{"id":43797,"date":"2020-12-22T23:00:00","date_gmt":"2020-12-22T23:00:00","guid":{"rendered":"https:\/\/discover.restek.com\/uncategorized\/rxi-624sil-ms-columnsexceptionally-inert-low-bleed-columns-for-volatiles-analysis\/"},"modified":"2026-01-03T15:32:07","modified_gmt":"2026-01-03T15:32:07","slug":"rxi-624sil-ms-columnsexceptionally-inert-low-bleed-columns-for-volatiles-analysis","status":"publish","type":"post","link":"https:\/\/discover.restek.com\/it\/articles\/gnss1334\/rxi-624sil-ms-columnsexceptionally-inert-low-bleed-columns-for-volatiles-analysis","title":{"rendered":"Rxi-624Sil MS Columns"},"content":{"rendered":"\n<ul class=\"wp-block-list\">\n<li><strong>Optimized selectivity<\/strong> for volatiles and polar compounds ensures good separations.<\/li>\n\n\n\n<li><strong>Highly inert columns<\/strong> improve accuracy and allow lower detection limits, even for active compounds.<\/li>\n\n\n\n<li><strong>Most thermally stable<\/strong> 624 column available up to 320 \u00b0C; low bleed, fully MS compatible.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Increase Confidence in Data Accuracy<\/h2>\n\n\n\n<p>While midpolarity 624 columns are widely used for analyzing polar analytes and volatile organic compounds (VOCs), not all columns combine&nbsp;the selectivity needed for critical separations with the high inertness and low bleed that can further improve data quality. Whether you are&nbsp;developing methods for residual solvents, analyzing environmental VOCs, or running other applications for volatile organics, you can improve&nbsp;data quality with Rxi-624Sil MS columns. These columns incorporate an optimized stationary phase chemistry, unique column deactivation,&nbsp;and tightly controlled manufacturing process that is specifically designed to provide the high inertness and thermal stability needed for&nbsp;greater accuracy and lower detection limits. The unique selectivity, inertness, and thermal stability of the Rxi-624Sil MS column make it ideal&nbsp;for numerous applications, from detecting impurities in pharmaceuticals to monitoring environmental VOCs.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Exceptional Inertness Provides Better Peak Shape, Higher Sensitivity, and More Accurate Data<\/h3>\n\n\n\n<p>Column inertness is difficult to achieve but critical to improving data quality. The deactivation process used for Rxi-624Sil MS columns yields&nbsp;a fully passivated surface that is demonstrably more inert than other 624-type columns. Comprehensive deactivation results in higher&nbsp;responses, more symmetrical peaks, and easy, accurate integration, even for active compounds at low levels (Figures 1 and 2). Rxi-624Sil MS&nbsp;columns, with their superior deactivation, provide the inertness needed for improved linearity, greater accuracy, and lower detection limits.<\/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>\u00a0Highly inert Rxi-624Sil MS columns provide better peak shape and simplify integration for active compounds at low\u00a0levels (5 ng on-column).<\/div><div class='chromatogram-article-inner-full'><div class=\"chromatogram-article-inner\">\n\n<h4 class=\"wp-block-heading has-text-color has-link-color wp-elements-acf07792d4a335483673d8b5f3ea7203\" style=\"color:#0082c5\">Highly inert Rxi-624Sil MS columns&nbsp;give excellent peak symmetry.<\/h4>\n\n\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\/gc_ph1162.png\" alt=\"Inertness Comparison (Basic Compounds): Primary, Secondary, and Tertiary Amines on Rxi-624Sil MS\" title=\"-\"><\/div><p class=\"article-id\" style=\"text-align:center\"> GC_PH1162<\/p><div class=\"chromatogram-peaks\"><h4>Peaks<\/h4><table class=\"peaks col-lg-4 col-12\">\n<thead><tr><th><\/th><th style=\"text-align: left;width: 75px\">Peaks<\/th><th style=\"text-align: center;width: 50px\">Conc.<br \/>(\u00b5g\/mL)<\/th><\/tr><\/thead>\n<tbody><tr><td class=\"num\">1.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Isopropylamine\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/75-31-0\/Isopropylamine\" target=\"_blank\" rel=\"noopener\">Isopropylamine<\/a><\/td><td class=\"oth\">100<\/td><\/tr>\n<tr><td class=\"num\">2.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Diethylamine\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/109-89-7\/Diethylamine\" target=\"_blank\" rel=\"noopener\">Diethylamine<\/a><\/td><td class=\"oth\">100<\/td><\/tr>\n<tr><td class=\"num\">3.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Triethylamine\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/121-44-8\/Triethylamine\" target=\"_blank\" rel=\"noopener\">Triethylamine<\/a><\/td><td class=\"oth\">100<\/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>Rxi-624Sil MS, 30 m, 0.32 mm ID, 1.8 \u00b5m (<a target=\"_blank\" href=\"https:\/\/www.restek.com\/p\/13870?utm_source=chromatograms&amp;utm_medium=link&amp;utm_campaign=GC_PH1162\" rel=\"noopener\">cat.# 13870<\/a>)<\/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>DMSO<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Conc.:<\/th><td>100 \u00b5g\/mL<\/td><\/tr><tr class=\"cgram_header_row\"><th class=\"conditions_header\" scope=\"row\">Injection<\/th><td><\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Inj. Vol.:<\/th><td>1 \u00b5L split (split ratio 20:1)<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Liner:<\/th><td>5 mm Single taper with wool (<a target=\"_blank\" href=\"https:\/\/www.restek.com\/p\/22974-207?utm_source=chromatograms&amp;utm_medium=link&amp;utm_campaign=GC_PH1162\" rel=\"noopener\">cat.# 22974-207<\/a>)<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Inj. Temp.:<\/th><td>250 \u00b0C<\/td><\/tr><tr class=\"cgram_header_row\"><th class=\"conditions_header\" scope=\"row\" colspan=\"2\">Oven<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Oven Temp.:<\/th><td>50 &#176;C (hold 1 min) to 200 &#176;C at 20 &#176;C\/min (hold 5 min)<\/td><\/tr><tr class=\"cgram_header_row\"><th class=\"conditions_header\" scope=\"row\">Carrier Gas<\/th><td>He, constant flow<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Linear Velocity:<\/th><td>37 cm\/sec<\/td><\/tr><\/table><table class=\"conditions col-lg-6 col-12\"><tr><th class=\"conditions_header\" scope=\"row\">Detector<\/th><td>FID @ 250 \u00b0C<\/td><\/tr><tr class=\"cgram_header_row\"><th class=\"conditions_header\" scope=\"row\">Instrument<\/th><td>Agilent\/HP6890  GC<\/td><\/tr><\/table><\/div><\/div><\/div><div class=\"chromatogram-pdf-link\"><a href=\"https:\/\/ez.restek.com\/images\/cgram\/gc_ph1162.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<div class=\"wp-block-custom-chromatogram-article-top\"><div class=\"chromatogram-article-placeholder\"><div class=\"figure-heading\"><strong>Figure 2:<\/strong>\u00a0Active compounds like isopropylamine can be more accurately integrated on an Rxi-624Sil MS column, lowering limits of quantification (LOQs) and increasing data accuracy.<\/div><div class='chromatogram-article-inner-full'><div class=\"chromatogram-article-inner\">\n\n<p>Same conditions as Figure 1.<\/p>\n\n\n\n<h5 class=\"wp-block-heading\">Rxi-624Sil MS<\/h5>\n\n\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\/gc_ph1163.png\" alt=\"Calibration: Isopropylamine (5-100 ng on-column) on Rxi-624Sil MS\" title=\"-\"><\/div><p class=\"article-id\" style=\"text-align:center\"> GC_PH1163<\/p><div class=\"chromatogram-pdf-link\"><a href=\"https:\/\/ez.restek.com\/images\/cgram\/gc_ph1163.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\n\n<h4 class=\"wp-block-heading has-text-align-left has-text-align-center has-text-color has-link-color wp-elements-f3abd781bc4a848122b8290c698011e6\" style=\"color:#0082c5\">Improve sensitivity and confidence in data accuracy with an Rxi-624Sil MS column.<\/h4>\n\n\n\n<h5 class=\"wp-block-heading\">ZB-624<\/h5>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"686\" src=\"https:\/\/discover.restek.com\/wp-content\/uploads\/article-figure-gnss1334b-02a-1024x686.png\" alt=\"\" class=\"wp-image-12160\" title=\"-\" srcset=\"https:\/\/discover.restek.com\/wp-content\/uploads\/article-figure-gnss1334b-02a-1024x686.png 1024w, https:\/\/discover.restek.com\/wp-content\/uploads\/article-figure-gnss1334b-02a-300x201.png 300w, https:\/\/discover.restek.com\/wp-content\/uploads\/article-figure-gnss1334b-02a-768x515.png 768w, https:\/\/discover.restek.com\/wp-content\/uploads\/article-figure-gnss1334b-02a-1536x1029.png 1536w, https:\/\/discover.restek.com\/wp-content\/uploads\/article-figure-gnss1334b-02a.png 2000w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n<\/div><\/div><\/div>\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">Lowest Bleed 624 Available\u2014Assured GC-MS Compatibility<\/h3>\n\n\n\n<p>In addition to providing greater inertness and more accurate results for active compounds, the Rxi-624Sil MS column offers higher temperature&nbsp;stability than any other column in its class (Table I, Figure 3). Even though most 624 columns provide adequate selectivity for polar&nbsp;compounds, poor thermal stability results in stationary phase bleed that can reduce column lifetime, decrease detector sensitivity, and interfere&nbsp;with the quantification of later eluting compounds. The highly effective stationary phase bonding chemistry of the Rxi-624Sil MS column&nbsp;ensures extremely low bleed up to 320 \u00b0C. While other 624 columns generate too much bleed to be useful for continuous mass spectrometry&nbsp;work, the Rxi-624Sil MS column is fully compatible with both quadrupole and ion trap mass spectrometers. In addition to MS compatibility,&nbsp;higher thermal stability results in more stable baselines, longer column lifetimes, and improved method reproducibility.