"https:\/\/discover.restek.com\/?p=73081"},"modified":"2026-01-07T21:16:16","modified_gmt":"2026-01-07T21:16:16","slug":"optimized-lc-msms-methods-for-bisphenols-in-drinking-water","status":"publish","type":"post","link":"https:\/\/discover.restek.com\/application-notes-zh\/evan5394\/optimized-lc-msms-methods-for-bisphenols-in-drinking-water","title":{"rendered":"Optimized LC-MS\/MS Methods for Bisphenols in Drinking Water"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">Key Highlights<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Two fast, simple, direct injection methods provide baseline resolution and accurate quantitative results for bisphenols in drinking water.<\/li>\n\n\n\n<li>Targeted method for BPA, BPS, and BPB complies with the EU directive sensitivity requirement (LLOQ of 2.5 ug\/L).<\/li>\n\n\n\n<li>Comprehensive method for 15 bisphenols supports labs wanting to expand analyte lists in anticipation of regulatory changes.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Abstract<\/h2>\n\n\n\n<p>Bisphenols are synthetic chemicals commonly used in the production of polycarbonate plastics and epoxy resins, making them widespread environmental contaminants. Their structural similarity to estrogen allows them to act as endocrine disruptors, raising concerns about their presence in drinking water. While BPA-free products often use substitutes like BPS and BPB, these alternatives can also potentially pose health risks. This study presents a rapid, reliable method for detecting BPA, BPS, and BPB in drinking water that complies with EU regulations. A secondary method expands detection to 15 bisphenol compounds, offering a practical approach for laboratories conducting comprehensive drinking water contamination testing.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Introduction<\/h2>\n\n\n\n<p>Bisphenols are a type of man-made chemical that can be found in food and the environment as contaminants. These synthetic phenols are primarily used in the production of polycarbonate plastics and epoxy resins. Due to the ubiquitous manufacture and use of these compounds worldwide, bisphenol contaminants are likely to be found in the environment and in drinking water. In 2011, a National Institutes of Health (NIH) study published their findings that 91% of the 427 people in their study tested positive for bisphenol A in their urine samples [1]. Bisphenols share a general structure consisting of two phenol groups connected by a bridging group. This structural similarity to estrogen allows them to mimic and interfere with natural hormone functions, classifying them as endocrine disruptors [2]. Bisphenols A, B, and S are some of the compounds that have been linked to human health effects. This is especially true for bisphenol A, and regulatory authorities are moving to restrict or ban bisphenols in food contact materials and children\u2019s toys.<\/p>\n\n\n\n<p>Although regulations exist in some regions of the world, bisphenols and their derivatives are used in high volumes and across a wide variety of goods, which increases the likelihood of them being introduced into water supplies through environmental avenues. Bisphenol S has been used as a replacement for bisphenol A in \u201cBPA-free\u201d products, but it also carries health concerns and has been identified as a reproductive toxicant in California\u2019s Proposition 65 [3]. Bisphenol B is used as an alternative to both A and S in consumer goods, but there are also concerns over its endocrine-disrupting capabilities [4].<sup> &nbsp;<\/sup>The European Union (EU) Drinking Water Directive has introduced bisphenol A as a parameter and, by January of 2026, water suppliers must ensure that bisphenol A levels do not exceed the parametric limit of 2.5 \u00b5g\/L in drinking water [5].<\/p>\n\n\n\n<p>In this work, two direct injection LC-MS\/MS methods for bisphenols in drinking water were established. A rapid and reliable method was developed for bisphenols A, B, and S because they are the most frequently analyzed bisphenols. This method satisfies the EU\u2019s Drinking Water Directive and was evaluated for accuracy and precision using fortified water samples. In addition, a secondary, comprehensive method was developed to include a total of 15 bisphenol compounds, offering a proactive approach to anticipated regulatory changes. The methods presented here provide a quick and easy solution for drinking water analysis for bisphenols for labs interested in implementing or expanding contamination testing.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Experimental<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">LC-MS\/MS Method for Bisphenols A, B, S<\/h3>\n\n\n\n<p>The chromatographic conditions are shown in Table I, and the transitions and internal standards are provided in Table II.<\/p>\n\n\n\n<p><strong>Table I:<\/strong> Analytical Conditions for Bisphenols A, B, and S<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td>\n\t\t\t\tColumn\n\t\t\t<\/td><td class=\"has-text-align-left\" data-align=\"left\" colspan=\"2\">\n\t\t\t\tRaptor Biphenyl 50 x 3.0 mm, 2.7 \u00b5m (cat.# 9309A5E)\n\t\t\t<\/td><\/tr><tr><td>\n\t\t\t\tGuard column\n\t\t\t<\/td><td class=\"has-text-align-left\" data-align=\"left\" colspan=\"2\">\n\t\t\t\tRaptor Biphenyl EXP guard column cartridge 5 x 3.0 mm, 2.7 \u00b5m (cat.# 9309A0253)\n\t\t\t<\/td><\/tr><tr><td>\n\t\t\t\tColumn temperature\n\t\t\t<\/td><td class=\"has-text-align-left\" data-align=\"left\" colspan=\"2\">\n\t\t\t\t30 \u00b0C\n\t\t\t<\/td><\/tr><tr><td>\n\t\t\t\tInjection volume\n\t\t\t<\/td><td class=\"has-text-align-left\" data-align=\"left\" colspan=\"2\">\n\t\t\t\t10 \u00b5L\n\t\t\t<\/td><\/tr><tr><td>\n\t\t\t\tMobile phase A\n\t\t\t<\/td><td class=\"has-text-align-left\" data-align=\"left\" colspan=\"2\">\n\t\t\t\tWater\n\t\t\t<\/td><\/tr><tr><td>\n\t\t\t\tMobile phase B\n\t\t\t<\/td><td class=\"has-text-align-left\" data-align=\"left\" colspan=\"2\">\n\t\t\t\tMethanol\n\t\t\t<\/td><\/tr><tr><td>\n\t\t\t\tFlow rate\n\t\t\t<\/td><td class=\"has-text-align-left\" data-align=\"left\" colspan=\"2\">\n\t\t\t\t0.8 mL\/min\n\t\t\t<\/td><\/tr><tr><td>\n\t\t\t\tDetection\n\t\t\t<\/td><td class=\"has-text-align-left\" data-align=\"left\" colspan=\"2\">\n\t\t\t\tESI (-) MS\/MS\n\t\t\t<\/td><\/tr><tr><td>\n\t\t\t\tGradient\n\t\t\t<\/td><td class=\"has-text-align-left\" data-align=\"left\">\n\t\t\t\tTime (min)\n\t\t\t<\/td><td class=\"has-text-align-left\" data-align=\"left\">\n\t\t\t\t%B\n\t\t\t<\/td><\/tr><tr><td><\/td><td class=\"has-text-align-left\" data-align=\"left\">\n\t\t\t\t0.00\n\t\t\t<\/td><td class=\"has-text-align-left\" data-align=\"left\">\n\t\t\t\t40\n\t\t\t<\/td><\/tr><tr><td><\/td><td class=\"has-text-align-left\" data-align=\"left\">\n\t\t\t\t0.50\n\t\t\t<\/td><td class=\"has-text-align-left\" data-align=\"left\">\n\t\t\t\t40\n\t\t\t<\/td><\/tr><tr><td><\/td><td class=\"has-text-align-left\" data-align=\"left\">\n\t\t\t\t3.50\n\t\t\t<\/td><td class=\"has-text-align-left\" data-align=\"left\">\n\t\t\t\t85\n\t\t\t<\/td><\/tr><tr><td><\/td><td class=\"has-text-align-left\" data-align=\"left\">\n\t\t\t\t3.51\n\t\t\t<\/td><td class=\"has-text-align-left\" data-align=\"left\">\n\t\t\t\t40\n\t\t\t<\/td><\/tr><tr><td><\/td><td class=\"has-text-align-left\" data-align=\"left\">\n\t\t\t\t5.00\n\t\t\t<\/td><td class=\"has-text-align-left\" data-align=\"left\">\n\t\t\t\t40\n\t\t\t<\/td><\/tr><tr><td>\n\t\t\t\tValve position to waste\n\t\t\t<\/td><td class=\"has-text-align-left\" data-align=\"left\">\n\t\t\t\t0.00\n\t\t\t<\/td><td class=\"has-text-align-left\" data-align=\"left\">\n\t\t\t\t&#8211;\n\t\t\t<\/td><\/tr><tr><td>\n\t\t\t\tValve position to MS\n\t\t\t<\/td><td class=\"has-text-align-left\" data-align=\"left\">\n\t\t\t\t0.80\n\t\t\t<\/td><td class=\"has-text-align-left\" data-align=\"left\">\n\t\t\t\t&#8211;\n\t\t\t<\/td><\/tr><tr><td>\n\t\t\t\tValve position to waste\n\t\t\t<\/td><td class=\"has-text-align-left\" data-align=\"left\">\n\t\t\t\t3.51\n\t\t\t<\/td><td class=\"has-text-align-left\" data-align=\"left\">\n\t\t\t\t&#8211;\n\t\t\t<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>&nbsp;<strong>Table II:<\/strong> Analyte MS Transitions for Bisphenols A, B, and S in Water Samples<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><th>\n\t\t\t\tAnalyte\n\t\t\t<\/th><th class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\tPrecursor\n\t\t\t<\/th><th class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\tProduct 1\n\t\t\t<\/th><th class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\tProduct 2\n\t\t\t<\/th><th class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\tInternal Standard\n\t\t\t<\/th><\/tr><tr><td>\n\t\t\t\tBisphenol S\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t249.00\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t108.15\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t92.10\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t1\n\t\t\t<\/td><\/tr><tr><td>\n\t\t\t\tBisphenol A\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t227.00\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t212.05\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t133.25\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2\n\t\t\t<\/td><\/tr><tr><td>\n\t\t\t\tBisphenol B\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t241.00\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t212.05\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t211.10\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2\n\t\t\t<\/td><\/tr><tr><td>\n\t\t\t\tBisphenol A-d16\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t241.00\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t223.25\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t&#8211;\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2\n\t\t\t<\/td><\/tr><tr><td>\n\t\t\t\tBisphenol S-d8\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t257.00\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t112.20\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t&#8211;\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t1\n\t\t\t<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Comprehensive LC-MS\/MS Method for Bisphenols<\/h3>\n\n\n\n<p>The chromatographic conditions are shown in Table III, and the transitions and internal standards are provided in Table IV.<\/p>\n\n\n\n<p><strong>Table III:<\/strong> Analytical Conditions for 15 Bisphenols<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td>\n\t\t\t\tColumn\n\t\t\t<\/td><td colspan=\"2\">\n\t\t\t\tRaptor Biphenyl 50 x 3.0 mm, 2.7 \u00b5m (cat.# 9309A5E)\n\t\t\t<\/td><\/tr><tr><td>\n\t\t\t\tGuard column\n\t\t\t<\/td><td colspan=\"2\">\n\t\t\t\tRaptor Biphenyl EXP guard column cartridge 5 x 3.0 mm, 2.7 \u00b5m (cat.