{"id":43434,"date":"2025-10-03T21:07:16","date_gmt":"2025-10-03T21:07:16","guid":{"rendered":"https:\/\/discover.restek.com\/uncategorized\/guide-to-pfas-testing-methods\/"},"modified":"2026-04-14T17:21:21","modified_gmt":"2026-04-14T17:21:21","slug":"guide-to-pfas-testing-methods","status":"publish","type":"post","link":"https:\/\/discover.restek.com\/es\/articles\/evar3552\/guide-to-pfas-testing-methods","title":{"rendered":"Guide to PFAS Testing Methods"},"content":{"rendered":"<style>.wp-block-kadence-advancedbtn.kb-btns43434_0a353e-1d{gap:var(--global-kb-gap-xs, 0.5rem );justify-content:flex-start;align-items:center;}.kt-btns43434_0a353e-1d .kt-button{font-weight:normal;font-style:normal;}.kt-btns43434_0a353e-1d .kt-btn-wrap-0{margin-right:5px;}.wp-block-kadence-advancedbtn.kt-btns43434_0a353e-1d .kt-btn-wrap-0 .kt-button{color:#555555;border-color:#555555;}.wp-block-kadence-advancedbtn.kt-btns43434_0a353e-1d .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns43434_0a353e-1d .kt-btn-wrap-0 .kt-button:focus{color:#ffffff;border-color:#444444;}.wp-block-kadence-advancedbtn.kt-btns43434_0a353e-1d .kt-btn-wrap-0 .kt-button::before{display:none;}.wp-block-kadence-advancedbtn.kt-btns43434_0a353e-1d .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns43434_0a353e-1d .kt-btn-wrap-0 .kt-button:focus{background:#444444;}<\/style>\n<div class=\"wp-block-kadence-advancedbtn kb-buttons-wrap kb-btns43434_0a353e-1d\"><style>ul.menu .wp-block-kadence-advancedbtn .kb-btn43434_3c9b60-a7.kb-button{width:initial;}<\/style><a class=\"kb-button kt-button button kb-btn43434_3c9b60-a7 kt-btn-size-small kt-btn-width-type-auto kb-btn-global-fill  kt-btn-has-text-true kt-btn-has-svg-false  wp-block-kadence-singlebtn\" href=\"https:\/\/explore.restek.com\/PFAS-Guides\" target=\"_blank\" rel=\"noopener\"><span class=\"kt-btn-inner-text\">Download PDF<\/span><\/a><\/div>\n\n\n\n<p>Early movements in establishing PFAS testing methods began in 2009 with U.S. EPA Method 537 and ISO 25101:2009 methods targeting select compounds in water\u2014the most common and direct exposure pathway for humans. Since then, as the number of PFAS and their prevalence have grown, government agencies and scientific communities around the world have developed newer PFAS testing methods and guidance documents for a wider range of compounds and sample matrices. The following method collection, organized by region, provides an overview of the scope of current PFAS testing methods and guidelines as well as the recommended products used for each.<\/p>\n\n\n\n<p>For labs starting PFAS analysis or adding new compounds or matrices to their testing program, the method and guideline summaries in the links below can help you compare methods, select an appropriate workflow, and find the right supplies. You can also register and directly <a href=\"https:\/\/explore.restek.com\/PFAS-Guides\" target=\"_blank\" rel=\"noreferrer noopener\">compare analyte lists and matrices across PFAS analysis methods here<\/a>, and you can even model PFAS methods online before trying them in the lab using Restek\u2019s free <a href=\"https:\/\/ez.restek.com\/proezlc\" target=\"_blank\" rel=\"noopener\">Pro <em>EZ<\/em>LC chromatogram modeler<\/a>. An <a href=\"https:\/\/www.restek.com\/pages\/lab-supplies-for-pfas-analysis\" target=\"_blank\" rel=\"noopener\">overview of products<\/a> recommended across methods is also available. If you have questions or want to further explore PFAS analysis, visit <a href=\"https:\/\/www.restek.com\/PFAS\" target=\"_blank\" rel=\"noopener\">www.restek.com\/PFAS<\/a> for additional resources or contact your local Restek representative for assistance.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">UNITED STATES PFAS TESTING METHODS &amp; GUIDELINES<\/h2>\n\n\n\n<p><\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n\n<style>.wp-block-kadence-advancedbtn.kb-btns43434_f9552f-a7{gap:var(--global-kb-gap-xs, 0.5rem );justify-content:center;align-items:center;}.kt-btns43434_f9552f-a7 .kt-button{font-weight:normal;font-style:normal;}.kt-btns43434_f9552f-a7 .kt-btn-wrap-0{margin-right:5px;}.wp-block-kadence-advancedbtn.kt-btns43434_f9552f-a7 .kt-btn-wrap-0 .kt-button{color:#555555;border-color:#555555;}.wp-block-kadence-advancedbtn.kt-btns43434_f9552f-a7 .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns43434_f9552f-a7 .kt-btn-wrap-0 .kt-button:focus{color:#ffffff;border-color:#444444;}.wp-block-kadence-advancedbtn.kt-btns43434_f9552f-a7 .kt-btn-wrap-0 .kt-button::before{display:none;}.wp-block-kadence-advancedbtn.kt-btns43434_f9552f-a7 .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns43434_f9552f-a7 .kt-btn-wrap-0 .kt-button:focus{background:#444444;}<\/style>\n<div class=\"wp-block-kadence-advancedbtn kb-buttons-wrap kb-btns43434_f9552f-a7\"><style>ul.menu .wp-block-kadence-advancedbtn .kb-btn43434_41a8c9-9f.kb-button{width:initial;}<\/style><a class=\"kb-button kt-button button kb-btn43434_41a8c9-9f kt-btn-size-standard kt-btn-width-type-full kb-btn-global-fill  kt-btn-has-text-true kt-btn-has-svg-false  wp-block-kadence-singlebtn\" href=\"https:\/\/discover.restek.com\/articles\/EVAR4284\/pfas-analysis-by-us-epa-method-537-1-for-drinking-water\/\"><span class=\"kt-btn-inner-text\">EPA 537.1<\/span><\/a><\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n\n<style>.wp-block-kadence-advancedbtn.kb-btns43434_c8b957-53{gap:var(--global-kb-gap-xs, 0.5rem );justify-content:center;align-items:center;}.kt-btns43434_c8b957-53 .kt-button{font-weight:normal;font-style:normal;}.kt-btns43434_c8b957-53 .kt-btn-wrap-0{margin-right:5px;}.wp-block-kadence-advancedbtn.kt-btns43434_c8b957-53 .kt-btn-wrap-0 .kt-button{color:#555555;border-color:#555555;}.wp-block-kadence-advancedbtn.kt-btns43434_c8b957-53 .