<\/p>\n\n\n\n<p><strong>Table I:<\/strong> The Rxi-624Sil MS column has the highest thermal stability of any 624 column.<\/p>\n\n\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\" style=\"text-align: center;\">\n<tbody>\n<tr>\n<td><strong>Column<\/strong><\/td>\n<td><strong>Manufacturer<\/strong><\/td>\n<td><strong>Maximum Programmable Temperature<\/strong><\/td>\n<\/tr>\n<tr>\n<td style=\"color: #0082c5;\">Rxi-624Sil MS<\/td>\n<td style=\"color: #0082c5;\">Restek<\/td>\n<td style=\"color: #0082c5;\">320 \u00baC<\/td>\n<\/tr>\n<tr>\n<td>VF-624ms<\/td>\n<td>Varian<\/td>\n<td>300 \u00baC<\/td>\n<\/tr>\n<tr>\n<td>DB-624<\/td>\n<td>Agilent J&amp;W<\/td>\n<td>260 \u00baC<\/td>\n<\/tr>\n<tr>\n<td>ZB-624<\/td>\n<td>Phenomenex<\/td>\n<td>260 \u00baC<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/figure>\n\n\n<p class=\"has-small-font-size\">Data obtained from company website or literature for a 30 m x 0.25 mm x 1.4 \u03bcm df column.<\/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>\u00a0The Rxi-624Sil MS column has the lowest bleed of any column in its class and provides true GC-MS capability.<\/div><div class='chromatogram-article-inner-full'><div class=\"chromatogram-article-inner\">\n\n<h4 class=\"wp-block-heading has-text-color has-link-color wp-elements-2695d6e8e5eb08114f645609b0663727\" style=\"color:#0082c5\">High thermal stability Rxi-624Sil MS columns offer:<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Longer column lifetime.<\/li>\n\n\n\n<li>Improved method reproducibility.<\/li>\n\n\n\n<li>GC-MS compatibility.<\/li>\n\n\n\n<li>Stable baseline.<\/li>\n<\/ul>\n\n\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\/gc_gn1147.png\" alt=\"Bleed Comparison of Rxi-624Sil MS and VF-624ms\" title=\"-\"><\/div><p class=\"article-id\" style=\"text-align:center\"> GC_GN1147<\/p><div class=\"chromatogram-peaks\"><h4>Peaks<\/h4><table class=\"peaks col-lg-4 col-12\">\n<thead><tr><th><\/th><th style=\"text-align: left;width: 75px\">Peaks<\/th><\/tr><\/thead>\n<tbody><tr><td class=\"num\">1.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Fluorobenzene\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/462-06-6\/Fluorobenzene\" target=\"_blank\" rel=\"noopener\">Fluorobenzene<\/a><\/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>Rxi-624Sil MS (see notes), 30 m, 0.25 mm ID, 1.4 \u00b5m (<a target=\"_blank\" href=\"https:\/\/www.restek.com\/p\/13868?utm_source=chromatograms&amp;utm_medium=link&amp;utm_campaign=GC_GN1147\" rel=\"noopener\">cat.# 13868<\/a>)<\/td><\/tr><tr class=\"cgram_header_row\"><th class=\"conditions_header\" scope=\"row\">Standard\/Sample<\/th><td>Fluorobenzene (<a target=\"_blank\" href=\"https:\/\/www.restek.com\/p\/30030?utm_source=chromatograms&amp;utm_medium=link&amp;utm_campaign=GC_GN1147\" rel=\"noopener\">cat.# 30030<\/a>)<\/td><\/tr><tr><td><\/td><\/td><\/tr>\n<tr><th class=\"sub conditions_header\" scope=\"row\">Diluent:<\/th><td>Methanol<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Conc.:<\/th><td>200 \u00b5g\/mL<\/td><\/tr><tr class=\"cgram_header_row\"><th class=\"conditions_header\" scope=\"row\">Injection<\/th><td><\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Inj. Vol.:<\/th><td>1 \u00b5L split (split ratio 20:1)<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Liner:<\/th><td>4 mm Split liner with wool<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Inj. Temp.:<\/th><td>220 \u00b0C<\/td><\/tr><tr class=\"cgram_header_row\"><th class=\"conditions_header\" scope=\"row\" colspan=\"2\">Oven<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Oven Temp.:<\/th><td>40 &#176;C (hold 5 min) to 60 &#176;C at 20 &#176;C\/min (hold 5 min) to 120 &#176;C at 20 &#176;C\/min (hold 5 min) to 200 &#176;C at 20 &#176;C\/min (hold 10 min) to 260 &#176;C at 20 &#176;C\/min (hold 10 min) to 300 &#176;C at 20 &#176;C\/min (hold 20 min)<\/td><\/tr><tr class=\"cgram_header_row\"><th class=\"conditions_header\" scope=\"row\">Carrier Gas<\/th><td>He, constant flow<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Linear Velocity:<\/th><td>40 cm\/sec<\/td><\/tr><\/table><table class=\"conditions col-lg-6 col-12\"><tr><th class=\"conditions_header\" scope=\"row\">Detector<\/th><td>FID @ 250 \u00b0C<\/td><\/tr><tr class=\"cgram_header_row\"><th class=\"conditions_header\" scope=\"row\">Instrument<\/th><td>Agilent\/HP6890  GC<\/td><\/tr><tr class=\"cgram_header_row\"><th class=\"conditions_header\" scope=\"row\">Notes<\/th><td>Liner cat.# 20781 was used to produce this chromatogram, but it has since been discontinued. We recommend cat.# 20782 [or cat.# 23300] as an alternative. For assistance choosing a replacement for this application, contact Restek Technical Service or your local Restek representative.<br \/>&#8211; &#8211; &#8211; &#8211; &#8211; &#8211;<br \/>Columns are of equivalent dimensions and were tested after equivalent conditioning.<\/td><\/tr><\/table><\/div><\/div><\/div><div class=\"chromatogram-pdf-link\"><a href=\"https:\/\/ez.restek.com\/images\/cgram\/gc_gn1147.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:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Assure Reliable Separation of Volatile Impurities in&nbsp;Pharmaceuticals<\/h2>\n\n\n\n<p>In the pharmaceutical industry, timing and certainty are everything. Time-to-market is a key driver for new drugs, and efficient batch testing&nbsp;is critical for releasing approved products. Whether developing new methods or conducting routine analysis, increasing productivity&nbsp;depends on choosing the right column for the application. Rxi-624Sil MS columns provide enhanced retention of polar compounds and volatile&nbsp;analytes, as well as full MS compatibility, making them the best choice for many drug analyses.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Fast, Effective Method Development<\/h3>\n\n\n\n<p>Often, 1- and 5-type columns are used initially for GC-MS method development because of their thermal stability; however, their nonpolar&nbsp;character results in poor retention for polar compounds, which increases method development time. In contrast, effective methods can be&nbsp;developed quickly on midpolarity Rxi-624Sil MS columns because they provide greater retention and selectivity for polar compounds as well&nbsp;as good thermal stability. For example, highly volatile, polar alkyl halide genotoxic impurities are difficult to retain on 1s and 5s, but Rxi-624Sil&nbsp;MS columns provide the retention needed to ensure adequate separation (Figure 4). Increased retention makes GC-MS analysis easier to&nbsp;control and ultimately allows faster method development.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Improving Results for Routine Analysis<\/h3>\n\n\n\n<p>Once a drug is approved, fast, reliable methods are needed for routine batch analysis. Establishing system suitability is an important part&nbsp;of these procedures and a major factor in overall lab productivity. Rxi-624Sil MS columns provide the optimized selectivity and guaranteed&nbsp;reproducibility needed to increase pass rates. For example, batch throughput can be improved for residual solvent testing under USP &lt;467&gt;&nbsp;by using a column that provides increased resolution for system suitability components (Figure 5). Greater resolution of critical pairs means&nbsp;higher system suitability pass rates, which allows more batches to be analyzed per shift.<\/p>\n\n\n\n<p>Optimized phase chemistry, complete column deactivation, and tightly-controlled manufacturing make Rxi-624Sil MS columns the best&nbsp;choice for many pharmaceutical applications. With better retention of polar volatiles, lower bleed, and higher inertness, Rxi-624Sil MS&nbsp;columns can improve lab productivity by allowing new methods to be developed quickly and routine applications to be run more reliably.<\/p>\n\n\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\" style=\"background-color: #f0f9ff; border-style: none;\" cellpadding=\"35px\">\n<tbody>\n<tr align=\"center\">\n<td style=\"padding: 20px;\"><span style=\"font-size: 20px; color: #0082c5; font-weight: 600;\">TECH TIP!<\/span><\/td>\n<td>\u00a0<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 20px;\" align=\"center\"><img decoding=\"async\" src=\"https:\/\/discover.restek.com\/wp-content\/uploads\/article-techtip-gnss1334b-01.jpg\" alt=\"\" title=\"-\"><br \/><span style=\"font-size: .625rem;\">Tim Herring, Technical Service Specialist<\/span><\/td>\n<td style=\"vertical-align: top; padding: 20px;\">\n<p>Resolution passes USP &lt;467&gt; criteria when using a 1 mm liner (red line) but fails if a 4 mm liner is used (black line).