# 9309A0253)\n\t\t\t<\/td><\/tr><tr><td>\n\t\t\t\tColumn temperature\n\t\t\t<\/td><td colspan=\"2\">\n\t\t\t\t30 \u00b0C\n\t\t\t<\/td><\/tr><tr><td>\n\t\t\t\tInjection volume\n\t\t\t<\/td><td colspan=\"2\">\n\t\t\t\t10 \u00b5L\n\t\t\t<\/td><\/tr><tr><td>\n\t\t\t\tMobile phase A\n\t\t\t<\/td><td colspan=\"2\">\n\t\t\t\tWater\n\t\t\t<\/td><\/tr><tr><td>\n\t\t\t\tMobile phase B\n\t\t\t<\/td><td colspan=\"2\">\n\t\t\t\tMethanol\n\t\t\t<\/td><\/tr><tr><td>\n\t\t\t\tFlow rate\n\t\t\t<\/td><td colspan=\"2\">\n\t\t\t\t0.8 mL\/min\n\t\t\t<\/td><\/tr><tr><td>\n\t\t\t\tDetection\n\t\t\t<\/td><td colspan=\"2\">\n\t\t\t\tESI (-) MS\/MS\n\t\t\t<\/td><\/tr><tr><td>\n\t\t\t\tGradient\n\t\t\t<\/td><td>\n\t\t\t\tTime (min)\n\t\t\t<\/td><td>\n\t\t\t\t%B\n\t\t\t<\/td><\/tr><tr><td><\/td><td>\n\t\t\t\t0.00\n\t\t\t<\/td><td>\n\t\t\t\t40\n\t\t\t<\/td><\/tr><tr><td><\/td><td>\n\t\t\t\t1.00\n\t\t\t<\/td><td>\n\t\t\t\t40\n\t\t\t<\/td><\/tr><tr><td><\/td><td>\n\t\t\t\t6.50\n\t\t\t<\/td><td>\n\t\t\t\t85\n\t\t\t<\/td><\/tr><tr><td><\/td><td>\n\t\t\t\t7.00\n\t\t\t<\/td><td>\n\t\t\t\t85\n\t\t\t<\/td><\/tr><tr><td><\/td><td>\n\t\t\t\t7.01\n\t\t\t<\/td><td>\n\t\t\t\t40\n\t\t\t<\/td><\/tr><tr><td><\/td><td>\n\t\t\t\t8.50\n\t\t\t<\/td><td>\n\t\t\t\t40\n\t\t\t<\/td><\/tr><tr><td>\n\t\t\t\tValve position to waste\n\t\t\t<\/td><td>\n\t\t\t\t0.00\n\t\t\t<\/td><td>\n\t\t\t\t&#8211;\n\t\t\t<\/td><\/tr><tr><td>\n\t\t\t\tValve position to MS\n\t\t\t<\/td><td>\n\t\t\t\t1.00\n\t\t\t<\/td><td>\n\t\t\t\t&#8211;\n\t\t\t<\/td><\/tr><tr><td>\n\t\t\t\tValve position to waste\n\t\t\t<\/td><td>\n\t\t\t\t7.00\n\t\t\t<\/td><td>\n\t\t\t\t&#8211;\n\t\t\t<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><strong>Table IV:<\/strong> Analyte MS Transitions for 15 Bisphenols in Water Samples<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><th>\n\t\t\t\tAnalyte\n\t\t\t<\/th><th class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\tPrecursor\n\t\t\t<\/th><th class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\tProduct 1\n\t\t\t<\/th><th class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\tProduct 2\n\t\t\t<\/th><th class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\tInternal Standard\n\t\t\t<\/th><\/tr><tr><td>\n\t\t\t\tBisphenol S-d8\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t257.00\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t112.20\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t&#8211;\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t1\n\t\t\t<\/td><\/tr><tr><td>\n\t\t\t\tBisphenol S\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t249.00\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t108.15\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t92.10\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t1\n\t\t\t<\/td><\/tr><tr><td>\n\t\t\t\tBisphenol F\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t199.00\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t93.10\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t104.85\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2\n\t\t\t<\/td><\/tr><tr><td>\n\t\t\t\tBisphenol E\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t213.00\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t197.10\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t119.05\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2\n\t\t\t<\/td><\/tr><tr><td>\n\t\t\t\tBisphenol A-d16\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t241.00\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t223.25\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t&#8211;\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2\n\t\t\t<\/td><\/tr><tr><td>\n\t\t\t\tBisphenol A\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t227.00\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t212.05\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t133.25\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2\n\t\t\t<\/td><\/tr><tr><td>\n\t\t\t\tBisphenol AF\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t335.00\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t265.05\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t177.20\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t3\n\t\t\t<\/td><\/tr><tr><td>\n\t\t\t\tBisphenol B\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t241.00\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t212.05\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t211.10\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2\n\t\t\t<\/td><\/tr><tr><td>\n\t\t\t\tBisphenol C\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t255.00\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t240.15\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t147.20\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2\n\t\t\t<\/td><\/tr><tr><td>\n\t\t\t\tBisphenol AP\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t289.00\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t274.15\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t273.15\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2\n\t\t\t<\/td><\/tr><tr><td>\n\t\t\t\tBisphenol Z\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t267.00\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t173.15\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t223.10\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2\n\t\t\t<\/td><\/tr><tr><td>\n\t\t\t\tBisphenol G\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t311.00\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t296.30\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t295.00\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t3\n\t\t\t<\/td><\/tr><tr><td>\n\t\t\t\tBisphenol FL\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t349.00\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t256.15\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t215.20\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2\n\t\t\t<\/td><\/tr><tr><td>\n\t\t\t\tBisphenol BP\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t351.00\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t274.15\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t273.15\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t3\n\t\t\t<\/td><\/tr><tr><td>\n\t\t\t\tBisphenol M\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t345.00\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t251.20\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t330.20\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t3\n\t\t\t<\/td><\/tr><tr><td>\n\t\t\t\tBisphenol P-13C4\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t349.00\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t333.20\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t&#8211;\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t3\n\t\t\t<\/td><\/tr><tr><td>\n\t\t\t\tBisphenol P\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t345.00\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t330.15\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t315.15\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t3\n\t\t\t<\/td><\/tr><tr><td>\n\t\t\t\tBisphenol PH\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t379.00\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t364.10\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t209.15\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t3\n\t\t\t<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Standard and Sample Preparation<\/h3>\n\n\n\n<p>Calibration standards for the LC-MS\/MS methods for bisphenols were prepared as follows at a range of 2.5-300 \u00b5g\/L. A 30 \u00b5L aliquot of 1 mg\/L isotopically labeled internal standard (IS) was mixed with 50 \u00b5L of working standard and 920 \u00b5L MS-grade water in amber vials (cat.# 21142). Five different sources of drinking water were collected locally. For accuracy and precision experiments, 1 mL water samples were fortified at 2.5 (LLOQ); 7.5 (LQC); and 75 (MQC) \u00b5g\/L. All samples were capped, vortexed, and 10 \u00b5L was injected into the LC-MS\/MS for analysis.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Results and Discussion<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Chromatographic Performance<\/h3>\n\n\n\n<p>The Raptor Biphenyl column, used under the chromatographic conditions established here, achieved full resolution for both the targeted BPA, BPB, and BPS method as well as the comprehensive 15-bisphenols method. Complete chromatographic separation is useful with MS detection because it mitigates ion suppression caused by coeluting analytes. It also allows these methods to be amenable to analysis with less expensive and nonspecific fluorescence detectors, which need baseline resolution to integrate each analyte accurately. Both LC-MS\/MS methods for bisphenols analysis used direct injection and had fast run times, making them ideal for high-throughput environments. The three-analyte bisphenols method has a total cycle time of just 5 minutes, and the comprehensive 15-analyte method has a cycle time of 8.5 minutes. In order to reduce both matrix effects and the amount of matrix reaching the MS, a diverter valve was used before and after compound elution to divert the eluent to waste. This step was implemented because it reduces downtime by allowing instruments to analyze more samples before maintenance is required.<strong><br><\/strong><\/p>\n\n\n<div class=\"wp-block-custom-chromatogram-article-top\"><div class=\"chromatogram-article-placeholder\"><div class=\"figure-heading\"><strong>Figure 1:<\/strong> Bisphenols A, B, and S Analyzed by LC-MS\/MS<\/div><div class='chromatogram-article-inner-full'><div class=\"chromatogram-article-inner\">\n<div class=\"wp-block-custom-chromatogram-article\"><div class=\"wp-block-custom-chromatogram-article\"><div class=\"chromatogram-image wide-image\"><img decoding=\"async\" src=\"https:\/\/ez.restek.com\/images\/cgram\/lc_ev0603.png\" alt=\"Bisphenol A, B, and S on Raptor Biphenyl by LC-MS\/MS\" title=\"-\"><\/div><p class=\"article-id\" style=\"text-align:center\"> LC_EV0603<\/p><div class=\"chromatogram-peaks\"><h4>Peaks<\/h4><table class=\"peaks col-12\">\n<thead><tr><th><\/th><th style=\"text-align: left;width: 75px\">Peaks<\/th><th style=\"text-align: center;width: 75px\">t<sub>R<\/sub> (min)<\/th><th style=\"text-align: center;width: 75px\">Conc.<br \/>(ng\/mL)<\/th><th style=\"text-align: center;width: 75px\">Precursor Ion<\/th><th style=\"text-align: center;width: 75px\">Product Ion 1<\/th><th style=\"text-align: center;width: 75px\">Product Ion 2<\/th><\/tr><\/thead>\n<tbody><tr><td class=\"num\">1.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Bisphenol S (BPS)\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/80-09-1\/Bisphenol S\" target=\"_blank\" rel=\"noopener\">Bisphenol S (BPS)<\/a><\/td><td class=\"oth\">1.57<\/td><td class=\"oth\">2.5<\/td><td class=\"oth\">249.0<\/td><td class=\"oth\">108.2<\/td><td class=\"oth\">92.1<\/td><\/tr>\n<tr><td class=\"num\">2.<\/td><td class=\"cmpd\">Bisphenol S-d8<\/td><td class=\"oth\">1.57<\/td><td class=\"oth\">30<\/td><td class=\"oth\">257.0<\/td><td class=\"oth\">112.2<\/td><td class=\"oth\">&#8211;<\/td><\/tr>\n<tr><td class=\"num\">3.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Bisphenol A (BPA)\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/80-05-7\/Bisphenol A\" target=\"_blank\" rel=\"noopener\">Bisphenol A (BPA)<\/a><\/td><td class=\"oth\">2.74<\/td><td class=\"oth\">2.5<\/td><td class=\"oth\">227.0<\/td><td class=\"oth\">212.1<\/td><td class=\"oth\">133.3<\/td><\/tr>\n<tr><td class=\"num\">4.<\/td><td class=\"cmpd\">Bisphenol A-d16<\/td><td class=\"oth\">2.77<\/td><td class=\"oth\">30<\/td><td class=\"oth\">241.0<\/td><td class=\"oth\">223.3<\/td><td class=\"oth\">&#8211;<\/td><\/tr>\n<tr><td class=\"num\">5.