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns43434_c8b957-53 .kt-btn-wrap-0 .kt-button:focus{color:#ffffff;border-color:#444444;}.wp-block-kadence-advancedbtn.kt-btns43434_c8b957-53 .kt-btn-wrap-0 .kt-button::before{display:none;}.wp-block-kadence-advancedbtn.kt-btns43434_c8b957-53 .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns43434_c8b957-53 .kt-btn-wrap-0 .kt-button:focus{background:#444444;}<\/style>\n<div class=\"wp-block-kadence-advancedbtn kb-buttons-wrap kb-btns43434_c8b957-53\"><style>ul.menu .wp-block-kadence-advancedbtn .kb-btn43434_b794c6-3b.kb-button{width:initial;}<\/style><a class=\"kb-button kt-button button kb-btn43434_b794c6-3b kt-btn-size-standard kt-btn-width-type-full kb-btn-global-fill  kt-btn-has-text-true kt-btn-has-svg-false  wp-block-kadence-singlebtn\" href=\"https:\/\/discover.restek.com\/articles\/EVAR4285\/pfas-analysis-by-us-epa-method-533-for-drinking-water\/\"><span class=\"kt-btn-inner-text\">EPA 533<\/span><\/a><\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n\n<style>.wp-block-kadence-advancedbtn.kb-btns43434_1419a4-a5{gap:var(--global-kb-gap-xs, 0.5rem );justify-content:center;align-items:center;}.kt-btns43434_1419a4-a5 .kt-button{font-weight:normal;font-style:normal;}.kt-btns43434_1419a4-a5 .kt-btn-wrap-0{margin-right:5px;}.wp-block-kadence-advancedbtn.kt-btns43434_1419a4-a5 .kt-btn-wrap-0 .kt-button{color:#555555;border-color:#555555;}.wp-block-kadence-advancedbtn.kt-btns43434_1419a4-a5 .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns43434_1419a4-a5 .kt-btn-wrap-0 .kt-button:focus{color:#ffffff;border-color:#444444;}.wp-block-kadence-advancedbtn.kt-btns43434_1419a4-a5 .kt-btn-wrap-0 .kt-button::before{display:none;}.wp-block-kadence-advancedbtn.kt-btns43434_1419a4-a5 .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns43434_1419a4-a5 .kt-btn-wrap-0 .kt-button:focus{background:#444444;}<\/style>\n<div class=\"wp-block-kadence-advancedbtn kb-buttons-wrap kb-btns43434_1419a4-a5\"><style>ul.menu .wp-block-kadence-advancedbtn .kb-btn43434_3d44d4-7c.kb-button{width:initial;}<\/style><a class=\"kb-button kt-button button kb-btn43434_3d44d4-7c kt-btn-size-standard kt-btn-width-type-full kb-btn-global-fill  kt-btn-has-text-true kt-btn-has-svg-false  wp-block-kadence-singlebtn\" href=\"https:\/\/discover.restek.com\/articles\/evar4286\/pfas-analysis-by-us-epa-method-1633a-for-aqueous-solid-biosolids-and-tissue\"><span class=\"kt-btn-inner-text\">EPA 1633A<\/span><\/a><\/div>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n\n<style>.wp-block-kadence-advancedbtn.kb-btns43434_654482-b5{gap:var(--global-kb-gap-xs, 0.5rem );justify-content:center;align-items:center;}.kt-btns43434_654482-b5 .kt-button{font-weight:normal;font-style:normal;}.kt-btns43434_654482-b5 .kt-btn-wrap-0{margin-right:5px;}.wp-block-kadence-advancedbtn.kt-btns43434_654482-b5 .kt-btn-wrap-0 .kt-button{color:#555555;border-color:#555555;}.wp-block-kadence-advancedbtn.kt-btns43434_654482-b5 .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns43434_654482-b5 .kt-btn-wrap-0 .kt-button:focus{color:#ffffff;border-color:#444444;}.wp-block-kadence-advancedbtn.kt-btns43434_654482-b5 .kt-btn-wrap-0 .kt-button::before{display:none;}.wp-block-kadence-advancedbtn.kt-btns43434_654482-b5 .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns43434_654482-b5 .kt-btn-wrap-0 .kt-button:focus{background:#444444;}<\/style>\n<div class=\"wp-block-kadence-advancedbtn kb-buttons-wrap kb-btns43434_654482-b5\"><style>ul.menu .wp-block-kadence-advancedbtn .kb-btn43434_e5926b-83.kb-button{width:initial;}<\/style><a class=\"kb-button kt-button button kb-btn43434_e5926b-83 kt-btn-size-standard kt-btn-width-type-full kb-btn-global-fill  kt-btn-has-text-true kt-btn-has-svg-false  wp-block-kadence-singlebtn\" href=\"https:\/\/discover.restek.com\/articles\/EVAR4287\/pfas-analysis-by-us-epa-method-otm-45-for-emissions\/\"><span class=\"kt-btn-inner-text\">EPA OTM-45<\/span><\/a><\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n\n<style>.wp-block-kadence-advancedbtn.kb-btns43434_c5ac5a-79{gap:var(--global-kb-gap-xs, 0.5rem );justify-content:center;align-items:center;}.kt-btns43434_c5ac5a-79 .kt-button{font-weight:normal;font-style:normal;}.kt-btns43434_c5ac5a-79 .kt-btn-wrap-0{margin-right:5px;}.wp-block-kadence-advancedbtn.kt-btns43434_c5ac5a-79 .kt-btn-wrap-0 .kt-button{color:#555555;border-color:#555555;}.wp-block-kadence-advancedbtn.kt-btns43434_c5ac5a-79 .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns43434_c5ac5a-79 .kt-btn-wrap-0 .kt-button:focus{color:#ffffff;border-color:#444444;}.wp-block-kadence-advancedbtn.kt-btns43434_c5ac5a-79 .kt-btn-wrap-0 .kt-button::before{display:none;}.wp-block-kadence-advancedbtn.kt-btns43434_c5ac5a-79 .