<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"vertical-align: top; padding: 20px;\">\n<p>When running USP &lt;467&gt; by headspace, using a smaller bore liner (1 mm) can improve system suitability pass rates. Larger bore liners (4 mm) are used with direct liquid injection because the sample is vaporized in the injection port, and the liner must be able to accommodate the solvent expansion volume. In contrast, in headspace analysis, the sample is vaporized in a vial instead of the injection port, so a large volume liner is not needed, and, in fact, it can be deleterious. In headspace methods, using a smaller bore liner reduces band broadening by increasing linear velocity, allowing faster sample transfer and improving resolution.<\/p>\n<\/td>\n<td style=\"padding: 20px;\"><img decoding=\"async\" src=\"https:\/\/discover.restek.com\/wp-content\/uploads\/gc_ph00912.png\" alt=\"\" title=\"-\"><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/figure>\n\n<div class=\"wp-block-custom-chromatogram-article-top\"><div class=\"chromatogram-article-placeholder\"><div class=\"figure-heading\"><strong>Figure 4:<\/strong>\u00a0Polar compounds, such as alkyl halides, are highly retained on midpolarity Rxi-624Sil MS columns, making method development faster and easier than on a nonpolar 1- or 5-type column.<\/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\/gc_ph1166.png\" alt=\"Alkyl Halide Genotoxic Impurities on Rxi-624Sil MS (High Concentration Injection)\" title=\"-\"><\/div><p class=\"article-id\" style=\"text-align:center\"> GC_PH1166<\/p><div class=\"chromatogram-peaks\"><h4>Peaks<\/h4><table class=\"peaks col-lg-4 col-12\">\n<thead><tr><th><\/th><th style=\"text-align: left;width: 75px\">Peaks<\/th><th style=\"text-align: center;width: 50px\">t<sub>R<\/sub> (min)<\/th><\/tr><\/thead>\n<tbody><tr><td class=\"num\">1.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for 2-Chloropropane\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/75-29-6\/2-Chloropropane\" target=\"_blank\" rel=\"noopener\">2-Chloropropane<\/a><\/td><td class=\"oth\">2.10<\/td><\/tr>\n<tr><td class=\"num\">2.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Bromoethane\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/74-96-4\/Bromoethane\" target=\"_blank\" rel=\"noopener\">Bromoethane<\/a><\/td><td class=\"oth\">2.36<\/td><\/tr>\n<tr><td class=\"num\">3.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for 1-Chloropropane\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/540-54-5\/1-Chloropropane\" target=\"_blank\" rel=\"noopener\">1-Chloropropane<\/a><\/td><td class=\"oth\">2.72<\/td><\/tr>\n<tr><td class=\"num\">4.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for 2-Bromopropane\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/75-26-3\/2-Bromopropane\" target=\"_blank\" rel=\"noopener\">2-Bromopropane<\/a><\/td><td class=\"oth\">3.393<\/td><\/tr>\n<tr><td class=\"num\">5.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Butyl chloride\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/109-69-3\/Butyl chloride\" target=\"_blank\" rel=\"noopener\">Butyl chloride<\/a><\/td><td class=\"oth\">4.627<\/td><\/tr>\n<tr><td class=\"num\">6.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for 1-Bromobutane\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/109-65-9\/1-Bromobutane\" target=\"_blank\" rel=\"noopener\">1-Bromobutane<\/a><\/td><td class=\"oth\">5.973<\/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>Rxi-624Sil MS, 20 m, 0.18 mm ID, 1.00 \u00b5m (<a target=\"_blank\" href=\"https:\/\/www.restek.com\/p\/13865?utm_source=chromatograms&amp;utm_medium=link&amp;utm_campaign=GC_PH1166\" rel=\"noopener\">cat.# 13865<\/a>)<\/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>DMSO<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Conc.:<\/th><td>1 \u00b5g\/mL<\/td><\/tr><tr class=\"cgram_header_row\"><th class=\"conditions_header\" scope=\"row\">Injection<\/th><td><\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Inj. Vol.:<\/th><td>1 \u00b5L splitless (hold 0.5  min)<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Liner:<\/th><td>3.5 mm Single Gooseneck Liner with wool placed 3 cm from top (middle)<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Inj. Temp.:<\/th><td>220 \u00b0C<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Purge Flow:<\/th><td>3 mL\/min<\/td><\/tr><tr class=\"cgram_header_row\"><th class=\"conditions_header\" scope=\"row\" colspan=\"2\">Oven<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Oven Temp.:<\/th><td>40 &#176;C (hold 3 min) to 200 &#176;C at 20 &#176;C\/min<\/td><\/tr><tr class=\"cgram_header_row\"><th class=\"conditions_header\" scope=\"row\">Carrier Gas<\/th><td>He, constant flow<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Linear Velocity:<\/th><td>40 cm\/sec<\/td><\/tr><\/table><table class=\"conditions col-lg-6 col-12\"><tr><th class=\"conditions_header\" scope=\"row\">Detector<\/th><td>MS<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Mode:<\/th><td>Scan<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Transfer Line Temp.:<\/th><td>280 \u00b0C<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Analyzer Type:<\/th><td>Quadrupole <\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Source Temp.:<\/th><td>280 \u00b0C<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Solvent Delay Time:<\/th><td>0.5  min<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Ionization Mode:<\/th><td>EI <\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Scan Range:<\/th><td>30-300 amu<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Scan Rate:<\/th><td>5 scans\/sec<\/td><\/tr><tr class=\"cgram_header_row\"><th class=\"conditions_header\" scope=\"row\">Instrument<\/th><td>Shimadzu 2010 GC &amp; QP2010+ MS<\/td><\/tr><tr class=\"cgram_header_row\"><th class=\"conditions_header\" scope=\"row\">Notes<\/th><td>Liner cat.# 22286 was used to produce this chromatogram, but it has since been discontinued. We recommend cat.# 22287 [or cat.# 23321] as an alternative. For assistance choosing a replacement for this application, contact Restek Technical Service or your local Restek representative.<br \/>&#8211; &#8211; &#8211; &#8211; &#8211; &#8211;<br \/>Ions displayed: 42, 43, 57, 108 m\/z<\/td><\/tr><\/table><\/div><\/div><\/div><div class=\"chromatogram-pdf-link\"><a href=\"https:\/\/ez.restek.com\/images\/cgram\/gc_ph1166.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<div class=\"wp-block-custom-chromatogram-article-top\"><div class=\"chromatogram-article-placeholder\"><div class=\"figure-heading\"><strong>Figure 5:<\/strong>\u00a0System suitability pass rates can be improved with Rxi-624Sil MS columns. The innovative polymer chemistry provides greater resolution of critical pairs that are difficult to separate on other 624 type columns.<\/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\/gc_ph1160.png\" alt=\"Class 1 Residual Solvents for USP &lt;467&gt; Water-Soluble Articles on Rxi-624Sil MS\" title=\"-\"><\/div><p class=\"article-id\" style=\"text-align:center\"> GC_PH1160<\/p><div class=\"chromatogram-peaks\"><h4>Peaks<\/h4><table class=\"peaks col-lg-4 col-12\">\n<thead><tr><th><\/th><th style=\"text-align: left;width: 75px\">Peaks<\/th><th style=\"text-align: center;width: 50px\">t<sub>R<\/sub> (min)<\/th><th style=\"text-align: center;width: 50px\">Conc.<br \/>(\u00b5g\/mL)<\/th><\/tr><\/thead>\n<tbody><tr><td class=\"num\">1.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for 1,1-Dichloroethene\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/75-35-4\/1,1-Dichloroethene\" target=\"_blank\" rel=\"noopener\">1,1-Dichloroethene<\/a><\/td><td class=\"oth\">3.586<\/td><td class=\"oth\">0.07<\/td><\/tr>\n<tr><td class=\"num\">2.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for 1,1,1-Trichloroethane\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/71-55-6\/1,1,1-Trichloroethane\" target=\"_blank\" rel=\"noopener\">1,1,1-Trichloroethane<\/a><\/td><td class=\"oth\">8.536<\/td><td class=\"oth\">0.08<\/td><\/tr>\n<tr><td class=\"num\">3.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Carbon tetrachloride\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/56-23-5\/Carbon tetrachloride\" target=\"_blank\" rel=\"noopener\">Carbon tetrachloride<\/a><\/td><td class=\"oth\">9.042<\/td><td class=\"oth\">0.03<\/td><\/tr>\n<tr><td class=\"num\">4.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Benzene\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/71-43-2\/Benzene\" target=\"_blank\" rel=\"noopener\">Benzene<\/a><\/td><td class=\"oth\">9.787<\/td><td class=\"oth\">0.02<\/td><\/tr>\n<tr><td class=\"num\">5.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for 1,2-Dichloroethane\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/107-06-2\/1,2-Dichloroethane\" target=\"_blank\" rel=\"noopener\">1,2-Dichloroethane<\/a><\/td><td class=\"oth\">10.112<\/td><td class=\"oth\">0.04<\/td><\/tr>\n<\/tbody><\/table><div class=\"peaknotes\">* DMSO interference<\/div><\/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>Rxi-624Sil MS, 30 m, 0.32 mm ID, 1.80 \u00b5m (<a target=\"_blank\" href=\"https:\/\/www.restek.com\/p\/13870?utm_source=chromatograms&amp;utm_medium=link&amp;utm_campaign=GC_PH1160\" rel=\"noopener\">cat.# 13870<\/a>)<\/td><\/tr><tr class=\"cgram_header_row\"><th class=\"conditions_header\" scope=\"row\">Standard\/Sample<\/th><td>Residual Solvents &#8211; Class 1 (<a target=\"_blank\" href=\"https:\/\/www.restek.com\/p\/36279?utm_source=chromatograms&amp;utm_medium=link&amp;utm_campaign=GC_PH1160\" rel=\"noopener\">cat.