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Bisphenol B (BPB)\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/77-40-7\/Bisphenol B\" target=\"_blank\" rel=\"noopener\">Bisphenol B (BPB)<\/a><\/td><td class=\"oth\">3.06<\/td><td class=\"oth\">2.5<\/td><td class=\"oth\">241.0<\/td><td class=\"oth\">212.1<\/td><td class=\"oth\">211.1<\/td><\/tr>\n<\/tbody><\/table><\/div><div class=\"chromatogram-conditions\"><h4>Conditions<\/h4><div class=\"conditions-container container-fluid\"><div class=\"row\"><table class=\"conditions col-lg-6 col-12\"><tr><th class=\"conditions_header\" scope=\"row\">Column<\/th><td>Raptor Biphenyl  (<a target=\"_blank\" href=\"https:\/\/www.restek.com\/p\/9309A5E?utm_source=chromatograms&amp;utm_medium=link&amp;utm_campaign=LC_EV0603\" rel=\"noopener\">cat.# 9309A5E<\/a>)<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Dimensions:<\/th><td>50 mm x 3.0 mm ID<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Particle Size:<\/th><td>2.7 \u00b5m<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Pore Size:<\/th><td>90 \u00c5<\/td><\/tr><tr><td><\/td><tr><th class=\"sub conditions_header\" scope=\"row\">Guard Column:<\/th><td>Raptor Biphenyl EXP guard column cartridge 5 mm, 3.0 mm ID, 2.7 \u00b5m (<a target=\"_blank\" href=\"https:\/\/www.restek.com\/p\/9309A0253?utm_source=chromatograms&amp;utm_medium=link&amp;utm_campaign=LC_EV0603\" rel=\"noopener\">cat.# 9309A0253<\/a>)<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Temp.:<\/th><td>30 \u00b0C<\/td><\/tr><tr class=\"cgram_header_row\"><th class=\"conditions_header\" scope=\"row\">Standard\/Sample<\/th><td><\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Diluent:<\/th><td>Water<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Conc.:<\/th><td>2.5 ng\/mL<\/td><\/tr><td><\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Inj. Vol.:<\/th><td>10 \u00b5L <\/td><\/tr><tr class=\"cgram_header_row\"><th class=\"conditions_header\" scope=\"row\">Mobile Phase<\/th><td><\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">A:<\/th><td>Water <\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">B:<\/th><td>Methanol <\/td><\/tr><tr><td><\/td><td><table class=\"cgram_ramp\"><thead><tr><th>Time (min)<\/th><th>Flow (mL\/min)<\/th><th>%A<\/th><th>%B<\/th><\/tr><\/thead><tbody><tr><td>0.00<\/td><td>0.8<\/td><td>60<\/td><td>40<\/td><\/tr><tr><td>0.50<\/td><td>0.8<\/td><td>60<\/td><td>40<\/td><\/tr><tr><td>3.50<\/td><td>0.8<\/td><td>15<\/td><td>85<\/td><\/tr><tr><td>3.51<\/td><td>0.8<\/td><td>60<\/td><td>40<\/td><\/tr><tr><td>5.00<\/td><td>0.8<\/td><td>60<\/td><td>40<\/td><\/tr><\/tbody><\/table><\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Max Pressure:<\/th><td>330 bar<\/td><\/tr><\/table><table class=\"conditions col-lg-6 col-12\"><tr><th class=\"conditions_header\" scope=\"row\">Detector<\/th><td>Shimadzu 8060 MS\/MS<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Ion Source:<\/th><td>Electrospray <\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Ion Mode:<\/th><td>ESI- <\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Mode:<\/th><td>MRM <\/td><\/tr><tr class=\"cgram_header_row\"><th class=\"conditions_header\" scope=\"row\">Instrument<\/th><td>Shimadzu Nexera X2<\/td><\/tr><tr class=\"cgram_header_row\"><th class=\"conditions_header\" scope=\"row\">Sample Preparation<\/th><td>Water samples were aliquoted into an amber short-cap vial (<a target=\"_blank\" href=\"https:\/\/www.restek.com\/p\/21142?utm_source=chromatograms&amp;utm_medium=link&amp;utm_campaign=LC_EV0603\" rel=\"noopener\">cat.# 21142<\/a>) and fortified with analytes at 2.5 ng\/mL. The samples were then capped with a 9 mm short cap (<a target=\"_blank\" href=\"https:\/\/www.restek.com\/p\/24497?utm_source=chromatograms&amp;utm_medium=link&amp;utm_campaign=LC_EV0603\" rel=\"noopener\">cat.# 24497<\/a>) and vortexed ~30 seconds before being injection onto the LC-MS\/MS for analysis. <\/td><\/tr><tr class=\"cgram_header_row\"><th class=\"conditions_header\" scope=\"row\">Notes<\/th><td>The flow was directed to waste for the first 0.8 minutes of analysis and after 3.50 minutes to maintain cleanliness of the source. <\/td><\/tr><\/table><\/div><\/div><\/div><div class=\"chromatogram-pdf-link\"><a href=\"https:\/\/ez.restek.com\/images\/cgram\/lc_ev0603.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"18\" height=\"18\" viewBox=\"0 0 18 18\"><g data-name=\"Group 2996\"><path data-name=\"Rectangle 1246\" d=\"M0 0h18v18H0z\" style=\"fill: none;\"><\/path><\/g><g data-name=\"Group 2997\"><path data-name=\"Path 729\" d=\"M13.412 11.4v2.017H5.345V11.4H4v2.017a1.349 1.349 0 0 0 1.345 1.345h8.068a1.349 1.349 0 0 0 1.345-1.345V11.4zm-.672-2.694-.948-.948-1.741 1.735V4H8.706v5.493L6.965 7.758l-.948.948 3.361 3.361z\" transform=\"translate(-.437 -.414)\" style=\"fill: rgb(13, 123, 196);\"><\/path><\/g><\/svg>Download PDF<\/a><\/div><\/div><\/div>\n<\/div><\/div><\/div>\n\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n<div class=\"wp-block-custom-chromatogram-article-top\"><div class=\"chromatogram-article-placeholder\"><div class=\"figure-heading\"><strong>Figure 2:<\/strong> Comprehensive Method for 15 Bisphenols by LC-MS\/MS<\/div><div class='chromatogram-article-inner-full'><div class=\"chromatogram-article-inner\">\n<div class=\"wp-block-custom-chromatogram-article\"><div class=\"wp-block-custom-chromatogram-article\"><div class=\"chromatogram-image regular-image\"><img decoding=\"async\" src=\"https:\/\/ez.restek.com\/images\/cgram\/lc_ev0604.png\" alt=\"15 Bisphenols on Raptor Biphenyl by LC-MS\/MS\" title=\"-\"><\/div><p class=\"article-id\" style=\"text-align:center\"> LC_EV0604<\/p><div class=\"chromatogram-peaks\"><h4>Peaks<\/h4><table class=\"peaks col-12\">\n<thead><tr><th><\/th><th style=\"text-align: left;width: 75px\">Peaks<\/th><th style=\"text-align: center;width: 75px\">t<sub>R<\/sub> (min)<\/th><th style=\"text-align: center;width: 75px\">Conc.<br \/>(ng\/mL)<\/th><th style=\"text-align: center;width: 75px\">Precursor Ion<\/th><th style=\"text-align: center;width: 75px\">Product Ion 1<\/th><th style=\"text-align: center;width: 75px\">Product Ion 2<\/th><th style=\"text-align: center;width: 75px\">Internal Standard<\/th><\/tr><\/thead>\n<tbody><tr><td class=\"num\">1.<\/td><td class=\"cmpd\">Bisphenol S-d8<\/td><td class=\"oth\">1.65<\/td><td class=\"oth\">30<\/td><td class=\"oth\">257.0<\/td><td class=\"oth\">112.2<\/td><td class=\"oth\">&#8211;<\/td><td class=\"oth\">1<\/td><\/tr>\n<tr><td class=\"num\">2.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Bisphenol S (BPS)\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/80-09-1\/Bisphenol S\" target=\"_blank\" rel=\"noopener\">Bisphenol S (BPS)<\/a><\/td><td class=\"oth\">1.70<\/td><td class=\"oth\">2.5<\/td><td class=\"oth\">249.0<\/td><td class=\"oth\">108.1<\/td><td class=\"oth\">92.1<\/td><td class=\"oth\">1<\/td><\/tr>\n<tr><td class=\"num\">3.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Bisphenol F (BPF)\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/2467-02-9\/Bisphenol F\" target=\"_blank\" rel=\"noopener\">Bisphenol F (BPF)<\/a><\/td><td class=\"oth\">3.06<\/td><td class=\"oth\">2.5<\/td><td class=\"oth\">199.0<\/td><td class=\"oth\">93.1<\/td><td class=\"oth\">104.9<\/td><td class=\"oth\">2<\/td><\/tr>\n<tr><td class=\"num\">4.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Bisphenol E (BPE)\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/2081-08-5\/Bisphenol E\" target=\"_blank\" rel=\"noopener\">Bisphenol E (BPE)<\/a><\/td><td class=\"oth\">3.59<\/td><td class=\"oth\">2.5<\/td><td class=\"oth\">213.0<\/td><td class=\"oth\">197.1<\/td><td class=\"oth\">119.1<\/td><td class=\"oth\">2<\/td><\/tr>\n<tr><td class=\"num\">5.<\/td><td class=\"cmpd\">Bisphenol A-d16<\/td><td class=\"oth\">3.95<\/td><td class=\"oth\">30<\/td><td class=\"oth\">241.0<\/td><td class=\"oth\">223.3<\/td><td class=\"oth\">&#8211;<\/td><td class=\"oth\">2<\/td><\/tr>\n<tr><td class=\"num\">6.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Bisphenol A (BPA)\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/80-05-7\/Bisphenol A\" target=\"_blank\" rel=\"noopener\">Bisphenol A (BPA)<\/a><\/td><td class=\"oth\">4.02<\/td><td class=\"oth\">2.5<\/td><td class=\"oth\">227.0<\/td><td class=\"oth\">212.1<\/td><td class=\"oth\">133.3<\/td><td class=\"oth\">2<\/td><\/tr>\n<tr><td class=\"num\">7.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Bisphenol AF (BPAF)\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/1478-61-1\/Bisphenol AF\" target=\"_blank\" rel=\"noopener\">Bisphenol AF (BPAF)<\/a><\/td><td class=\"oth\">4.25<\/td><td class=\"oth\">2.5<\/td><td class=\"oth\">335.0<\/td><td class=\"oth\">265.1<\/td><td class=\"oth\">177.2<\/td><td class=\"oth\">3<\/td><\/tr>\n<tr><td class=\"num\">8.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Bisphenol B (BPB)\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/77-40-7\/Bisphenol B\" target=\"_blank\" rel=\"noopener\">Bisphenol B (BPB)<\/a><\/td><td class=\"oth\">4.59<\/td><td class=\"oth\">2.5<\/td><td class=\"oth\">241.0<\/td><td class=\"oth\">212.1<\/td><td class=\"oth\">211.1<\/td><td class=\"oth\">2<\/td><\/tr>\n<tr><td class=\"num\">9.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Bisphenol C (BPC)\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/79-97-0\/Bisphenol C\" target=\"_blank\" rel=\"noopener\">Bisphenol C (BPC)<\/a><\/td><td class=\"oth\">4.85<\/td><td class=\"oth\">2.5<\/td><td class=\"oth\">255.0<\/td><td class=\"oth\">240.2<\/td><td class=\"oth\">147.2<\/td><td class=\"oth\">2<\/td><\/tr>\n<tr><td class=\"num\">10.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Bisphenol AP (BPAP)\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/1571-75-1\/Bisphenol AP\" target=\"_blank\" rel=\"noopener\">Bisphenol AP (BPAP)<\/a><\/td><td class=\"oth\">5.28<\/td><td class=\"oth\">2.5<\/td><td class=\"oth\">289.0<\/td><td class=\"oth\">274.2<\/td><td class=\"oth\">273.2<\/td><td class=\"oth\">2<\/td><\/tr>\n<tr><td class=\"num\">11.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Bisphenol Z (BPZ)\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/843-55-0\/Bisphenol Z\" target=\"_blank\" rel=\"noopener\">Bisphenol Z (BPZ)<\/a><\/td><td class=\"oth\">5.48<\/td><td class=\"oth\">2.5<\/td><td class=\"oth\">267.0<\/td><td class=\"oth\">173.2<\/td><td class=\"oth\">223.1<\/td><td class=\"oth\">2<\/td><\/tr>\n<tr><td class=\"num\">12.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Bisphenol G (BPG)\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/127-54-8\/Bisphenol G\" target=\"_blank\" rel=\"noopener\">Bisphenol G (BPG)<\/a><\/td><td class=\"oth\">5.84<\/td><td class=\"oth\">2.5<\/td><td class=\"oth\">311.0<\/td><td class=\"oth\">296.3<\/td><td class=\"oth\">295.0<\/td><td class=\"oth\">3<\/td><\/tr>\n<tr><td class=\"num\">13.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Bisphenol FL (BPFL)\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/3236-71-3\/Bisphenol FL\" target=\"_blank\" rel=\"noopener\">Bisphenol FL (BPFL)<\/a><\/td><td class=\"oth\">5.99<\/td><td class=\"oth\">2.5<\/td><td class=\"oth\">349.0<\/td><td class=\"oth\">256.2<\/td><td class=\"oth\">215.2<\/td><td class=\"oth\">2<\/td><\/tr>\n<tr><td class=\"num\">14.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Bisphenol BP (BPBP)\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/1844-01-5\/Bisphenol BP\" target=\"_blank\" rel=\"noopener\">Bisphenol BP (BPBP)<\/a><\/td><td class=\"oth\">6.15<\/td><td class=\"oth\">2.5<\/td><td class=\"oth\">351.0<\/td><td class=\"oth\">274.2<\/td><td class=\"oth\">273.2<\/td><td class=\"oth\">3<\/td><\/tr>\n<tr><td class=\"num\">15.