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns43434_c5ac5a-79 .kt-btn-wrap-0 .kt-button:focus{background:#444444;}<\/style>\n<div class=\"wp-block-kadence-advancedbtn kb-buttons-wrap kb-btns43434_c5ac5a-79\"><style>ul.menu .wp-block-kadence-advancedbtn .kb-btn43434_5e898a-68.kb-button{width:initial;}<\/style><a class=\"kb-button kt-button button kb-btn43434_5e898a-68 kt-btn-size-standard kt-btn-width-type-full kb-btn-global-fill  kt-btn-has-text-true kt-btn-has-svg-false  wp-block-kadence-singlebtn\" href=\"https:\/\/discover.restek.com\/articles\/evar4288\/pfas-analysis-supporting-us-epa-rule-ucmr-5-for-drinking-water\"><span class=\"kt-btn-inner-text\">EPA UCMR 5<\/span><\/a><\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n\n<style>.wp-block-kadence-advancedbtn.kb-btns43434_860ac7-a4{gap:var(--global-kb-gap-xs, 0.5rem );justify-content:center;align-items:center;}.kt-btns43434_860ac7-a4 .kt-button{font-weight:normal;font-style:normal;}.kt-btns43434_860ac7-a4 .kt-btn-wrap-0{margin-right:5px;}.wp-block-kadence-advancedbtn.kt-btns43434_860ac7-a4 .kt-btn-wrap-0 .kt-button{color:#555555;border-color:#555555;}.wp-block-kadence-advancedbtn.kt-btns43434_860ac7-a4 .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns43434_860ac7-a4 .kt-btn-wrap-0 .kt-button:focus{color:#ffffff;border-color:#444444;}.wp-block-kadence-advancedbtn.kt-btns43434_860ac7-a4 .kt-btn-wrap-0 .kt-button::before{display:none;}.wp-block-kadence-advancedbtn.kt-btns43434_860ac7-a4 .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns43434_860ac7-a4 .kt-btn-wrap-0 .kt-button:focus{background:#444444;}<\/style>\n<div class=\"wp-block-kadence-advancedbtn kb-buttons-wrap kb-btns43434_860ac7-a4\"><style>ul.menu .wp-block-kadence-advancedbtn .kb-btn43434_d0b1e3-23.kb-button{width:initial;}<\/style><a class=\"kb-button kt-button button kb-btn43434_d0b1e3-23 kt-btn-size-standard kt-btn-width-type-full kb-btn-global-fill  kt-btn-has-text-true kt-btn-has-svg-false  wp-block-kadence-singlebtn\" href=\"https:\/\/discover.restek.com\/articles\/EVAR4289\/pfas-analysis-by-us-epa-method-8327-for-surface-water-groundwater-and-wastewater\/\"><span class=\"kt-btn-inner-text\">EPA 8327<\/span><\/a><\/div>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n\n<style>.wp-block-kadence-advancedbtn.kb-btns43434_41c2ee-03{gap:var(--global-kb-gap-xs, 0.5rem );justify-content:center;align-items:center;}.kt-btns43434_41c2ee-03 .kt-button{font-weight:normal;font-style:normal;}.kt-btns43434_41c2ee-03 .kt-btn-wrap-0{margin-right:5px;}.wp-block-kadence-advancedbtn.kt-btns43434_41c2ee-03 .kt-btn-wrap-0 .kt-button{color:#555555;border-color:#555555;}.wp-block-kadence-advancedbtn.kt-btns43434_41c2ee-03 .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns43434_41c2ee-03 .kt-btn-wrap-0 .kt-button:focus{color:#ffffff;border-color:#444444;}.wp-block-kadence-advancedbtn.kt-btns43434_41c2ee-03 .kt-btn-wrap-0 .kt-button::before{display:none;}.wp-block-kadence-advancedbtn.kt-btns43434_41c2ee-03 .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns43434_41c2ee-03 .kt-btn-wrap-0 .kt-button:focus{background:#444444;}<\/style>\n<div class=\"wp-block-kadence-advancedbtn kb-buttons-wrap kb-btns43434_41c2ee-03\"><style>ul.menu .wp-block-kadence-advancedbtn .kb-btn43434_31ad72-b7.kb-button{width:initial;}<\/style><a class=\"kb-button kt-button button kb-btn43434_31ad72-b7 kt-btn-size-standard kt-btn-width-type-full kb-btn-global-fill  kt-btn-has-text-true kt-btn-has-svg-false  wp-block-kadence-singlebtn\" href=\"https:\/\/discover.restek.com\/articles\/FSAR4290\/pfas-analysis-by-us-usda-clg-pfas-2-04-for-bovine-porcine-poultry-siluriformes-muscle-and-bovine-plasma\/\"><span class=\"kt-btn-inner-text\">USDA CLG-PFAS 2.04<\/span><\/a><\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n\n<style>.wp-block-kadence-advancedbtn.kb-btns43434_e848c0-09{gap:var(--global-kb-gap-xs, 0.5rem );justify-content:center;align-items:center;}.kt-btns43434_e848c0-09 .kt-button{font-weight:normal;font-style:normal;}.kt-btns43434_e848c0-09 .kt-btn-wrap-0{margin-right:5px;}.wp-block-kadence-advancedbtn.kt-btns43434_e848c0-09 .kt-btn-wrap-0 .kt-button{color:#555555;border-color:#555555;}.wp-block-kadence-advancedbtn.kt-btns43434_e848c0-09 .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns43434_e848c0-09 .kt-btn-wrap-0 .kt-button:focus{color:#ffffff;border-color:#444444;}.wp-block-kadence-advancedbtn.kt-btns43434_e848c0-09 .kt-btn-wrap-0 .kt-button::before{display:none;}.wp-block-kadence-advancedbtn.kt-btns43434_e848c0-09 .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns43434_e848c0-09 .kt-btn-wrap-0 .kt-button:focus{background:#444444;}<\/style>\n<div class=\"wp-block-kadence-advancedbtn kb-buttons-wrap kb-btns43434_e848c0-09\"><style>ul.menu .wp-block-kadence-advancedbtn .kb-btn43434_619607-89.kb-button{width:initial;}<\/style><a class=\"kb-button kt-button button kb-btn43434_619607-89 kt-btn-size-standard kt-btn-width-type-full kb-btn-global-fill  kt-btn-has-text-true kt-btn-has-svg-false  wp-block-kadence-singlebtn\" href=\"https:\/\/discover.restek.com\/articles\/CFAR4291\/pfas-analysis-by-cdc-6304-09-for-serum\/\"><span class=\"kt-btn-inner-text\">CDC 6304.09<\/span><\/a><\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n\n<style>.wp-block-kadence-advancedbtn.kb-btns43434_973ab2-64{gap:var(--global-kb-gap-xs, 0.5rem );justify-content:center;align-items:center;}.kt-btns43434_973ab2-64 .kt-button{font-weight:normal;font-style:normal;}.kt-btns43434_973ab2-64 .kt-btn-wrap-0{margin-right:5px;}.wp-block-kadence-advancedbtn.kt-btns43434_973ab2-64 .kt-btn-wrap-0 .kt-button{color:#555555;border-color:#555555;}.wp-block-kadence-advancedbtn.kt-btns43434_973ab2-64 .