# 36279<\/a>)<\/td><\/tr>\n<tr><th class=\"sub conditions_header\" scope=\"row\">Diluent:<\/th><td>water<\/td><\/tr><tr class=\"cgram_header_row\"><th class=\"conditions_header\" scope=\"row\">Injection<\/th><td>headspace-loop split (split ratio 5:1)<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Liner:<\/th><td>1mm Split<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Inj. Port Temp.:<\/th><td>140 \u00b0C<\/td><\/tr><tr class=\"cgram_header_row\"><th class=\"conditions_header\" scope=\"row\">Headspace-Loop<\/th><td><\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Instrument:<\/th><td>Tekmar HT3 <\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Inj. Time:<\/th><td>1  min<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Transfer Line Temp.:<\/th><td>110 \u00b0C<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Valve Oven Temp.:<\/th><td>110 \u00b0C<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Sample Temp.:<\/th><td>80 \u00b0C<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Sample Equil. Time:<\/th><td>60  min<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Vial Pressure:<\/th><td>10 psi<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Pressurize Time:<\/th><td>0.5  min<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Pressure Equilibration Time:<\/th><td>0.05  min<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Loop Pressure:<\/th><td>5 psi<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Loop Fill Time:<\/th><td>0.1  min<\/td><\/tr><tr class=\"cgram_header_row\"><th class=\"conditions_header\" scope=\"row\" colspan=\"2\">Oven<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Oven Temp.:<\/th><td>40 &#176;C (hold 20 min) to 240 &#176;C at 10 &#176;C\/min (hold 20 min)<\/td><\/tr><tr class=\"cgram_header_row\"><th class=\"conditions_header\" scope=\"row\">Carrier Gas<\/th><td>He, constant flow<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Linear Velocity:<\/th><td>35 cm\/sec<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Dead Time:<\/th><td>1.45  min @ 40 \u00b0C<\/td><\/tr><\/table><table class=\"conditions col-lg-6 col-12\"><tr><th class=\"conditions_header\" scope=\"row\">Detector<\/th><td>FID @ 250 \u00b0C<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Data Rate:<\/th><td>5 Hz<\/td><\/tr><tr class=\"cgram_header_row\"><th class=\"conditions_header\" scope=\"row\">Instrument<\/th><td>Agilent\/HP6890  GC<\/td><\/tr><tr class=\"cgram_header_row\"><th class=\"conditions_header\" scope=\"row\">Notes<\/th><td>Liner cat.# 20972 was used to produce this chromatogram, but it has since been discontinued. We recommend cat.# 20973 [or cat.# 23333] as an alternative. For assistance choosing a replacement for this application, contact Restek Technical Service or your local Restek representative.<br \/>&#8211; &#8211; &#8211; &#8211; &#8211; &#8211;<br \/>Columns were run under identical conditions.<\/td><\/tr><tr class=\"cgram_header_row\"><th class=\"conditions_header\" scope=\"row\">Acknowledgement<\/th><td>Teledyne Tekmar<\/td><\/tr><\/table><\/div><\/div><\/div><div class=\"chromatogram-pdf-link\"><a href=\"https:\/\/ez.restek.com\/images\/cgram\/gc_ph1160.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:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Improve Productivity and Resolve Critical Pairs in Environmental Samples<\/h2>\n\n\n\n<p>Fast sample throughput is a primary concern for environmental labs interested in improving productivity. Volatiles methods typically are&nbsp;time-consuming, but developing optimized procedures can be challenging because compound lists are extensive, and analytes vary significantly&nbsp;in chemical characteristics. The selectivity and inertness of Rxi-624Sil MS columns make them ideal for optimizing environmental&nbsp;volatiles methods for better resolution and faster analysis time.<\/p>\n\n\n\n<p>Establishing conditions that maximize sample throughput can be difficult because conditions optimized for speed can result in problematic&nbsp;coelutions while conditions optimized for resolution can result in long analysis times. The exceptional inertness of Rxi-624Sil MS columns&nbsp;produces highly symmetrical peaks for active compounds, which improves resolution and allows separations to be maintained even under&nbsp;faster conditions. As shown in Figure 6, an optimized method was developed using an Rxi-624Sil MS column to maintain adequate resolution&nbsp;while throughput was maximized by synchronizing purge-and-trap cycles with instrument cycles.<\/p>\n\n\n\n<p>Initially, several critical pairs were chosen for computational modeling using Pro <em>EZ<\/em>GC software. The temperature program first determined&nbsp;by the software provided the best resolution but also resulted in an analysis time of 19 minutes. Since the purge-and-trap cycle time was 16.5&nbsp;minutes, other conditions were evaluated to see if adequate resolution could be maintained using a faster instrument cycle. The final program&nbsp;reduced instrument downtime by better synchronizing purge-and-trap cycles with instrument cycles, and also provided excellent resolution.&nbsp;Using these conditions, up to 36 samples can be analyzed following EPA Method 8260 in a 12-hour shift.<\/p>\n\n\n\n<p>Labs interested in optimizing both sample throughput and resolution of VOCs can adopt the synchronized conditions established here on&nbsp;Rxi-624Sil MS columns to maximize productivity and assure accurate, reliable results.<\/p>\n\n\n<div class=\"wp-block-custom-chromatogram-article-top\"><div class=\"chromatogram-article-placeholder\"><div class=\"figure-heading\"><strong>Figure 6:<\/strong>\u00a0Using an Rxi-624Sil MS column under optimized conditions increases productivity by assuring good resolution and minimal downtime when analyzing environmental volatiles.<\/div><div class='chromatogram-article-inner-full'><div class=\"chromatogram-article-inner\">\n\n<h5 class=\"wp-block-heading has-text-color has-link-color wp-elements-f16c65e3161fe03c4ebae8edf7bb14a4\" style=\"color:#0082c5\">Analyze up to 36 samples per shift by synchronizing instrument and purge-and-trap cycles.<\/h5>\n\n\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\/gc_ev1169.png\" alt=\"Volatiles by EPA Method 8260 on Rxi-624Sil MS (30m, 0.25mm ID, 1.40\u00b5m)\" title=\"-\"><\/div><p class=\"article-id\" style=\"text-align:center\"> GC_EV1169<\/p><div class=\"chromatogram-peaks\"><h4>Peaks<\/h4><table class=\"peaks col-lg-4 col-12 peak-33\">\n<thead><tr><th><\/th><th style=\"text-align: left;width: 75px\">Peaks<\/th><th style=\"text-align: center;width: 50px\">t<sub>R<\/sub> (min)<\/th><\/tr><\/thead>\n<tbody><tr><td class=\"num\">1.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Dichlorodifluoromethane (CFC-12)\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/75-71-8\/Dichlorodifluoromethane\" target=\"_blank\" rel=\"noopener\">Dichlorodifluoromethane (CFC-12)<\/a><\/td><td class=\"oth\">2.198<\/td><\/tr>\n<tr><td class=\"num\">2.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Chloromethane\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/74-87-3\/Chloromethane\" target=\"_blank\" rel=\"noopener\">Chloromethane<\/a><\/td><td class=\"oth\">2.459<\/td><\/tr>\n<tr><td class=\"num\">3.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Vinyl chloride\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/75-01-4\/Vinyl chloride\" target=\"_blank\" rel=\"noopener\">Vinyl chloride<\/a><\/td><td class=\"oth\">2.659<\/td><\/tr>\n<tr><td class=\"num\">4.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Bromomethane\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/74-83-9\/Bromomethane\" target=\"_blank\" rel=\"noopener\">Bromomethane<\/a><\/td><td class=\"oth\">3.226<\/td><\/tr>\n<tr><td class=\"num\">5.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Chloroethane\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/75-00-3\/Chloroethane\" target=\"_blank\" rel=\"noopener\">Chloroethane<\/a><\/td><td class=\"oth\">3.434<\/td><\/tr>\n<tr><td class=\"num\">6.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Trichlorofluoromethane (CFC-11)\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/75-69-4\/Trichlorofluoromethane\" target=\"_blank\" rel=\"noopener\">Trichlorofluoromethane (CFC-11)<\/a><\/td><td class=\"oth\">3.876<\/td><\/tr>\n<tr><td class=\"num\">7.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Diethyl ether (ethyl ether)\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/60-29-7\/Diethyl ether\" target=\"_blank\" rel=\"noopener\">Diethyl ether (ethyl ether)<\/a><\/td><td class=\"oth\">4.44<\/td><\/tr>\n<tr><td class=\"num\">8.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for 1,1-Dichloroethene\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/75-35-4\/1,1-Dichloroethene\" target=\"_blank\" rel=\"noopener\">1,1-Dichloroethene<\/a><\/td><td class=\"oth\">4.909<\/td><\/tr>\n<tr><td class=\"num\">9.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for 1,1,2-Trichlorotrifluoroethane (CFC-113)\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/76-13-1\/1,1,2-Trichlorotrifluoroethane\" target=\"_blank\" rel=\"noopener\">1,1,2-Trichlorotrifluoroethane (CFC-113)<\/a><\/td><td class=\"oth\">4.998<\/td><\/tr>\n<tr><td class=\"num\">10.