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Bisphenol M (BPM)\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/13595-25-0\/Bisphenol M\" target=\"_blank\" rel=\"noopener\">Bisphenol M (BPM)<\/a><\/td><td class=\"oth\">6.34<\/td><td class=\"oth\">2.5<\/td><td class=\"oth\">345.0<\/td><td class=\"oth\">251.2<\/td><td class=\"oth\">330.2<\/td><td class=\"oth\">3<\/td><\/tr>\n<tr><td class=\"num\">16.<\/td><td class=\"cmpd\">Bisphenol P-13C4<\/td><td class=\"oth\">6.50<\/td><td class=\"oth\">30<\/td><td class=\"oth\">349.0<\/td><td class=\"oth\">333.2<\/td><td class=\"oth\">&#8211;<\/td><td class=\"oth\">3<\/td><\/tr>\n<tr><td class=\"num\">17.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Bisphenol P (BPP)\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/2167-51-3\/Bisphenol P\" target=\"_blank\" rel=\"noopener\">Bisphenol P (BPP)<\/a><\/td><td class=\"oth\">6.55<\/td><td class=\"oth\">2.5<\/td><td class=\"oth\">345.0<\/td><td class=\"oth\">330.2<\/td><td class=\"oth\">315.2<\/td><td class=\"oth\">3<\/td><\/tr>\n<tr><td class=\"num\">18.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Bisphenol PH (BPPH)\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/24038-68-4\/Bisphenol PH\" target=\"_blank\" rel=\"noopener\">Bisphenol PH (BPPH)<\/a><\/td><td class=\"oth\">6.87<\/td><td class=\"oth\">2.5<\/td><td class=\"oth\">379.0<\/td><td class=\"oth\">364.1<\/td><td class=\"oth\">209.2<\/td><td class=\"oth\">3<\/td><\/tr>\n<\/tbody><\/table><\/div><div class=\"chromatogram-conditions\"><h4>Conditions<\/h4><div class=\"conditions-container container-fluid\"><div class=\"row\"><table class=\"conditions col-lg-6 col-12\"><tr><th class=\"conditions_header\" scope=\"row\">Column<\/th><td>Raptor Biphenyl  (<a target=\"_blank\" href=\"https:\/\/www.restek.com\/p\/9309A5E?utm_source=chromatograms&amp;utm_medium=link&amp;utm_campaign=LC_EV0604\" rel=\"noopener\">cat.# 9309A5E<\/a>)<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Dimensions:<\/th><td>50 mm x 3.0 mm ID<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Particle Size:<\/th><td>2.7 \u00b5m<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Pore Size:<\/th><td>90 \u00c5<\/td><\/tr><tr><td><\/td><tr><th class=\"sub conditions_header\" scope=\"row\">Guard Column:<\/th><td>Raptor Biphenyl EXP guard column cartridge 5 mm, 3.0 mm ID, 2.7 \u00b5m (<a target=\"_blank\" href=\"https:\/\/www.restek.com\/p\/9309A0253?utm_source=chromatograms&amp;utm_medium=link&amp;utm_campaign=LC_EV0604\" rel=\"noopener\">cat.# 9309A0253<\/a>)<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Temp.:<\/th><td>30 \u00b0C<\/td><\/tr><tr class=\"cgram_header_row\"><th class=\"conditions_header\" scope=\"row\">Standard\/Sample<\/th><td><\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Diluent:<\/th><td>Water<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Conc.:<\/th><td>2.5 ng\/mL<\/td><\/tr><td><\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Inj. Vol.:<\/th><td>10 \u00b5L <\/td><\/tr><tr class=\"cgram_header_row\"><th class=\"conditions_header\" scope=\"row\">Mobile Phase<\/th><td><\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">A:<\/th><td>Water <\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">B:<\/th><td>Methanol <\/td><\/tr><tr><td><\/td><td><table class=\"cgram_ramp\"><thead><tr><th>Time (min)<\/th><th>Flow (mL\/min)<\/th><th>%A<\/th><th>%B<\/th><\/tr><\/thead><tbody><tr><td>0.00<\/td><td>0.8<\/td><td>60<\/td><td>40<\/td><\/tr><tr><td>1.00<\/td><td>0.8<\/td><td>60<\/td><td>40<\/td><\/tr><tr><td>6.50<\/td><td>0.8<\/td><td>15<\/td><td>85<\/td><\/tr><tr><td>7.00<\/td><td>0.8<\/td><td>15<\/td><td>85<\/td><\/tr><tr><td>7.01<\/td><td>0.8<\/td><td>60<\/td><td>40<\/td><\/tr><tr><td>8.50<\/td><td>0.8<\/td><td>60<\/td><td>40<\/td><\/tr><\/tbody><\/table><\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Max Pressure:<\/th><td>329 bar<\/td><\/tr><\/table><table class=\"conditions col-lg-6 col-12\"><tr><th class=\"conditions_header\" scope=\"row\">Detector<\/th><td>Shimadzu 8060 MS\/MS<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Ion Source:<\/th><td>Electrospray <\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Ion Mode:<\/th><td>ESI- <\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Mode:<\/th><td>MRM <\/td><\/tr><tr class=\"cgram_header_row\"><th class=\"conditions_header\" scope=\"row\">Instrument<\/th><td>Shimadzu Nexera X2<\/td><\/tr><tr class=\"cgram_header_row\"><th class=\"conditions_header\" scope=\"row\">Sample Preparation<\/th><td>Water samples were aliquoted into an amber short-cap vial (<a target=\"_blank\" href=\"https:\/\/www.restek.com\/p\/21142?utm_source=chromatograms&amp;utm_medium=link&amp;utm_campaign=LC_EV0604\" rel=\"noopener\">cat.# 21142<\/a>) and fortified with analytes at 2.5 ng\/mL. The samples were then capped with a 9 mm short cap (<a target=\"_blank\" href=\"https:\/\/www.restek.com\/p\/24497?utm_source=chromatograms&amp;utm_medium=link&amp;utm_campaign=LC_EV0604\" rel=\"noopener\">cat.# 24497<\/a>) and vortexed ~30 seconds before being injection onto the LC-MS\/MS for analysis. <\/td><\/tr><tr class=\"cgram_header_row\"><th class=\"conditions_header\" scope=\"row\">Notes<\/th><td>The flow was directed to waste for the first minute of analysis and after 7.00 minutes to maintain cleanliness of the source. <\/td><\/tr><\/table><\/div><\/div><\/div><div class=\"chromatogram-pdf-link\"><a href=\"https:\/\/ez.restek.com\/images\/cgram\/lc_ev0604.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"18\" height=\"18\" viewBox=\"0 0 18 18\"><g data-name=\"Group 2996\"><path data-name=\"Rectangle 1246\" d=\"M0 0h18v18H0z\" style=\"fill: none;\"><\/path><\/g><g data-name=\"Group 2997\"><path data-name=\"Path 729\" d=\"M13.412 11.4v2.017H5.345V11.4H4v2.017a1.349 1.349 0 0 0 1.345 1.345h8.068a1.349 1.349 0 0 0 1.345-1.345V11.4zm-.672-2.694-.948-.948-1.741 1.735V4H8.706v5.493L6.965 7.758l-.948.948 3.361 3.361z\" transform=\"translate(-.437 -.414)\" style=\"fill: rgb(13, 123, 196);\"><\/path><\/g><\/svg>Download PDF<\/a><\/div><\/div><\/div>\n<\/div><\/div><\/div>\n\n\n<h3 class=\"wp-block-heading\">Internal Standard Assessment<\/h3>\n\n\n\n<p>Two isotopically labeled internal standards were examined for the analysis of bisphenols A, B, and S to determine if they would effectively compensate for matrix effects. The results showed excellent accuracy and precision. However, when the two internal standards were used for the comprehensive 15 bisphenols method, the results showed that using only two returned poor quantitative results for the mid-to-late eluting compounds. The optimization of valve switching helped with accuracy and precision for bisphenols F and E, but it did not improve quantitative results for bisphenols AF, G, BP, M, P, and PH. A third internal standard, bisphenol P-<sup>13<\/sup>C4, was introduced into the method and acceptable precision and accuracy values were obtained for all 15 bisphenols.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Linearity<\/h3>\n\n\n\n<p>Both LC-MS\/MS methods for bisphenols analysis produced linear calibrations. Using a 1\/x weighted linear regression, bisphenols A, B, and S showed acceptable linearities with r<sup>2<\/sup> values of &gt;0.993 and deviations of &lt;20% across a calibration range of 2.5-300 \u00b5g\/L. The comprehensive method also used a linear regression of 1\/x with acceptable linearities of r<sup>2 <\/sup>&gt;0.991 and deviations of &lt;20% across calibration range of 2.5-300 \u00b5g\/L for all compounds except bisphenol PH (5-150 \u00b5g\/L); bisphenol G (5-100 \u00b5g\/L); and bisphenol AF (2.5-150 \u00b5g\/L).<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Accuracy and Precision<\/h3>\n\n\n\n<p>Drinking water was collected locally and fortified with bisphenols A, B, and S at 2.5 (LLOQ); 7.5 (LQC); and 75 (MQC) \u00b5g\/L. Three batches were analyzed over three days for a total of nine replicates. The results can be seen in Table V. Accuracy ranged from 82.4-113.7% for bisphenols A, B, S for intraday results and 86.6-108.3% for interday percent recovery. Precision measured by %RSD values was \u226411.2% for intraday results and \u22646.6% for interday results.<\/p>\n\n\n\n<p><strong>Table V:<\/strong> Accuracy and Precision Results for Bisphenols A, B, and S Method<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\"><\/td><td class=\"has-text-align-center\" data-align=\"center\"><\/td><td class=\"has-text-align-center\" data-align=\"center\" colspan=\"3\"><strong>Day 1 <\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\" colspan=\"3\"><strong>Day 2 <\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\" colspan=\"3\"><strong>Day 3<\/strong> <\/td><td class=\"has-text-align-center\" data-align=\"center\" colspan=\"2\"><strong>Interday<\/strong> <\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>Water Sample<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>Target Conc. (\u00b5g\/L) <\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>Calc. Conc. (\u00b5g\/L) <\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>% Recovery <\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>%RSD<\/strong> <\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>Calc. Conc. (\u00b5g\/L) <\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>% Recovery <\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>%RSD<\/strong> <\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>Calc. Conc. (\u00b5g\/L) <\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>% Recovery <\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>%RSD <\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>Average<\/strong> <\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>%RSD<\/strong> <\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\" colspan=\"13\"><strong><em>Bisphenol S <\/em><\/strong><\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\" rowspan=\"3\">\n\t\t\t\t1 Drinking Water\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.2\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t86.8\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t4.0\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.3\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t90.6\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.2\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.4\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t95.7\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t1.2\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t91.0\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t4.9\n\t\t\t<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t7.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t7.9\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t106.0\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t7.8\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t103.8\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t3.6\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t7.9\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t105.2\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t1.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t105.0\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t1.1\n\t\t\t<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t75.0\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t78.0\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t103.9\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t0.9\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t75.