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns43434_973ab2-64 .kt-btn-wrap-0 .kt-button:focus{color:#ffffff;border-color:#444444;}.wp-block-kadence-advancedbtn.kt-btns43434_973ab2-64 .kt-btn-wrap-0 .kt-button::before{display:none;}.wp-block-kadence-advancedbtn.kt-btns43434_973ab2-64 .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns43434_973ab2-64 .kt-btn-wrap-0 .kt-button:focus{background:#444444;}<\/style>\n<div class=\"wp-block-kadence-advancedbtn kb-buttons-wrap kb-btns43434_973ab2-64\"><style>ul.menu .wp-block-kadence-advancedbtn .kb-btn43434_63ae5d-bb.kb-button{width:initial;}<\/style><a class=\"kb-button kt-button button kb-btn43434_63ae5d-bb kt-btn-size-standard kt-btn-width-type-full kb-btn-global-fill  kt-btn-has-text-true kt-btn-has-svg-false  wp-block-kadence-singlebtn\" href=\"https:\/\/discover.restek.com\/articles\/FSAR4292\/pfas-analysis-by-us-fda-c-010-03-for-food-and-feed\/\"><span class=\"kt-btn-inner-text\">US FDA C-010.03<\/span><\/a><\/div>\n<\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\">UNITED STATES VOLATILE FLUORINATED COMPOUNDS IN AIR METHOD<\/h2>\n\n\n\n<p><\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n\n<style>.wp-block-kadence-advancedbtn.kb-btns43434_85c09f-54{gap:var(--global-kb-gap-xs, 0.5rem );justify-content:center;align-items:center;}.kt-btns43434_85c09f-54 .kt-button{font-weight:normal;font-style:normal;}.kt-btns43434_85c09f-54 .kt-btn-wrap-0{margin-right:5px;}.wp-block-kadence-advancedbtn.kt-btns43434_85c09f-54 .kt-btn-wrap-0 .kt-button{color:#555555;border-color:#555555;}.wp-block-kadence-advancedbtn.kt-btns43434_85c09f-54 .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns43434_85c09f-54 .kt-btn-wrap-0 .kt-button:focus{color:#ffffff;border-color:#444444;}.wp-block-kadence-advancedbtn.kt-btns43434_85c09f-54 .kt-btn-wrap-0 .kt-button::before{display:none;}.wp-block-kadence-advancedbtn.kt-btns43434_85c09f-54 .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns43434_85c09f-54 .kt-btn-wrap-0 .kt-button:focus{background:#444444;}<\/style>\n<div class=\"wp-block-kadence-advancedbtn kb-buttons-wrap kb-btns43434_85c09f-54\"><style>ul.menu .wp-block-kadence-advancedbtn .kb-btn43434_d062a2-65.kb-button{width:initial;}<\/style><a class=\"kb-button kt-button button kb-btn43434_d062a2-65 kt-btn-size-standard kt-btn-width-type-full kb-btn-global-fill  kt-btn-has-text-true kt-btn-has-svg-false  wp-block-kadence-singlebtn\" href=\"https:\/\/discover.restek.com\/articles\/EVAR4331\/vfc-analysis-by-us-epa-method-otm-50-for-emissions\/\"><span class=\"kt-btn-inner-text\">EPA OTM-50<\/span><\/a><\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\">EUROPEAN PFAS TESTING METHODS &amp; GUIDELINES<\/h2>\n\n\n\n<p><\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n\n<style>.wp-block-kadence-advancedbtn.kb-btns43434_f4eaa0-b0{gap:var(--global-kb-gap-xs, 0.5rem );justify-content:center;align-items:center;}.kt-btns43434_f4eaa0-b0 .kt-button{font-weight:normal;font-style:normal;}.kt-btns43434_f4eaa0-b0 .kt-btn-wrap-0{margin-right:5px;}.wp-block-kadence-advancedbtn.kt-btns43434_f4eaa0-b0 .kt-btn-wrap-0 .kt-button{color:#555555;border-color:#555555;}.wp-block-kadence-advancedbtn.kt-btns43434_f4eaa0-b0 .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns43434_f4eaa0-b0 .kt-btn-wrap-0 .kt-button:focus{color:#ffffff;border-color:#444444;}.wp-block-kadence-advancedbtn.kt-btns43434_f4eaa0-b0 .kt-btn-wrap-0 .kt-button::before{display:none;}.wp-block-kadence-advancedbtn.kt-btns43434_f4eaa0-b0 .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns43434_f4eaa0-b0 .kt-btn-wrap-0 .kt-button:focus{background:#444444;}<\/style>\n<div class=\"wp-block-kadence-advancedbtn kb-buttons-wrap kb-btns43434_f4eaa0-b0\"><style>ul.menu .wp-block-kadence-advancedbtn .kb-btn43434_72e08d-04.kb-button{width:initial;}<\/style><a class=\"kb-button kt-button button kb-btn43434_72e08d-04 kt-btn-size-standard kt-btn-width-type-full kb-btn-global-fill  kt-btn-has-text-true kt-btn-has-svg-false  wp-block-kadence-singlebtn\" href=\"https:\/\/discover.restek.com\/articles\/EVAR4298\/pfas-analysis-by-din-en-17892-for-drinking-water\/\"><span class=\"kt-btn-inner-text\">DIN EN 17892<\/span><\/a><\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n\n<style>.wp-block-kadence-advancedbtn.kb-btns43434_2bea8c-e8{gap:var(--global-kb-gap-xs, 0.5rem );justify-content:center;align-items:center;}.kt-btns43434_2bea8c-e8 .kt-button{font-weight:normal;font-style:normal;}.kt-btns43434_2bea8c-e8 .kt-btn-wrap-0{margin-right:5px;}.wp-block-kadence-advancedbtn.kt-btns43434_2bea8c-e8 .kt-btn-wrap-0 .kt-button{color:#555555;border-color:#555555;}.wp-block-kadence-advancedbtn.kt-btns43434_2bea8c-e8 .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns43434_2bea8c-e8 .kt-btn-wrap-0 .kt-button:focus{color:#ffffff;border-color:#444444;}.wp-block-kadence-advancedbtn.kt-btns43434_2bea8c-e8 .kt-btn-wrap-0 .kt-button::before{display:none;}.wp-block-kadence-advancedbtn.kt-btns43434_2bea8c-e8 .