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Acetone\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/67-64-1\/Acetone\" target=\"_blank\" rel=\"noopener\">Acetone<\/a><\/td><td class=\"oth\">5.029<\/td><\/tr>\n<tr><td class=\"num\">11.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Iodomethane\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/74-88-4\/Iodomethane\" target=\"_blank\" rel=\"noopener\">Iodomethane<\/a><\/td><td class=\"oth\">5.195<\/td><\/tr>\n<tr><td class=\"num\">12.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Carbon disulfide\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/75-15-0\/Carbon disulfide\" target=\"_blank\" rel=\"noopener\">Carbon disulfide<\/a><\/td><td class=\"oth\">5.323<\/td><\/tr>\n<tr><td class=\"num\">13.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Acetonitrile\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/75-05-8\/Acetonitrile\" target=\"_blank\" rel=\"noopener\">Acetonitrile<\/a><\/td><td class=\"oth\">5.637<\/td><\/tr>\n<tr><td class=\"num\">14.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Allyl chloride\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/107-05-1\/Allyl chloride\" target=\"_blank\" rel=\"noopener\">Allyl chloride<\/a><\/td><td class=\"oth\">5.715<\/td><\/tr>\n<tr><td class=\"num\">15.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Methyl acetate\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/79-20-9\/Methyl acetate\" target=\"_blank\" rel=\"noopener\">Methyl acetate<\/a><\/td><td class=\"oth\">5.723<\/td><\/tr>\n<tr><td class=\"num\">16.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Methylene chloride\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/75-09-2\/Methylene chloride\" target=\"_blank\" rel=\"noopener\">Methylene chloride<\/a><\/td><td class=\"oth\">5.981<\/td><\/tr>\n<tr><td class=\"num\">17.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for tert-Butyl alcohol\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/75-65-0\/tert-Butyl alcohol\" target=\"_blank\" rel=\"noopener\">tert-Butyl alcohol<\/a><\/td><td class=\"oth\">6.234<\/td><\/tr>\n<tr><td class=\"num\">18.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Acrylonitrile\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/107-13-1\/Acrylonitrile\" target=\"_blank\" rel=\"noopener\">Acrylonitrile<\/a><\/td><td class=\"oth\">6.451<\/td><\/tr>\n<tr><td class=\"num\">19.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Methyl tert-butyl ether (MTBE)\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/1634-04-4\/Methyl tert-butyl ether\" target=\"_blank\" rel=\"noopener\">Methyl tert-butyl ether (MTBE)<\/a><\/td><td class=\"oth\">6.509<\/td><\/tr>\n<tr><td class=\"num\">20.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for trans-1,2-Dichloroethene\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/156-60-5\/trans-1,2-Dichloroethene\" target=\"_blank\" rel=\"noopener\">trans-1,2-Dichloroethene<\/a><\/td><td class=\"oth\">6.512<\/td><\/tr>\n<tr><td class=\"num\">21.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for 1,1-Dichloroethane\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/75-34-3\/1,1-Dichloroethane\" target=\"_blank\" rel=\"noopener\">1,1-Dichloroethane<\/a><\/td><td class=\"oth\">7.315<\/td><\/tr>\n<tr><td class=\"num\">22.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Vinyl acetate\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/108-05-4\/Vinyl acetate\" target=\"_blank\" rel=\"noopener\">Vinyl acetate<\/a><\/td><td class=\"oth\">7.359<\/td><\/tr>\n<tr><td class=\"num\">23.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Diisopropyl ether (DIPE)\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/108-20-3\/Diisopropyl ether\" target=\"_blank\" rel=\"noopener\">Diisopropyl ether (DIPE)<\/a><\/td><td class=\"oth\">7.407<\/td><\/tr>\n<tr><td class=\"num\">24.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Chloroprene\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/126-99-8\/Chloroprene\" target=\"_blank\" rel=\"noopener\">Chloroprene<\/a><\/td><td class=\"oth\">7.429<\/td><\/tr>\n<tr><td class=\"num\">25.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Ethyl tert-butyl ether (ETBE)\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/637-92-3\/Ethyl tert-butyl ether\" target=\"_blank\" rel=\"noopener\">Ethyl tert-butyl ether (ETBE)<\/a><\/td><td class=\"oth\">7.97<\/td><\/tr>\n<tr><td class=\"num\">26.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for 2-Butanone (MEK)\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/78-93-3\/2-Butanone\" target=\"_blank\" rel=\"noopener\">2-Butanone (MEK)<\/a><\/td><td class=\"oth\">8.193<\/td><\/tr>\n<tr><td class=\"num\">27.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for cis-1,2-Dichloroethene\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/156-59-2\/cis-1,2-Dichloroethene\" target=\"_blank\" rel=\"noopener\">cis-1,2-Dichloroethene<\/a><\/td><td class=\"oth\">8.193<\/td><\/tr>\n<tr><td class=\"num\">28.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for 2,2-Dichloropropane\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/594-20-7\/2,2-Dichloropropane\" target=\"_blank\" rel=\"noopener\">2,2-Dichloropropane<\/a><\/td><td class=\"oth\">8.193<\/td><\/tr>\n<tr><td class=\"num\">29.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Ethyl acetate\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/141-78-6\/Ethyl acetate\" target=\"_blank\" rel=\"noopener\">Ethyl acetate<\/a><\/td><td class=\"oth\">8.265<\/td><\/tr>\n<tr><td class=\"num\">30.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Propionitrile\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/107-12-0\/Propionitrile\" target=\"_blank\" rel=\"noopener\">Propionitrile<\/a><\/td><td class=\"oth\">8.276<\/td><\/tr>\n<tr><td class=\"num\">31.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Methyl acrylate\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/96-33-3\/Methyl acrylate\" target=\"_blank\" rel=\"noopener\">Methyl acrylate<\/a><\/td><td class=\"oth\">8.318<\/td><\/tr>\n<tr><td class=\"num\">32.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Methacrylonitrile\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/126-98-7\/Methacrylonitrile\" target=\"_blank\" rel=\"noopener\">Methacrylonitrile<\/a><\/td><td class=\"oth\">8.476<\/td><\/tr>\n<tr><td class=\"num\">33.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Bromochloromethane\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/74-97-5\/Bromochloromethane\" target=\"_blank\" rel=\"noopener\">Bromochloromethane<\/a><\/td><td class=\"oth\">8.507<\/td><\/tr>\n<tr><td class=\"num\">34.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Tetrahydrofuran\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/109-99-9\/Tetrahydrofuran\" target=\"_blank\" rel=\"noopener\">Tetrahydrofuran<\/a><\/td><td class=\"oth\">8.521<\/td><\/tr>\n<tr><td class=\"num\">35.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Chloroform\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/67-66-3\/Chloroform\" target=\"_blank\" rel=\"noopener\">Chloroform<\/a><\/td><td class=\"oth\">8.651<\/td><\/tr>\n<\/tbody><\/table>\n<table class=\"peaks col-lg-4 col-12 peak-33\"><thead><tr><th><\/th><th style=\"text-align: left;width: 75px\">Peaks<\/th><th style=\"text-align: center;width: 50px\">t<sub>R<\/sub> (min)<\/th><\/tr><\/thead><tbody>\n<tr><td class=\"num\">36.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for 1,1,1-Trichloroethane\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/71-55-6\/1,1,1-Trichloroethane\" target=\"_blank\" rel=\"noopener\">1,1,1-Trichloroethane<\/a><\/td><td class=\"oth\">8.843<\/td><\/tr>\n<tr><td class=\"num\">37.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Dibromofluoromethane\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/1868-53-7\/Dibromofluoromethane\" target=\"_blank\" rel=\"noopener\">Dibromofluoromethane<\/a><\/td><td class=\"oth\">8.848<\/td><\/tr>\n<tr><td class=\"num\">38.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Carbon tetrachloride\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/56-23-5\/Carbon tetrachloride\" target=\"_blank\" rel=\"noopener\">Carbon tetrachloride<\/a><\/td><td class=\"oth\">9.026<\/td><\/tr>\n<tr><td class=\"num\">39.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for 1,1-Dichloropropene\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/563-58-6\/1,1-Dichloropropene\" target=\"_blank\" rel=\"noopener\">1,1-Dichloropropene<\/a><\/td><td class=\"oth\">9.037<\/td><\/tr>\n<tr><td class=\"num\">40.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for 1,2-Dichloroethane-d4\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/17060-07-0\/1,2-Dichloroethane-d4\" target=\"_blank\" rel=\"noopener\">1,2-Dichloroethane-d4<\/a><\/td><td class=\"oth\">9.246<\/td><\/tr>\n<tr><td class=\"num\">41.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Benzene\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/71-43-2\/Benzene\" target=\"_blank\" rel=\"noopener\">Benzene<\/a><\/td><td class=\"oth\">9.262<\/td><\/tr>\n<tr><td class=\"num\">42.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for 1,2-Dichloroethane\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/107-06-2\/1,2-Dichloroethane\" target=\"_blank\" rel=\"noopener\">1,2-Dichloroethane<\/a><\/td><td class=\"oth\">9.334<\/td><\/tr>\n<tr><td class=\"num\">43.