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t100.7\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t4.1\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t76.8\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t102.4\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t1.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t102.3\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t1.6\n\t\t\t<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\" rowspan=\"3\">\n\t\t\t\t2 Ice Machine Water\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.1\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t84.8\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.9\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.3\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t91.2\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t4.3\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.4\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t95.0\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.9\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t90.3\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t5.7\n\t\t\t<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t7.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t7.6\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t101.3\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t5.8\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t7.9\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t104.7\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.9\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t7.8\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t104.2\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t1.8\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t103.4\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t1.8\n\t\t\t<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t75.0\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t77.6\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t103.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t5.7\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t78.7\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t104.9\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t3.3\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t75.7\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t100.9\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t1.9\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t103.1\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.0\n\t\t\t<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\" rowspan=\"3\">\n\t\t\t\t3 Drinking water\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.1\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t84.0\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t3.0\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.3\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t91.1\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t5.4\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.4\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t95.8\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t1.6\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t90.3\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t6.6\n\t\t\t<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t7.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t7.7\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t102.4\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t7.4\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t7.9\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t105.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t4.7\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t7.9\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t105.1\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t1.2\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t104.3\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t1.6\n\t\t\t<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t75.0\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t80.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t107.3\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.8\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t80.7\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t107.6\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t5.2\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t77.0\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t102.6\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t1.3\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t105.9\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.6\n\t\t\t<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\" rowspan=\"3\">\n\t\t\t\t4 Drinking water\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.1\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t84.6\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t7.6\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.2\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t86.3\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t4.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.2\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t88.9\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.6\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t86.6\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.5\n\t\t\t<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t7.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t7.6\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t101.1\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.6\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t7.3\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t97.1\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t4.4\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t7.4\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t98.0\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t6.4\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t98.7\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.1\n\t\t\t<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t75.0\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t78.0\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t103.9\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.2\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t78.1\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t104.1\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t1.9\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t78.0\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t104.0\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.0\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t104.0\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t0.1\n\t\t\t<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\" rowspan=\"3\">\n\t\t\t\t5 Drinking water\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.1\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t82.4\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t4.4\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.3\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t92.6\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t5.3\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.3\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t91.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.4\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t88.8\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t6.3\n\t\t\t<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t7.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t7.6\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t101.4\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t4.8\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t8.1\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t108.2\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.8\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t7.6\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t101.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.3\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t103.7\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t3.8\n\t\t\t<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t75.0\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t77.8\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t103.7\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.0\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t85.3\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t113.7\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t3.9\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t76.1\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t101.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t1.9\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t106.3\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t6.1\n\t\t\t<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\" colspan=\"13\"><strong><em>Bisphenol B <\/em><\/strong><\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\"><\/td><td class=\"has-text-align-center\" data-align=\"center\"><\/td><td class=\"has-text-align-center\" data-align=\"center\" colspan=\"3\"><strong>Day 1 <\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\" colspan=\"3\"><strong>Day 2 <\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\" colspan=\"3\"><strong>Day 3 <\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\" colspan=\"2\"><strong>Interday<\/strong> <\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>Water Sample <\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>Target Conc. (\u00b5g\/L) <\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>Calc. Conc. (\u00b5g\/L) <\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>% Recovery <\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>%RSD <\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>Calc. Conc. (\u00b5g\/L) <\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>% Recovery <\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>%RSD <\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>Calc. Conc. (\u00b5g\/L)<\/strong> <\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>% Recovery <\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>%RSD<\/strong> <\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>Average<\/strong> <\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>%RSD <\/strong><\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\" rowspan=\"3\">\n\t\t\t\t1 Drinking Water\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.7\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t106.3\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.6\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.7\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t106.6\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t6.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.6\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t102.4\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t4.7\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t105.1\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.2\n\t\t\t<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t7.