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns43434_2bea8c-e8 .kt-btn-wrap-0 .kt-button:focus{background:#444444;}<\/style>\n<div class=\"wp-block-kadence-advancedbtn kb-buttons-wrap kb-btns43434_2bea8c-e8\"><style>ul.menu .wp-block-kadence-advancedbtn .kb-btn43434_663569-b3.kb-button{width:initial;}<\/style><a class=\"kb-button kt-button button kb-btn43434_663569-b3 kt-btn-size-standard kt-btn-width-type-full kb-btn-global-fill  kt-btn-has-text-true kt-btn-has-svg-false  wp-block-kadence-singlebtn\" href=\"https:\/\/discover.restek.com\/articles\/EVAR4299\/pfas-analysis-by-din-38407-42-for-water-wastewater-and-sludge\/\"><span class=\"kt-btn-inner-text\">DIN 38407-42<\/span><\/a><\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n\n<style>.wp-block-kadence-advancedbtn.kb-btns43434_399fb4-19{gap:var(--global-kb-gap-xs, 0.5rem );justify-content:center;align-items:center;}.kt-btns43434_399fb4-19 .kt-button{font-weight:normal;font-style:normal;}.kt-btns43434_399fb4-19 .kt-btn-wrap-0{margin-right:5px;}.wp-block-kadence-advancedbtn.kt-btns43434_399fb4-19 .kt-btn-wrap-0 .kt-button{color:#555555;border-color:#555555;}.wp-block-kadence-advancedbtn.kt-btns43434_399fb4-19 .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns43434_399fb4-19 .kt-btn-wrap-0 .kt-button:focus{color:#ffffff;border-color:#444444;}.wp-block-kadence-advancedbtn.kt-btns43434_399fb4-19 .kt-btn-wrap-0 .kt-button::before{display:none;}.wp-block-kadence-advancedbtn.kt-btns43434_399fb4-19 .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns43434_399fb4-19 .kt-btn-wrap-0 .kt-button:focus{background:#444444;}<\/style>\n<div class=\"wp-block-kadence-advancedbtn kb-buttons-wrap kb-btns43434_399fb4-19\"><style>ul.menu .wp-block-kadence-advancedbtn .kb-btn43434_26fcba-3b.kb-button{width:initial;}<\/style><a class=\"kb-button kt-button button kb-btn43434_26fcba-3b kt-btn-size-standard kt-btn-width-type-full kb-btn-global-fill  kt-btn-has-text-true kt-btn-has-svg-false  wp-block-kadence-singlebtn\" href=\"https:\/\/eur-lex.europa.eu\/eli\/reg\/2023\/915\/oj\" target=\"_blank\" rel=\"noreferrer noopener\"><span class=\"kt-btn-inner-text\">EU 2023\/915<\/span><\/a><\/div>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n\n<style>.wp-block-kadence-advancedbtn.kb-btns43434_4fe772-10{gap:var(--global-kb-gap-xs, 0.5rem );justify-content:center;align-items:center;}.kt-btns43434_4fe772-10 .kt-button{font-weight:normal;font-style:normal;}.kt-btns43434_4fe772-10 .kt-btn-wrap-0{margin-right:5px;}.wp-block-kadence-advancedbtn.kt-btns43434_4fe772-10 .kt-btn-wrap-0 .kt-button{color:#555555;border-color:#555555;}.wp-block-kadence-advancedbtn.kt-btns43434_4fe772-10 .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns43434_4fe772-10 .kt-btn-wrap-0 .kt-button:focus{color:#ffffff;border-color:#444444;}.wp-block-kadence-advancedbtn.kt-btns43434_4fe772-10 .kt-btn-wrap-0 .kt-button::before{display:none;}.wp-block-kadence-advancedbtn.kt-btns43434_4fe772-10 .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns43434_4fe772-10 .kt-btn-wrap-0 .kt-button:focus{background:#444444;}<\/style>\n<div class=\"wp-block-kadence-advancedbtn kb-buttons-wrap kb-btns43434_4fe772-10\"><style>ul.menu .wp-block-kadence-advancedbtn .kb-btn43434_cb13f3-00.kb-button{width:initial;}<\/style><a class=\"kb-button kt-button button kb-btn43434_cb13f3-00 kt-btn-size-standard kt-btn-width-type-full kb-btn-global-fill  kt-btn-has-text-true kt-btn-has-svg-false  wp-block-kadence-singlebtn\" href=\"https:\/\/eur-lex.europa.eu\/legal-content\/EN\/TXT\/?uri=CELEX%3A32022H1431&#038;qid=1707142952576\" target=\"_blank\" rel=\"noreferrer noopener\"><span class=\"kt-btn-inner-text\">EU 2022\/1431<\/span><\/a><\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n\n<style>.wp-block-kadence-advancedbtn.kb-btns43434_4ee839-17{gap:var(--global-kb-gap-xs, 0.5rem );justify-content:center;align-items:center;}.kt-btns43434_4ee839-17 .kt-button{font-weight:normal;font-style:normal;}.kt-btns43434_4ee839-17 .kt-btn-wrap-0{margin-right:5px;}.wp-block-kadence-advancedbtn.kt-btns43434_4ee839-17 .kt-btn-wrap-0 .kt-button{color:#555555;border-color:#555555;}.wp-block-kadence-advancedbtn.kt-btns43434_4ee839-17 .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns43434_4ee839-17 .kt-btn-wrap-0 .kt-button:focus{color:#ffffff;border-color:#444444;}.wp-block-kadence-advancedbtn.kt-btns43434_4ee839-17 .kt-btn-wrap-0 .kt-button::before{display:none;}.wp-block-kadence-advancedbtn.kt-btns43434_4ee839-17 .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns43434_4ee839-17 .kt-btn-wrap-0 .kt-button:focus{background:#444444;}<\/style>\n<div class=\"wp-block-kadence-advancedbtn kb-buttons-wrap kb-btns43434_4ee839-17\"><style>ul.menu .wp-block-kadence-advancedbtn .kb-btn43434_87048a-d8.kb-button{width:initial;}<\/style><a class=\"kb-button kt-button button kb-btn43434_87048a-d8 kt-btn-size-standard kt-btn-width-type-full kb-btn-global-fill  kt-btn-has-text-true kt-btn-has-svg-false  wp-block-kadence-singlebtn\" href=\"https:\/\/eur-lex.europa.eu\/eli\/dir\/2020\/2184\/oj\" target=\"_blank\" rel=\"noreferrer noopener\"><span class=\"kt-btn-inner-text\">EU 2020\/2184<\/span><\/a><\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n\n<style>.wp-block-kadence-advancedbtn.kb-btns43434_c153dd-1a{gap:var(--global-kb-gap-xs, 0.5rem );justify-content:center;align-items:center;}.kt-btns43434_c153dd-1a .kt-button{font-weight:normal;font-style:normal;}.kt-btns43434_c153dd-1a .kt-btn-wrap-0{margin-right:5px;}.wp-block-kadence-advancedbtn.kt-btns43434_c153dd-1a .kt-btn-wrap-0 .kt-button{color:#555555;border-color:#555555;}.wp-block-kadence-advancedbtn.kt-btns43434_c153dd-1a .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns43434_c153dd-1a .kt-btn-wrap-0 .kt-button:focus{color:#ffffff;border-color:#444444;}.wp-block-kadence-advancedbtn.kt-btns43434_c153dd-1a .kt-btn-wrap-0 .kt-button::before{display:none;}.wp-block-kadence-advancedbtn.kt-btns43434_c153dd-1a .