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Isopropyl acetate\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/108-21-4\/Isopropyl acetate\" target=\"_blank\" rel=\"noopener\">Isopropyl acetate<\/a><\/td><td class=\"oth\">9.34<\/td><\/tr>\n<tr><td class=\"num\">44.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Isobutyl alcohol\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/78-83-1\/Isobutyl alcohol\" target=\"_blank\" rel=\"noopener\">Isobutyl alcohol<\/a><\/td><td class=\"oth\">9.421<\/td><\/tr>\n<tr><td class=\"num\">45.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for tert-Amyl methyl ether (TAME)\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/994-05-8\/tert-Amyl methyl ether\" target=\"_blank\" rel=\"noopener\">tert-Amyl methyl ether (TAME)<\/a><\/td><td class=\"oth\">9.421<\/td><\/tr>\n<tr><td class=\"num\">46.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Fluorobenzene\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/462-06-6\/Fluorobenzene\" target=\"_blank\" rel=\"noopener\">Fluorobenzene<\/a><\/td><td class=\"oth\">9.598<\/td><\/tr>\n<tr><td class=\"num\">47.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Trichloroethene\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/79-01-6\/Trichloroethene\" target=\"_blank\" rel=\"noopener\">Trichloroethene<\/a><\/td><td class=\"oth\">9.976<\/td><\/tr>\n<tr><td class=\"num\">48.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for 1,2-Dichloropropane\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/78-87-5\/1,2-Dichloropropane\" target=\"_blank\" rel=\"noopener\">1,2-Dichloropropane<\/a><\/td><td class=\"oth\">10.243<\/td><\/tr>\n<tr><td class=\"num\">49.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Methyl methacrylate\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/80-62-6\/Methyl methacrylate\" target=\"_blank\" rel=\"noopener\">Methyl methacrylate<\/a><\/td><td class=\"oth\">10.29<\/td><\/tr>\n<tr><td class=\"num\">50.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for 1,4-Dioxane (ND)\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/123-91-1\/1,4-Dioxane\" target=\"_blank\" rel=\"noopener\">1,4-Dioxane (ND)<\/a><\/td><td class=\"oth\">10.299*<\/td><\/tr>\n<tr><td class=\"num\">51.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Dibromomethane\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/74-95-3\/Dibromomethane\" target=\"_blank\" rel=\"noopener\">Dibromomethane<\/a><\/td><td class=\"oth\">10.326<\/td><\/tr>\n<tr><td class=\"num\">52.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Propyl acetate\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/109-60-4\/Propyl acetate\" target=\"_blank\" rel=\"noopener\">Propyl acetate<\/a><\/td><td class=\"oth\">10.346<\/td><\/tr>\n<tr><td class=\"num\">53.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for 2-Chloroethanol (ND)\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/107-07-3\/2-Chloroethanol\" target=\"_blank\" rel=\"noopener\">2-Chloroethanol (ND)<\/a><\/td><td class=\"oth\">10.368*<\/td><\/tr>\n<tr><td class=\"num\">54.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Bromodichloromethane\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/75-27-4\/Bromodichloromethane\" target=\"_blank\" rel=\"noopener\">Bromodichloromethane<\/a><\/td><td class=\"oth\">10.496<\/td><\/tr>\n<tr><td class=\"num\">55.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for 2-Nitropropane\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/79-46-9\/2-Nitropropane\" target=\"_blank\" rel=\"noopener\">2-Nitropropane<\/a><\/td><td class=\"oth\">10.698<\/td><\/tr>\n<tr><td class=\"num\">56.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for cis-1,3-Dichloropropene\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/10061-01-5\/cis-1,3-Dichloropropene\" target=\"_blank\" rel=\"noopener\">cis-1,3-Dichloropropene<\/a><\/td><td class=\"oth\">10.904<\/td><\/tr>\n<tr><td class=\"num\">57.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for 4-Methyl-2-pentanone (MIBK)\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/108-10-1\/4-Methyl-2-pentanone\" target=\"_blank\" rel=\"noopener\">4-Methyl-2-pentanone (MIBK)<\/a><\/td><td class=\"oth\">11.026<\/td><\/tr>\n<tr><td class=\"num\">58.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Toluene-D8\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/2037-26-5\/Toluene-D8\" target=\"_blank\" rel=\"noopener\">Toluene-D8<\/a><\/td><td class=\"oth\">11.148<\/td><\/tr>\n<tr><td class=\"num\">59.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Toluene\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/108-88-3\/Toluene\" target=\"_blank\" rel=\"noopener\">Toluene<\/a><\/td><td class=\"oth\">11.21<\/td><\/tr>\n<tr><td class=\"num\">60.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for trans-1,3-Dichloropropene\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/10061-02-6\/trans-1,3-Dichloropropene\" target=\"_blank\" rel=\"noopener\">trans-1,3-Dichloropropene<\/a><\/td><td class=\"oth\">11.407<\/td><\/tr>\n<tr><td class=\"num\">61.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Ethyl methacrylate\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/97-63-2\/Ethyl methacrylate\" target=\"_blank\" rel=\"noopener\">Ethyl methacrylate<\/a><\/td><td class=\"oth\">11.435<\/td><\/tr>\n<tr><td class=\"num\">62.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for 1,1,2-Trichloroethane\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/79-00-5\/1,1,2-Trichloroethane\" target=\"_blank\" rel=\"noopener\">1,1,2-Trichloroethane<\/a><\/td><td class=\"oth\">11.585<\/td><\/tr>\n<tr><td class=\"num\">63.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Tetrachloroethene\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/127-18-4\/Tetrachloroethene\" target=\"_blank\" rel=\"noopener\">Tetrachloroethene<\/a><\/td><td class=\"oth\">11.662<\/td><\/tr>\n<tr><td class=\"num\">64.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for 1,3-Dichloropropane\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/142-28-9\/1,3-Dichloropropane\" target=\"_blank\" rel=\"noopener\">1,3-Dichloropropane<\/a><\/td><td class=\"oth\">11.729<\/td><\/tr>\n<tr><td class=\"num\">65.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for 2-Hexanone\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/591-78-6\/2-Hexanone\" target=\"_blank\" rel=\"noopener\">2-Hexanone<\/a><\/td><td class=\"oth\">11.749<\/td><\/tr>\n<tr><td class=\"num\">66.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Butyl acetate\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/123-86-4\/Butyl acetate\" target=\"_blank\" rel=\"noopener\">Butyl acetate<\/a><\/td><td class=\"oth\">11.837<\/td><\/tr>\n<tr><td class=\"num\">67.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Dibromochloromethane\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/124-48-1\/Dibromochloromethane\" target=\"_blank\" rel=\"noopener\">Dibromochloromethane<\/a><\/td><td class=\"oth\">11.921<\/td><\/tr>\n<tr><td class=\"num\">68.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for 1,2-Dibromoethane (EDB)\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/106-93-4\/1,2-Dibromoethane\" target=\"_blank\" rel=\"noopener\">1,2-Dibromoethane (EDB)<\/a><\/td><td class=\"oth\">12.035<\/td><\/tr>\n<tr><td class=\"num\">69.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Chlorobenzene-d5\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/3114-55-4\/Chlorobenzene-d5\" target=\"_blank\" rel=\"noopener\">Chlorobenzene-d5<\/a><\/td><td class=\"oth\">12.412<\/td><\/tr>\n<tr><td class=\"num\">70.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Chlorobenzene\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/108-90-7\/Chlorobenzene\" target=\"_blank\" rel=\"noopener\">Chlorobenzene<\/a><\/td><td class=\"oth\">12.44<\/td><\/tr>\n<\/tbody><\/table>\n<table class=\"peaks col-lg-4 col-12 peak-33\"><thead><tr><th><\/th><th style=\"text-align: left;width: 75px\">Peaks<\/th><th style=\"text-align: center;width: 50px\">t<sub>R<\/sub> (min)<\/th><\/tr><\/thead><tbody>\n<tr><td class=\"num\">71.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Ethylbenzene\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/100-41-4\/Ethylbenzene\" target=\"_blank\" rel=\"noopener\">Ethylbenzene<\/a><\/td><td class=\"oth\">12.507<\/td><\/tr>\n<tr><td class=\"num\">72.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for 1,1,1,2-Tetrachloroethane\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/630-20-6\/1,1,1,2-Tetrachloroethane\" target=\"_blank\" rel=\"noopener\">1,1,1,2-Tetrachloroethane<\/a><\/td><td class=\"oth\">12.507<\/td><\/tr>\n<tr><td class=\"num\">73.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for m-Xylene\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/108-38-3\/m-Xylene\" target=\"_blank\" rel=\"noopener\">m-Xylene<\/a><\/td><td class=\"oth\">12.612<\/td><\/tr>\n<tr><td class=\"num\">74.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for p-Xylene\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/106-42-3\/p-Xylene\" target=\"_blank\" rel=\"noopener\">p-Xylene<\/a><\/td><td class=\"oth\">12.612<\/td><\/tr>\n<tr><td class=\"num\">75.