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t7.3\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t97.0\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.1\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t7.3\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t97.8\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.9\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t7.0\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t92.8\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t4.1\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t95.9\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.8\n\t\t\t<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t75.0\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t72.0\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t96.0\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t6.6\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t69.6\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t92.8\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t3.4\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t74.4\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t99.2\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t11.2\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t96.0\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t3.3\n\t\t\t<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\" rowspan=\"3\">\n\t\t\t\t2 Ice Machine Water\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t100.1\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t5.4\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.4\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t96.3\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t4.7\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t101.4\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t1.7\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t99.3\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.7\n\t\t\t<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t7.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t7.2\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t95.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.3\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t7.0\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t93.2\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t5.3\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t7.1\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t94.4\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t10.6\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t94.4\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t1.3\n\t\t\t<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t75.0\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t69.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t92.7\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.2\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t65.7\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t87.6\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t1.8\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t70.2\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t93.7\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t5.3\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t91.3\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t3.5\n\t\t\t<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\" rowspan=\"3\">\n\t\t\t\t3 Drinking water\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t101.9\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t3.8\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.7\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t108.0\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t0.1\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.7\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t106.8\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t3.7\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t105.6\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t3.0\n\t\t\t<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t7.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t7.4\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t98.1\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t1.7\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t7.3\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t97.2\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t4.3\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t7.2\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t96.2\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t3.2\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t97.2\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t1.0\n\t\t\t<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t75.0\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t68.2\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t91.0\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t3.1\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t71.1\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t94.8\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.4\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t72.6\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t96.8\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t4.0\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t94.2\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t3.2\n\t\t\t<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\" rowspan=\"3\">\n\t\t\t\t4 Drinking water\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.7\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t106.4\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t5.8\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.7\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t110.0\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t1.7\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.7\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t108.6\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t7.2\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t108.3\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t1.7\n\t\t\t<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t7.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t7.8\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t104.2\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t3.1\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t7.7\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t103.0\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.3\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t7.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t100.4\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t5.6\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t102.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t1.9\n\t\t\t<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t75.0\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t79.6\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t106.1\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t3.0\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t72.7\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t96.9\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t1.7\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t71.6\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t95.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t3.4\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t99.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t5.8\n\t\t\t<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\" rowspan=\"3\">\n\t\t\t\t5 Drinking water\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.7\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t107.7\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t1.7\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.6\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t102.4\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t7.2\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t101.7\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t0.2\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t103.9\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t3.1\n\t\t\t<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t7.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t7.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t100.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.6\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t7.4\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t99.0\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t6.7\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t89.9\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t6.0\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t96.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t6.0\n\t\t\t<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t75.0\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t71.4\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t95.2\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.4\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t70.6\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t94.1\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t1.9\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t66.0\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t88.0\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t1.7\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t92.4\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t4.2\n\t\t\t<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\" colspan=\"13\"><strong><em>Bisphenol A <\/em><\/strong><\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\"><\/td><td class=\"has-text-align-center\" data-align=\"center\"><\/td><td class=\"has-text-align-center\" data-align=\"center\" colspan=\"3\"><strong>Day 1<\/strong> <\/td><td class=\"has-text-align-center\" data-align=\"center\" colspan=\"3\"><strong>Day 2<\/strong> <\/td><td class=\"has-text-align-center\" data-align=\"center\" colspan=\"3\"><strong>Day 3<\/strong> <\/td><td class=\"has-text-align-center\" data-align=\"center\" colspan=\"2\"><strong>Interday<\/strong> <\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>Water Sample<\/strong> <\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>Target Conc. (\u00b5g\/L) <\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>Calc. Conc. (\u00b5g\/L) <\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>% Recovery<\/strong> <\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>%RSD <\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>Calc. Conc. (\u00b5g\/L)<\/strong> <\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>% Recovery <\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>%RSD <\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>Calc. Conc. (\u00b5g\/L) <\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>% Recovery <\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>%RSD <\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>Average<\/strong> <\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>%RSD<\/strong> <\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\" rowspan=\"3\">\n\t\t\t\t1 Drinking Water\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.8\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t110.1\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t7.