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns43434_c153dd-1a .kt-btn-wrap-0 .kt-button:focus{background:#444444;}<\/style>\n<div class=\"wp-block-kadence-advancedbtn kb-buttons-wrap kb-btns43434_c153dd-1a\"><style>ul.menu .wp-block-kadence-advancedbtn .kb-btn43434_c9d1fa-15.kb-button{width:initial;}<\/style><a class=\"kb-button kt-button button kb-btn43434_c9d1fa-15 kt-btn-size-standard kt-btn-width-type-full kb-btn-global-fill  kt-btn-has-text-true kt-btn-has-svg-false  wp-block-kadence-singlebtn\" href=\"https:\/\/eurl-pops.eu\/\" target=\"_blank\" rel=\"noreferrer noopener\"><span class=\"kt-btn-inner-text\">EURL POPs Ver. 1.2<\/span><\/a><\/div>\n<\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\">INTERNATIONAL STANDARDS PFAS TESTING METHODS &amp; GUIDELINES<\/h2>\n\n\n\n<p><\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n\n<style>.wp-block-kadence-advancedbtn.kb-btns43434_93f63f-cf{gap:var(--global-kb-gap-xs, 0.5rem );justify-content:center;align-items:center;}.kt-btns43434_93f63f-cf .kt-button{font-weight:normal;font-style:normal;}.kt-btns43434_93f63f-cf .kt-btn-wrap-0{margin-right:5px;}.wp-block-kadence-advancedbtn.kt-btns43434_93f63f-cf .kt-btn-wrap-0 .kt-button{color:#555555;border-color:#555555;}.wp-block-kadence-advancedbtn.kt-btns43434_93f63f-cf .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns43434_93f63f-cf .kt-btn-wrap-0 .kt-button:focus{color:#ffffff;border-color:#444444;}.wp-block-kadence-advancedbtn.kt-btns43434_93f63f-cf .kt-btn-wrap-0 .kt-button::before{display:none;}.wp-block-kadence-advancedbtn.kt-btns43434_93f63f-cf .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns43434_93f63f-cf .kt-btn-wrap-0 .kt-button:focus{background:#444444;}<\/style>\n<div class=\"wp-block-kadence-advancedbtn kb-buttons-wrap kb-btns43434_93f63f-cf\"><style>ul.menu .wp-block-kadence-advancedbtn .kb-btn43434_be41a4-3a.kb-button{width:initial;}<\/style><a class=\"kb-button kt-button button kb-btn43434_be41a4-3a kt-btn-size-standard kt-btn-width-type-full kb-btn-global-fill  kt-btn-has-text-true kt-btn-has-svg-false  wp-block-kadence-singlebtn\" href=\"https:\/\/discover.restek.com\/articles\/EVAR4300\/pfas-analysis-by-iso-21675-2019-for-water\/\"><span class=\"kt-btn-inner-text\">ISO 21675:2019<\/span><\/a><\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n\n<style>.wp-block-kadence-advancedbtn.kb-btns43434_296bcb-a2{gap:var(--global-kb-gap-xs, 0.5rem );justify-content:center;align-items:center;}.kt-btns43434_296bcb-a2 .kt-button{font-weight:normal;font-style:normal;}.kt-btns43434_296bcb-a2 .kt-btn-wrap-0{margin-right:5px;}.wp-block-kadence-advancedbtn.kt-btns43434_296bcb-a2 .kt-btn-wrap-0 .kt-button{color:#555555;border-color:#555555;}.wp-block-kadence-advancedbtn.kt-btns43434_296bcb-a2 .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns43434_296bcb-a2 .kt-btn-wrap-0 .kt-button:focus{color:#ffffff;border-color:#444444;}.wp-block-kadence-advancedbtn.kt-btns43434_296bcb-a2 .kt-btn-wrap-0 .kt-button::before{display:none;}.wp-block-kadence-advancedbtn.kt-btns43434_296bcb-a2 .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns43434_296bcb-a2 .kt-btn-wrap-0 .kt-button:focus{background:#444444;}<\/style>\n<div class=\"wp-block-kadence-advancedbtn kb-buttons-wrap kb-btns43434_296bcb-a2\"><style>ul.menu .wp-block-kadence-advancedbtn .kb-btn43434_bad103-02.kb-button{width:initial;}<\/style><a class=\"kb-button kt-button button kb-btn43434_bad103-02 kt-btn-size-standard kt-btn-width-type-full kb-btn-global-fill  kt-btn-has-text-true kt-btn-has-svg-false  wp-block-kadence-singlebtn\" href=\"https:\/\/discover.restek.com\/articles\/GNAR4301\/pfas-analysis-by-iso-23702-1-2023-for-leather\/\"><span class=\"kt-btn-inner-text\">ISO 23702-1:2023<\/span><\/a><\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n\n<style>.wp-block-kadence-advancedbtn.kb-btns43434_7110f6-19{gap:var(--global-kb-gap-xs, 0.5rem );justify-content:center;align-items:center;}.kt-btns43434_7110f6-19 .kt-button{font-weight:normal;font-style:normal;}.kt-btns43434_7110f6-19 .kt-btn-wrap-0{margin-right:5px;}.wp-block-kadence-advancedbtn.kt-btns43434_7110f6-19 .kt-btn-wrap-0 .kt-button{color:#555555;border-color:#555555;}.wp-block-kadence-advancedbtn.kt-btns43434_7110f6-19 .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns43434_7110f6-19 .kt-btn-wrap-0 .kt-button:focus{color:#ffffff;border-color:#444444;}.wp-block-kadence-advancedbtn.kt-btns43434_7110f6-19 .kt-btn-wrap-0 .kt-button::before{display:none;}.wp-block-kadence-advancedbtn.kt-btns43434_7110f6-19 .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns43434_7110f6-19 .kt-btn-wrap-0 .kt-button:focus{background:#444444;}<\/style>\n<div class=\"wp-block-kadence-advancedbtn kb-buttons-wrap kb-btns43434_7110f6-19\"><style>ul.menu .wp-block-kadence-advancedbtn .kb-btn43434_ed0fca-77.kb-button{width:initial;}<\/style><a class=\"kb-button kt-button button kb-btn43434_ed0fca-77 kt-btn-size-standard kt-btn-width-type-full kb-btn-global-fill  kt-btn-has-text-true kt-btn-has-svg-false  wp-block-kadence-singlebtn\" href=\"https:\/\/discover.restek.com\/articles\/evar4304\/pfas-analysis-by-astm-d7979-20-for-water-sludge-influent-effluent-and-wastewater\"><span class=\"kt-btn-inner-text\">ASTM D7968-20<\/span><\/a><\/div>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n\n<style>.wp-block-kadence-advancedbtn.kb-btns43434_c8f1b0-08{gap:var(--global-kb-gap-xs, 0.5rem );justify-content:center;align-items:center;}.kt-btns43434_c8f1b0-08 .kt-button{font-weight:normal;font-style:normal;}.kt-btns43434_c8f1b0-08 .kt-btn-wrap-0{margin-right:5px;}.wp-block-kadence-advancedbtn.kt-btns43434_c8f1b0-08 .kt-btn-wrap-0 .kt-button{color:#555555;border-color:#555555;}.wp-block-kadence-advancedbtn.kt-btns43434_c8f1b0-08 .