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for o-Xylene\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/95-47-6\/o-Xylene\" target=\"_blank\" rel=\"noopener\">o-Xylene<\/a><\/td><td class=\"oth\">12.935<\/td><\/tr>\n<tr><td class=\"num\">76.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Styrene\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/100-42-5\/Styrene\" target=\"_blank\" rel=\"noopener\">Styrene<\/a><\/td><td class=\"oth\">12.949<\/td><\/tr>\n<tr><td class=\"num\">77.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for n-Amyl acetate\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/628-63-7\/n-Amyl acetate\" target=\"_blank\" rel=\"noopener\">n-Amyl acetate<\/a><\/td><td class=\"oth\">13.018<\/td><\/tr>\n<tr><td class=\"num\">78.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Bromoform\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/75-25-2\/Bromoform\" target=\"_blank\" rel=\"noopener\">Bromoform<\/a><\/td><td class=\"oth\">13.118<\/td><\/tr>\n<tr><td class=\"num\">79.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Isopropylbenzene (cumene)\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/98-82-8\/Isopropylbenzene\" target=\"_blank\" rel=\"noopener\">Isopropylbenzene (cumene)<\/a><\/td><td class=\"oth\">13.226<\/td><\/tr>\n<tr><td class=\"num\">80.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for cis-1,4-Dichloro-2-butene\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/1476-11-5\/cis-1,4-Dichloro-2-butene\" target=\"_blank\" rel=\"noopener\">cis-1,4-Dichloro-2-butene<\/a><\/td><td class=\"oth\">13.268<\/td><\/tr>\n<tr><td class=\"num\">81.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for 4-Bromofluorobenzene\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/460-00-4\/4-Bromofluorobenzene\" target=\"_blank\" rel=\"noopener\">4-Bromofluorobenzene<\/a><\/td><td class=\"oth\">13.385<\/td><\/tr>\n<tr><td class=\"num\">82.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for 1,1,2,2-Tetrachloroethane\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/79-34-5\/1,1,2,2-Tetrachloroethane\" target=\"_blank\" rel=\"noopener\">1,1,2,2-Tetrachloroethane<\/a><\/td><td class=\"oth\">13.456<\/td><\/tr>\n<tr><td class=\"num\">83.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for trans-1,4-Dichloro-2-butene\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/110-57-6\/trans-1,4-Dichloro-2-butene\" target=\"_blank\" rel=\"noopener\">trans-1,4-Dichloro-2-butene<\/a><\/td><td class=\"oth\">13.496<\/td><\/tr>\n<tr><td class=\"num\">84.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Bromobenzene\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/108-86-1\/Bromobenzene\" target=\"_blank\" rel=\"noopener\">Bromobenzene<\/a><\/td><td class=\"oth\">13.515<\/td><\/tr>\n<tr><td class=\"num\">85.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for 1,2,3-Trichloropropane\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/96-18-4\/1,2,3-Trichloropropane\" target=\"_blank\" rel=\"noopener\">1,2,3-Trichloropropane<\/a><\/td><td class=\"oth\">13.526<\/td><\/tr>\n<tr><td class=\"num\">86.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for n-Propylbenzene\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/103-65-1\/n-Propylbenzene\" target=\"_blank\" rel=\"noopener\">n-Propylbenzene<\/a><\/td><td class=\"oth\">13.565<\/td><\/tr>\n<tr><td class=\"num\">87.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for 2-Chlorotoluene\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/95-49-8\/2-Chlorotoluene\" target=\"_blank\" rel=\"noopener\">2-Chlorotoluene<\/a><\/td><td class=\"oth\">13.657<\/td><\/tr>\n<tr><td class=\"num\">88.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for 1,3,5-Trimethylbenzene\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/108-67-8\/1,3,5-Trimethylbenzene\" target=\"_blank\" rel=\"noopener\">1,3,5-Trimethylbenzene<\/a><\/td><td class=\"oth\">13.699<\/td><\/tr>\n<tr><td class=\"num\">89.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for 4-Chlorotoluene\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/106-43-4\/4-Chlorotoluene\" target=\"_blank\" rel=\"noopener\">4-Chlorotoluene<\/a><\/td><td class=\"oth\">13.751<\/td><\/tr>\n<tr><td class=\"num\">90.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for tert-Butylbenzene\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/98-06-6\/tert-Butylbenzene\" target=\"_blank\" rel=\"noopener\">tert-Butylbenzene<\/a><\/td><td class=\"oth\">13.965<\/td><\/tr>\n<tr><td class=\"num\">91.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Pentachloroethane\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/76-01-7\/Pentachloroethane\" target=\"_blank\" rel=\"noopener\">Pentachloroethane<\/a><\/td><td class=\"oth\">14.007<\/td><\/tr>\n<tr><td class=\"num\">92.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for 1,2,4-Trimethylbenzene\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/95-63-6\/1,2,4-Trimethylbenzene\" target=\"_blank\" rel=\"noopener\">1,2,4-Trimethylbenzene<\/a><\/td><td class=\"oth\">14.01<\/td><\/tr>\n<tr><td class=\"num\">93.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for sec-Butylbenzene\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/135-98-8\/sec-Butylbenzene\" target=\"_blank\" rel=\"noopener\">sec-Butylbenzene<\/a><\/td><td class=\"oth\">14.14<\/td><\/tr>\n<tr><td class=\"num\">94.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for 4-Isopropyltoluene (p-cymene)\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/99-87-6\/4-Isopropyltoluene\" target=\"_blank\" rel=\"noopener\">4-Isopropyltoluene (p-cymene)<\/a><\/td><td class=\"oth\">14.254<\/td><\/tr>\n<tr><td class=\"num\">95.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for 1,3-Dichlorobenzene\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/541-73-1\/1,3-Dichlorobenzene\" target=\"_blank\" rel=\"noopener\">1,3-Dichlorobenzene<\/a><\/td><td class=\"oth\">14.263<\/td><\/tr>\n<tr><td class=\"num\">96.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for 1,4-Dichlorobenzene-D4\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/3855-82-1\/1,4-Dichlorobenzene-D4\" target=\"_blank\" rel=\"noopener\">1,4-Dichlorobenzene-D4<\/a><\/td><td class=\"oth\">14.321<\/td><\/tr>\n<tr><td class=\"num\">97.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for 1,4-Dichlorobenzene\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/106-46-7\/1,4-Dichlorobenzene\" target=\"_blank\" rel=\"noopener\">1,4-Dichlorobenzene<\/a><\/td><td class=\"oth\">14.34<\/td><\/tr>\n<tr><td class=\"num\">98.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for n-Butylbenzene\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/104-51-8\/n-Butylbenzene\" target=\"_blank\" rel=\"noopener\">n-Butylbenzene<\/a><\/td><td class=\"oth\">14.579<\/td><\/tr>\n<tr><td class=\"num\">99.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for 1,2-Dichlorobenzene\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/95-50-1\/1,2-Dichlorobenzene\" target=\"_blank\" rel=\"noopener\">1,2-Dichlorobenzene<\/a><\/td><td class=\"oth\">14.635<\/td><\/tr>\n<tr><td class=\"num\">100.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for 1,2-Dibromo-3-chloropropane (DBCP)\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/96-12-8\/1,2-Dibromo-3-chloropropane\" target=\"_blank\" rel=\"noopener\">1,2-Dibromo-3-chloropropane (DBCP)<\/a><\/td><td class=\"oth\">15.252<\/td><\/tr>\n<tr><td class=\"num\">101.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Nitrobenzene\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/98-95-3\/Nitrobenzene\" target=\"_blank\" rel=\"noopener\">Nitrobenzene<\/a><\/td><td class=\"oth\">15.407<\/td><\/tr>\n<tr><td class=\"num\">102.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for 1,2,4-Trichlorobenzene\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/120-82-1\/1,2,4-Trichlorobenzene\" target=\"_blank\" rel=\"noopener\">1,2,4-Trichlorobenzene<\/a><\/td><td class=\"oth\">15.935<\/td><\/tr>\n<tr><td class=\"num\">103.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Hexachloro-1,3-butadiene\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/87-68-3\/Hexachloro-1,3-butadiene\" target=\"_blank\" rel=\"noopener\">Hexachloro-1,3-butadiene<\/a><\/td><td class=\"oth\">16.04<\/td><\/tr>\n<tr><td class=\"num\">104.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Naphthalene\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/91-20-3\/Naphthalene\" target=\"_blank\" rel=\"noopener\">Naphthalene<\/a><\/td><td class=\"oth\">16.196<\/td><\/tr>\n<tr><td class=\"num\">105.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for 1,2,3-Trichlorobenzene\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/87-61-6\/1,2,3-Trichlorobenzene\" target=\"_blank\" rel=\"noopener\">1,2,3-Trichlorobenzene<\/a><\/td><td class=\"oth\">16.396<\/td><\/tr>\n<\/tbody><\/table><div class=\"peaknotes\">* ND = not detected; retention time determined by wet needle injection<\/div><\/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>Rxi-624Sil MS, 30 m, 0.25 mm ID, 1.40 \u00b5m (<a target=\"_blank\" href=\"https:\/\/www.restek.com\/p\/13868?utm_source=chromatograms&amp;utm_medium=link&amp;utm_campaign=GC_EV1169\" rel=\"noopener\">cat.