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t101.0\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t8.4\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.6\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t105.1\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.9\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t105.4\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t4.3\n\t\t\t<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t7.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t7.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t100.2\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t6.4\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t7.6\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t102.0\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t0.9\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t7.2\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t96.0\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t3.9\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t99.4\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t3.1\n\t\t\t<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t75.0\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t72.9\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t97.1\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t3.6\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t71.4\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t95.2\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t3.0\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t76.9\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t102.6\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t5.8\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t98.3\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t3.9\n\t\t\t<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\" rowspan=\"3\">\n\t\t\t\t2 Ice Machine Water\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t99.2\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t4.3\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.7\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t107.4\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t8.1\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.6\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t103.9\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t9.4\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t103.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t4.0\n\t\t\t<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t7.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t7.6\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t101.6\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.9\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t7.7\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t102.4\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t5.7\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t7.7\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t102.3\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t6.1\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t102.1\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t0.4\n\t\t\t<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t75.0\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t71.3\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t95.1\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t4.6\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t73.6\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t98.1\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t3.3\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t73.8\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t98.4\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t1.4\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t97.2\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t1.9\n\t\t\t<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\" rowspan=\"3\">\n\t\t\t\t3 Drinking water\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.7\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t108.7\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t7.7\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.6\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t104.1\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t1.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t100.6\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t4.8\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t104.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t3.9\n\t\t\t<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t7.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t7.8\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t104.0\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t3.6\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t7.4\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t98.2\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t3.6\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t7.4\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t98.7\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t3.1\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t100.3\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t3.2\n\t\t\t<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t75.0\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t72.6\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t96.8\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.9\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t75.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t100.6\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t4.1\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t76.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t102.0\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t3.3\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t99.8\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.7\n\t\t\t<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\" rowspan=\"3\">\n\t\t\t\t4 Drinking water\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.6\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t102.7\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t5.4\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t101.3\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t3.2\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.6\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t106.0\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t8.9\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t103.3\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.3\n\t\t\t<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t7.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t8.0\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t107.0\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t3.4\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t7.6\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t100.7\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t3.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t7.6\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t101.8\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t5.3\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t103.2\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t3.3\n\t\t\t<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t75.0\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t75.3\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t100.4\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t3.1\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t75.0\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t100.0\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.8\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t73.4\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t97.8\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t5.4\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t99.4\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t1.4\n\t\t\t<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\" rowspan=\"3\">\n\t\t\t\t5 Drinking water\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t100.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t6.2\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.7\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t107.3\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t3.1\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t99.4\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t3.2\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t102.4\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t4.2\n\t\t\t<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t7.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t7.7\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t102.2\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t6.1\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t7.4\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t98.4\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.5\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t7.1\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t94.4\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t7.7\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t98.4\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t4.0\n\t\t\t<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t75.0\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t73.3\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t97.7\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t2.1\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t73.7\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t98.3\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t0.2\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t71.3\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t95.1\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t3.9\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t97.0\n\t\t\t<\/td><td class=\"has-text-align-center\" data-align=\"center\">\n\t\t\t\t1.8\n\t\t\t<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>The comprehensive method also had validation and accuracy experiments performed. Water collected locally was fortified with 15 bisphenols at 2.5, 7.5, and 75 \u00b5g\/L. Three batches were analyzed over three days for a total of nine replicates. The results can be seen in Figures 3, 4, and 5. Accuracy ranged from 88.9-115.9% for the comprehensive method for interday percent recovery. Precision as measured by %RSD was \u226417.3% for interday results (n=9).<\/p>\n\n\n<div class=\"wp-block-custom-chromatogram-article-top\"><div class=\"chromatogram-article-placeholder\"><div class=\"figure-heading\"><strong>Figure 3:<\/strong> Interday Accuracy and Precision for the Comprehensive Bisphenols Method at the LLOQ (2.5 \u00b5g\/L) (n=9) (Note that recovery at 2.5 \u00b5g\/L was not assessed for bisphenols PH and G due to their higher LLOQs.)