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns43434_c8f1b0-08 .kt-btn-wrap-0 .kt-button:focus{color:#ffffff;border-color:#444444;}.wp-block-kadence-advancedbtn.kt-btns43434_c8f1b0-08 .kt-btn-wrap-0 .kt-button::before{display:none;}.wp-block-kadence-advancedbtn.kt-btns43434_c8f1b0-08 .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns43434_c8f1b0-08 .kt-btn-wrap-0 .kt-button:focus{background:#444444;}<\/style>\n<div class=\"wp-block-kadence-advancedbtn kb-buttons-wrap kb-btns43434_c8f1b0-08\"><style>ul.menu .wp-block-kadence-advancedbtn .kb-btn43434_d8d5d7-07.kb-button{width:initial;}<\/style><a class=\"kb-button kt-button button kb-btn43434_d8d5d7-07 kt-btn-size-standard kt-btn-width-type-full kb-btn-global-fill  kt-btn-has-text-true kt-btn-has-svg-false  wp-block-kadence-singlebtn\" href=\"https:\/\/discover.restek.com\/articles\/EVAR4303\/pfas-analysis-by-astm-d7968-23-for-soil\/\"><span class=\"kt-btn-inner-text\">ASTM D7979-23<\/span><\/a><\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n\n<style>.wp-block-kadence-advancedbtn.kb-btns43434_0e5340-d5{gap:var(--global-kb-gap-xs, 0.5rem );justify-content:center;align-items:center;}.kt-btns43434_0e5340-d5 .kt-button{font-weight:normal;font-style:normal;}.kt-btns43434_0e5340-d5 .kt-btn-wrap-0{margin-right:5px;}.wp-block-kadence-advancedbtn.kt-btns43434_0e5340-d5 .kt-btn-wrap-0 .kt-button{color:#555555;border-color:#555555;}.wp-block-kadence-advancedbtn.kt-btns43434_0e5340-d5 .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns43434_0e5340-d5 .kt-btn-wrap-0 .kt-button:focus{color:#ffffff;border-color:#444444;}.wp-block-kadence-advancedbtn.kt-btns43434_0e5340-d5 .kt-btn-wrap-0 .kt-button::before{display:none;}.wp-block-kadence-advancedbtn.kt-btns43434_0e5340-d5 .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns43434_0e5340-d5 .kt-btn-wrap-0 .kt-button:focus{background:#444444;}<\/style>\n<div class=\"wp-block-kadence-advancedbtn kb-buttons-wrap kb-btns43434_0e5340-d5\"><style>ul.menu .wp-block-kadence-advancedbtn .kb-btn43434_606ac1-1d.kb-button{width:initial;}<\/style><a class=\"kb-button kt-button button kb-btn43434_606ac1-1d kt-btn-size-standard kt-btn-width-type-full kb-btn-global-fill  kt-btn-has-text-true kt-btn-has-svg-false  wp-block-kadence-singlebtn\" href=\"https:\/\/discover.restek.com\/articles\/EVAR4305\/pfas-analysis-by-astm-d8421-22-for-aqueous-samples\/\"><span class=\"kt-btn-inner-text\">ASTM D8421-22<\/span><\/a><\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n\n<style>.wp-block-kadence-advancedbtn.kb-btns43434_baafd6-cb{gap:var(--global-kb-gap-xs, 0.5rem );justify-content:center;align-items:center;}.kt-btns43434_baafd6-cb .kt-button{font-weight:normal;font-style:normal;}.kt-btns43434_baafd6-cb .kt-btn-wrap-0{margin-right:5px;}.wp-block-kadence-advancedbtn.kt-btns43434_baafd6-cb .kt-btn-wrap-0 .kt-button{color:#555555;border-color:#555555;}.wp-block-kadence-advancedbtn.kt-btns43434_baafd6-cb .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns43434_baafd6-cb .kt-btn-wrap-0 .kt-button:focus{color:#ffffff;border-color:#444444;}.wp-block-kadence-advancedbtn.kt-btns43434_baafd6-cb .kt-btn-wrap-0 .kt-button::before{display:none;}.wp-block-kadence-advancedbtn.kt-btns43434_baafd6-cb .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns43434_baafd6-cb .kt-btn-wrap-0 .kt-button:focus{background:#444444;}<\/style>\n<div class=\"wp-block-kadence-advancedbtn kb-buttons-wrap kb-btns43434_baafd6-cb\"><style>ul.menu .wp-block-kadence-advancedbtn .kb-btn43434_b6b589-54.kb-button{width:initial;}<\/style><a class=\"kb-button kt-button button kb-btn43434_b6b589-54 kt-btn-size-standard kt-btn-width-type-full kb-btn-global-fill  kt-btn-has-text-true kt-btn-has-svg-false  wp-block-kadence-singlebtn\" href=\"https:\/\/www.aoac.org\/resources\/aoac-smpr-2023-003\/\" target=\"_blank\" rel=\"noreferrer noopener\"><span class=\"kt-btn-inner-text\">AOAC SMPR 2023.003<\/span><\/a><\/div>\n<\/div>\n<\/div>\n\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Other Methods and Guidelines&nbsp;<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Restek Corporation, Your partner in pfas analysis, Technical article, GNLP4243A-UNV, 2024. <a href=\"https:\/\/discover.restek.com\/pfas-analysis\/\">https:\/\/www.restek.com\/pfas<\/a><\/li>\n\n\n\n<li>U.S. Department of Defense and U.S. Department of Energy, DoD\/DOE quality systems manual for environmental laboratories (QSM), Version 6.0, December 13, 2023. <a href=\"https:\/\/www.denix.osd.mil\/edqw\/denix-files\/sites\/43\/2024\/01\/QSM-Version-6.0-FINAL-Dec-13-2023.pdf\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/www.denix.osd.mil\/edqw\/denix-files\/sites\/43\/2024\/01\/QSM-Version-6.0-FINAL-Dec-13-2023.pdf<\/a><\/li>\n\n\n\n<li>U.S. Department of Defense, DoD AFFF01 Determination of perfluorooctanoic acid and perfluorooctanesulfonic acid in aqueous film forming foam (AFFF) for demonstration of compliance to MIL-PRF-24385, Rev 1.0, December 10, 2021. &nbsp; <a