<\/div><div class='chromatogram-article-inner-full'><div class=\"chromatogram-article-inner\">\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1334\" height=\"538\" src=\"https:\/\/discover.restek.com\/wp-content\/uploads\/figure-EVAN5394-03.jpg\" alt=\"LLQ Recovery (2.5 \u03bcg\/L)\" class=\"wp-image-69984\" title=\"-\" srcset=\"https:\/\/discover.restek.com\/wp-content\/uploads\/figure-EVAN5394-03.jpg 1334w, https:\/\/discover.restek.com\/wp-content\/uploads\/figure-EVAN5394-03-300x121.jpg 300w, https:\/\/discover.restek.com\/wp-content\/uploads\/figure-EVAN5394-03-1024x413.jpg 1024w, https:\/\/discover.restek.com\/wp-content\/uploads\/figure-EVAN5394-03-768x310.jpg 768w\" sizes=\"auto, (max-width: 1334px) 100vw, 1334px\" \/><\/figure>\n<\/div>\n<\/div><\/div><\/div>\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n<div class=\"wp-block-custom-chromatogram-article-top\"><div class=\"chromatogram-article-placeholder\"><div class=\"figure-heading\"><strong>Figure 4<\/strong>: Interday Accuracy and Precision for the Comprehensive Bisphenols Method at the LQC (7.5 \u00b5g\/L) (n=9)<\/div><div class='chromatogram-article-inner-full'><div class=\"chromatogram-article-inner\">\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1340\" height=\"631\" src=\"https:\/\/discover.restek.com\/wp-content\/uploads\/figure-EVAN5394-04.jpg\" alt=\"LQC Recovery (7.5 \u03bcg\/L)\" class=\"wp-image-69990\" title=\"-\" srcset=\"https:\/\/discover.restek.com\/wp-content\/uploads\/figure-EVAN5394-04.jpg 1340w, https:\/\/discover.restek.com\/wp-content\/uploads\/figure-EVAN5394-04-300x141.jpg 300w, https:\/\/discover.restek.com\/wp-content\/uploads\/figure-EVAN5394-04-1024x482.jpg 1024w, https:\/\/discover.restek.com\/wp-content\/uploads\/figure-EVAN5394-04-768x362.jpg 768w\" sizes=\"auto, (max-width: 1340px) 100vw, 1340px\" \/><\/figure>\n<\/div>\n<\/div><\/div><\/div>\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n<div class=\"wp-block-custom-chromatogram-article-top\"><div class=\"chromatogram-article-placeholder\"><div class=\"figure-heading\"><strong>Figure 5<\/strong>: Interday Accuracy and Precision for the Comprehensive Bisphenols Method for at the MQC (75 \u00b5g\/L) (n=9)<\/div><div class='chromatogram-article-inner-full'><div class=\"chromatogram-article-inner\">\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1340\" height=\"537\" src=\"https:\/\/discover.restek.com\/wp-content\/uploads\/figure-EVAN5394-05.jpg\" alt=\"MQC Recovery (75 \u03bcg\/L)\" class=\"wp-image-69996\" title=\"-\" srcset=\"https:\/\/discover.restek.com\/wp-content\/uploads\/figure-EVAN5394-05.jpg 1340w, https:\/\/discover.restek.com\/wp-content\/uploads\/figure-EVAN5394-05-300x120.jpg 300w, https:\/\/discover.restek.com\/wp-content\/uploads\/figure-EVAN5394-05-1024x410.jpg 1024w, https:\/\/discover.restek.com\/wp-content\/uploads\/figure-EVAN5394-05-768x308.jpg 768w\" sizes=\"auto, (max-width: 1340px) 100vw, 1340px\" \/><\/figure>\n\n<\/div><\/div><\/div>\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Conclusion<\/h2>\n\n\n\n<p>In this study, two robust LC-MS\/MS methods for bisphenols analysis in drinking water were developed and both generated good quantitative results. A direct injection approach was utilized to streamline sample preparation, and the two complementary analytical methods produced complete chromatographic separation of all compounds in fast analysis times that are conducive to high-throughput testing. One method was optimized for targeted analysis of BPA, BPS, and BPB because they are the most commonly tested bisphenols. The other method was optimized for 15 bisphenols to support labs wanting to expand into more comprehensive analyte lists in anticipation of regulatory changes. The developed methods meet the sensitivity requirements outlined in the EU\u2019s Drinking Water Directive, offering a practical solution for routine monitoring of bisphenol contamination.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">References<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li>X. Ye, L. Wong, A.M. Bishop, A.M. Calafat, Variability of urinary concentrations of bisphenol A in spot samples, first morning voids, and 24-hour collections. Environ Health Perspect, 119 (7) (2011) 983\u2013988. <a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/21406337\/\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/pubmed.ncbi.nlm.nih.gov\/21406337\/<\/a><\/li>\n\n\n\n<li>M.E. Cull, L.M. Winn, Bisphenol A and its potential mechanism of action for reproductive toxicity. Toxicology 511 (2025) 154040. <a href=\"https:\/\/doi.org\/10.1016\/j.tox.2024.154040\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/doi.org\/10.1016\/j.tox.2024.154040<\/a><\/li>\n\n\n\n<li>State of Californai, OEHHA, Bisphenol S (BPS) Added To Proposition 65 List Following 2023 Meeting of The Developmental and Reproductive Toxicant Identification Committee, January 23, 2014. <a href=\"https:\/\/oehha.ca.gov\/proposition-65\/crnr\/bisphenol-s-bps-added-proposition-65-list-following-2023-meeting-developmental-and-reproductive\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/oehha.ca.gov\/proposition-65\/crnr\/bisphenol-s-bps-added-proposition-65-list-following-2023-meeting-developmental-and-reproductive<\/a>. Accessed June 27, 2025.<\/li>\n\n\n\n<li>Bisphenol B, an endocrine disruptor for humans and the environment. Anses. September 3, 2021. <a href=\"https:\/\/www.anses.fr\/en\/content\/bisphenol-b-endocrine-disruptor-humans-and-environment\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/www.anses.fr\/en\/content\/bisphenol-b-endocrine-disruptor-humans-and-environment<\/a> Accessed June 27, 2015.<\/li>\n\n\n\n<li>Eur Eau position paper : Bisphenol-A and drinking water. Water News Europe, Press Release, April 28, 2025. <a href=\"https:\/\/www.waternewseurope.com\/eureau-position-paper-bisphenol-a-and-drinking-water\/\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/www.waternewseurope.com\/eureau-position-paper-bisphenol-a-and-drinking-water\/<\/a> Accessed July 28, 2025.<\/li>\n<\/ol>\n\n\n        <div class=\"cpb\">\n            <h3 class=\"cpb-heading\">Products Mentioned<\/h3>\n            <hr class=\"cpb-heading-underline\" \/>\n            <div class=\"cpb-list\">\n                                    <div class=\"cpb-item\">\n                        <div class=\"cpb-col cpb-col--left\">\n                            <a class=\"cpb-catalog\" target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/www.restek.com\/p\/9309A5E\">                                Catalog No. 9309A5E                            <\/a>                        <\/div>\n                        <div class=\"cpb-col cpb-col--middle\">\n                            <div class=\"cpb-title\">Raptor Biphenyl, 2.7 \u00b5m, 50 x 3.0 mm HPLC\u30ab\u30e9\u30e0<\/div>\n                        <\/div>\n                        <div class=\"cpb-col cpb-col--right\">\n                                                            <a class=\"cpb-view-btn\" target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/www.restek.com\/p\/9309A5E\">\u88fd\u54c1\u60c5\u5831\u3092\u898b\u308b<\/a>\n                                                    <\/div>\n                    <\/div>\n                                    <div class=\"cpb-item\">\n                        <div class=\"cpb-col cpb-col--left\">\n                            <a class=\"cpb-catalog\" target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/www.restek.com\/p\/9309A0253\">                                Catalog No. 9309A0253                            <\/a>                        <\/div>\n                        <div class=\"cpb-col cpb-col--middle\">\n                            <div class=\"cpb-title\">Raptor Biphenyl EXP Guard Column Cartridge, 2.7 \u00b5m, 5 x 3.0 mm, 3-pk.<\/div>\n                        <\/div>\n                        <div class=\"cpb-col cpb-col--right\">\n                                                            <a class=\"cpb-view-btn\" target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/www.restek.com\/p\/9309A0253\">\u88fd\u54c1\u60c5\u5831\u3092\u898b\u308b<\/a>\n                                                    <\/div>\n                    <\/div>\n                                    <div class=\"cpb-item\">\n                        <div class=\"cpb-col cpb-col--left\">\n                            <a class=\"cpb-catalog\" target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/www.restek.com\/p\/25808\">                                Catalog No. 25808                            <\/a>                        <\/div>\n                        <div class=\"cpb-col cpb-col--middle\">\n                            <div class=\"cpb-title\">EXP Direct Connect Holder for EXP Guard Cartridges, Includes Fitting &amp; Ferrules<\/div>\n                        <\/div>\n                        <div class=\"cpb-col cpb-col--right\">\n                                                            <a class=\"cpb-view-btn\" target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/www.restek.com\/p\/25808\">\u88fd\u54c1\u60c5\u5831\u3092\u898b\u308b<\/a>\n                                                    <\/div>\n                    <\/div>\n                                    <div class=\"cpb-item\">\n                        <div class=\"cpb-col cpb-col--left\">\n                            <a class=\"cpb-catalog\" target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/www.restek.com\/p\/21142\">                                Catalog No. 21142                            <\/a>                        <\/div>\n                        <div class=\"cpb-col cpb-col--middle\">\n                            <div class=\"cpb-title\">Short-Cap Vial with Grad Marking Spot, 9-425 Screw-Thread, 2.0 mL, 9 mm, 12 x 32 (vial only), Amber, 100-pk.<\/div>\n                        <\/div>\n                        <div class=\"cpb-col cpb-col--right\">\n                                                            <a class=\"cpb-view-btn\" target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/www.restek.com\/p\/21142\">\u88fd\u54c1\u60c5\u5831\u3092\u898b\u308b<\/a>\n                                                    <\/div>\n                    <\/div>\n                                    <div class=\"cpb-item\">\n                        <div class=\"cpb-col cpb-col--left\">\n                            <a class=\"cpb-catalog\" target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/www.restek.com\/p\/24497\">                                Catalog No. 24497                            <\/a>                        <\/div>\n                        <div class=\"cpb-col cpb-col--middle\">\n                            <div class=\"cpb-title\">Short Screw Cap, Polypropylene, Screw-Thread, PTFE\/Silicone\/PTFE Septa, Blue, Preassembled, 2.0 mL, 9 mm, 100-pk.<\/div>\n                        <\/div>\n                        <div class=\"cpb-col cpb-col--right\">\n                                                            <a class=\"cpb-view-btn\" target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/www.restek.com\/p\/24497\">\u88fd\u54c1\u60c5\u5831\u3092\u898b\u308b<\/a>\n                                                    <\/div>\n                    <\/div>\n                            <\/div>\n        <\/div>\n        \n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Two LC-MS\/MS methods for bisphenols in drinking water were developed to provide labs with options for both a targeted BPA, BPS, and BPB analysis as well as a comprehensive approach that includes 15 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