href=\"https:\/\/www.denix.osd.mil\/edqw\/denix-files\/sites\/43\/2021\/12\/DoD-AFFF01-Rev-1.0-dtd-7-Dec-2021-1.pdf\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/www.denix.osd.mil\/edqw\/denix-files\/sites\/43\/2021\/12\/DoD-AFFF01-Rev-1.0-dtd-7-Dec-2021-1.pdf<\/a><\/li>\n\n\n\n<li>U.S. Environmental Protection Agency, EPA 1621 Determination of adsorbable organic fluorine (AOF) in aqueous matrices by combustion ion chromatography (CIC), January 2024. <a href=\"https:\/\/www.epa.gov\/system\/files\/documents\/2024-01\/method-1621-for-web-posting.pdf\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/www.epa.gov\/system\/files\/documents\/2024-01\/method-1621-for-web-posting.pdf<\/a><\/li>\n\n\n\n<li>Michigan Department of Environment, Great Lakes, and Energy (EGLE), General PFAS sampling guidance, January 2024. <a href=\"https:\/\/www.michigan.gov\/pfasresponse\/-\/media\/Project\/Websites\/PFAS-Response\/Sampling-Guidance\/General.pdf?rev=6217442052bf4fedb89bbf786560d645\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/www.michigan.gov\/pfasresponse\/-\/media\/Project\/Websites\/PFAS-Response\/Sampling-Guidance\/General.pdf?rev=6217442052bf4fedb89bbf786560d645<\/a><\/li>\n<\/ol>\n\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n<style>.kt-img-overlay43434_aca418-99 .kt-image-overlay-wrap{max-width:770px;overflow:hidden;}.kt-img-overlay43434_aca418-99 .kt-image-overlay-wrap 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2rem);font-weight:regular;font-style:normal;}.kt-img-overlay43434_aca418-99 .kt-image-overlay-divider{border-top-color:#fff;border-top-width:1px;width:80%;border-top-style:none;}.wp-block-kadence-imageoverlay.kt-img-overlay43434_aca418-99 .kt-image-overlay-message .image-overlay-subtitle{color:#fff;background:rgba(0, 0, 0, 0);padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font-size:var(--global-kb-font-size-sm, 0.9rem);font-weight:regular;font-style:normal;}@media all and (max-width: 1024px){.kt-img-overlay43434_aca418-99 .kt-image-overlay-wrap{max-width:770px;}}@media all and (max-width: 1024px){.kt-img-overlay43434_aca418-99 .kt-image-overlay-message{border-top:0px solid rgba(255,255,255,0.8);border-right:0px solid rgba(255,255,255,0.8);border-bottom:0px solid rgba(255,255,255,0.8);border-left:0px solid rgba(255,255,255,0.8);}}@media all and (max-width: 767px){.kt-img-overlay43434_aca418-99 .kt-image-overlay-wrap{max-width:770px;}.kt-img-overlay43434_aca418-99 .kt-image-overlay-message{border-top:0px solid rgba(255,255,255,0.8);border-right:0px solid rgba(255,255,255,0.8);border-bottom:0px solid rgba(255,255,255,0.8);border-left:0px solid rgba(255,255,255,0.8);}}<\/style>\n<div class=\"kt-img-overlay43434_aca418-99 aligncenter wp-block-kadence-imageoverlay\"><div class=\"kt-image-overlay-wrap kt-over-image-zoomin\"><div class=\"kt-block-intrisic\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/discover.restek.com\/wp-content\/uploads\/figure-article-EVAR3498E-PFAS-Ad-02.jpg\" alt=\"\" width=\"770\" height=\"259\" class=\"kt-img-overlay wp-image-19629\" title=\"-\" srcset=\"https:\/\/discover.restek.com\/wp-content\/uploads\/figure-article-EVAR3498E-PFAS-Ad-02.jpg 770w, https:\/\/discover.restek.com\/wp-content\/uploads\/figure-article-EVAR3498E-PFAS-Ad-02-300x101.jpg 300w, https:\/\/discover.restek.com\/wp-content\/uploads\/figure-article-EVAR3498E-PFAS-Ad-02-768x258.jpg 768w\" sizes=\"auto, (max-width: 770px) 100vw, 770px\" \/><div class=\"kt-image-overlay-color-wrapper\"><div class=\"kt-image-overlay-color\"><\/div><\/div><a href=\"www.restek.com\/PFAS\" title=\"www.restek.com\/PFAS\" class=\"kt-imageoverlay-link\"><div class=\"kt-image-overlay-message kt-over-substyle-visible kt-over-valign-center kt-over-halign-left\"><div class=\"kt-image-overlay-inner\"><h2 class=\"image-overlay-title\" tabindex=\"0\">Discover more solutions <br>for PFAS analysis at <br>www.restek.com\/PFAS!<\/h2><\/div><\/div><\/a><\/div><\/div><\/div>\n\n\n\n<div style=\"height:100px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Use this summary of current PFAS testing methods and guidelines from around the world to find the right approach for your analyte lists and sample matrices.<\/p>\n","protected":false},"author":11,"featured_media":6619,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_kad_blocks_custom_css":"","_kad_blocks_head_custom_js":"","_kad_blocks_body_custom_js":"","_kad_blocks_footer_custom_js":"","_kadence_starter_templates_imported_post":false,"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"footnotes":""},"categories":[7],"tags":[2782],"industries-application":[2162,2153,2163,2161,2167,2169,2165,2668,2166],"post-badge":[],"resource-type":[],"product-library":[],"resource-technique":[],"hf_cat_post":[650],"ppma_author":[414],"class_list":["post-43434","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-articles","tag-pfas","industries-application-air-monitoring","industries-application-clinical","industries-application-drinking-water-wastewater-testing","industries-application-environmental","industries-application-food-beverage","industries-application-food-safety","industries-application-pfas-testing","industries-application-semivolatiles","industries-application-soil-sediment-biota-testing"],"acf":[],"taxonomy_info":{"category":[{"value":7,"label":"Articles"}],"post_tag":[{"value":2782,"label":"PFAS"}],"industries-application":[{"value":2162,"label":"Air 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