# 13868<\/a>)<\/td><\/tr><tr class=\"cgram_header_row\"><th class=\"conditions_header\" scope=\"row\">Standard\/Sample<\/th><td><\/td><\/tr><tr><td><\/td><td>8260A surrogate mix (<a target=\"_blank\" href=\"https:\/\/www.restek.com\/p\/30240?utm_source=chromatograms&amp;utm_medium=link&amp;utm_campaign=GC_EV1169\" rel=\"noopener\">cat.# 30240<\/a>)<\/td><\/tr><tr><td><\/td><td>8260A internal standard mix (<a target=\"_blank\" href=\"https:\/\/www.restek.com\/p\/30241?utm_source=chromatograms&amp;utm_medium=link&amp;utm_campaign=GC_EV1169\" rel=\"noopener\">cat.# 30241<\/a>)<\/td><\/tr><tr><td><\/td><td>8260B MegaMix calibration mix (<a target=\"_blank\" href=\"https:\/\/www.restek.com\/p\/30633?utm_source=chromatograms&amp;utm_medium=link&amp;utm_campaign=GC_EV1169\" rel=\"noopener\">cat.# 30633<\/a>)<\/td><\/tr><tr><td><\/td><td>VOA calibration mix #1 (ketones) (<a target=\"_blank\" href=\"https:\/\/www.restek.com\/p\/30006?utm_source=chromatograms&amp;utm_medium=link&amp;utm_campaign=GC_EV1169\" rel=\"noopener\">cat.# 30006<\/a>)<\/td><\/tr><tr><td><\/td><td>8260B acetate mix (revised) (<a target=\"_blank\" href=\"https:\/\/www.restek.com\/p\/30489?utm_source=chromatograms&amp;utm_medium=link&amp;utm_campaign=GC_EV1169\" rel=\"noopener\">cat.# 30489<\/a>)<\/td><\/tr><tr><td><\/td><td>California oxygenates mix (<a target=\"_blank\" href=\"https:\/\/www.restek.com\/p\/30465?utm_source=chromatograms&amp;utm_medium=link&amp;utm_campaign=GC_EV1169\" rel=\"noopener\">cat.# 30465<\/a>)<\/td><\/tr><tr><td><\/td><td>502.2 calibration mix #1 (gases) (<a target=\"_blank\" href=\"https:\/\/www.restek.com\/p\/30042?utm_source=chromatograms&amp;utm_medium=link&amp;utm_campaign=GC_EV1169\" rel=\"noopener\">cat.# 30042<\/a>)<\/td><\/tr>\n<tr><th class=\"sub conditions_header\" scope=\"row\">Conc.:<\/th><td>  25 ppb in RO water<\/td><\/tr><tr class=\"cgram_header_row\"><th class=\"conditions_header\" scope=\"row\">Injection<\/th><td>purge and trap split (split ratio 30:1)<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Inj. Temp.:<\/th><td>225 \u00b0C<\/td><\/tr><tr class=\"cgram_header_row\"><th class=\"conditions_header\" scope=\"row\">Purge and Trap<\/th><td><\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Instrument:<\/th><td>OI Analytical 4660 <\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Trap Type:<\/th><td>10 Trap <\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Purge:<\/th><td> 11  min @ 20 \u00b0C<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Desorb Preheat Temp.:<\/th><td>180 \u00b0C<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Desorb:<\/th><td> 0.5  min @ 190 \u00b0C<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Bake:<\/th><td> 5  min @ 210 \u00b0C<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Interface Connection:<\/th><td>injection port <\/td><\/tr><tr class=\"cgram_header_row\"><th class=\"conditions_header\" scope=\"row\" colspan=\"2\">Oven<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Oven Temp.:<\/th><td>35 &#176;C (hold 5 min) to 60 &#176;C at 11 &#176;C\/min to 220 &#176;C at 20 &#176;C\/min (hold 2 min)<\/td><\/tr><tr class=\"cgram_header_row\"><th class=\"conditions_header\" scope=\"row\">Carrier Gas<\/th><td>He, constant flow<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Flow Rate:<\/th><td>1.0 mL\/min<\/td><\/tr><\/table><table class=\"conditions col-lg-6 col-12\"><tr><th class=\"conditions_header\" scope=\"row\">Detector<\/th><td>MS<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Mode:<\/th><td>Scan<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Transfer Line Temp.:<\/th><td>230 \u00b0C<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Analyzer Type:<\/th><td>Quadrupole <\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Source Temp.:<\/th><td>230 \u00b0C<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Quad Temp.:<\/th><td>150 \u00b0C<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Electron Energy:<\/th><td>70 eV<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Solvent Delay Time:<\/th><td>1.5  min<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Tune Type:<\/th><td>BFB <\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Ionization Mode:<\/th><td>EI <\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Scan Range:<\/th><td>36-260 amu<\/td><\/tr><tr class=\"cgram_header_row\"><th class=\"conditions_header\" scope=\"row\">Instrument<\/th><td>Agilent 7890A GC &amp; 5975C MSD<\/td><\/tr><tr class=\"cgram_header_row\"><th class=\"conditions_header\" scope=\"row\">Notes<\/th><td>Other Purge-and-Trap Conditions:<br \/>Sample Inlet: 40\u00b0C<br \/>Sample: 40\u00b0C<br \/>Water Management: Purge 110\u00b0C, Desorb 0\u00b0C, Bake, 240\u00b0C<\/td><\/tr><tr class=\"cgram_header_row\"><th class=\"conditions_header\" scope=\"row\">Acknowledgement<\/th><td>Eclipse 4660 purge-and-trap courtesy of O.I. Analytical, College Station, TX.<\/td><\/tr><\/table><\/div><\/div><\/div><div class=\"chromatogram-pdf-link\"><a href=\"https:\/\/ez.restek.com\/images\/cgram\/gc_ev1169.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:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n        <div class=\"cpb\">\n            <h3 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style=\"height:100px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Analyze volatile compounds and polar analytes with greater confidence using Rxi-624Sil MS columns. 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Includes environmental and pharmaceutical applications.<\/p>\n","protected":false},"author":11,"featured_media":7327,"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":[],"industries-application":[2161,2172],"post-badge":[],"resource-type":[],"product-library":[2372,2384],"resource-technique":[2294,2301],"ppma_author":[414],"class_list":["post-43797","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-articles","industries-application-environmental","industries-application-pharmaceutical-biopharma","product-library-gas-chromatography-products","product-library-gc-columns","resource-technique-gas-chromatography-gc","resource-technique-mass-spectrometry-ms"],"acf":[],"taxonomy_info":{"category":[{"value":7,"label":"Articles"}],"industries-application":[{"value":2161,"label":"Environmental"},{"value":2172,"label":"Pharmaceutical &amp; Biopharma"}],"product-library":[{"value":2372,"label":"Gas Chromatography Products"},{"value":2384,"label":"GC Columns"}],"resource-technique":[{"value":2294,"label":"Gas Chromatography (GC)"},{"value":2301,"label":"Mass Spectrometry (MS)"}]},"featured_image_src_large":["https:\/\/discover.restek.com\/wp-content\/uploads\/feature-GNSS1334-1024x536.jpg",1024,536,true],"author_info":{"display_name":"Restek Corporation","author_link":"https:\/\/discover.restek.com\/it\/author\/restek-corporation\/"},"comment_info":0,"category_info":[{"term_id":7,"name":"Articles","slug":"articles","term_group":0,"term_taxonomy_id":7,"taxonomy":"category","description":"","parent":0,"count":464,"filter":"raw","cat_ID":7,"category_count":464,"category_description":"","cat_name":"Articles","category_nicename":"articles","category_parent":0}],"tag_info":false,"authors":[{"term_id":414,"user_id":11,"is_guest":0,"slug":"restek-corporation","display_name":"Restek Corporation","avatar_url":{"url":"https:\/\/discover.restek.com\/wp-content\/uploads\/Restek_Favicon_300x300.jpg","url2x":"https:\/\/discover.restek.com\/wp-content\/uploads\/Restek_Favicon_300x300.jpg"},"0":null,"1":"","2":"","3":"","4":"","5":"","6":"","7":"","8":""}],"_links":{"self":[{"href":"https:\/\/discover.restek.com\/it\/wp-json\/wp\/v2\/posts\/43797","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/discover.restek.com\/it\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/discover.restek.com\/it\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/discover.restek.com\/it\/wp-json\/wp\/v2\/users\/11"}],"replies":[{"embeddable":true,"href":"https:\/\/discover.restek.com\/it\/wp-json\/wp\/v2\/comments?post=43797"}],"version-history":[{"count":22,"href":"https:\/\/discover.restek.com\/it\/wp-json\/wp\/v2\/posts\/43797\/revisions"}],"predecessor-version":[{"id":79363,"href":"https:\/\/discover.restek.com\/it\/wp-json\/wp\/v2\/posts\/43797\/revisions\/79363"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/discover.restek.com\/it\/wp-json\/wp\/v2\/media\/7327"}],"wp:attachment":[{"href":"https:\/\/discover.restek.com\/it\/wp-json\/wp\/v2\/media?parent=43797"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/discover.restek.com\/it\/wp-json\/wp\/v2\/categories?post=43797"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/discover.restek.com\/it\/wp-json\/wp\/v2\/tags?post=43797"},{"taxonomy":"industries-application","embeddable":true,"href":"https:\/\/discover.restek.com\/it\/wp-json\/wp\/v2\/industries-application?post=43797"},{"taxonomy":"post-badge","embeddable":true,"href":"https:\/\/discover.restek.com\/it\/wp-json\/wp\/v2\/post-badge?post=43797"},{"taxonomy":"resource-type","embeddable":true,"href":"https:\/\/discover.restek.com\/it\/wp-json\/wp\/v2\/resource-type?post=43797"},{"taxonomy":"product-library","embeddable":true,"href":"https:\/\/discover.restek.com\/it\/wp-json\/wp\/v2\/product-library?post=43797"},{"taxonomy":"resource-technique","embeddable":true,"href":"https:\/\/discover.restek.com\/it\/wp-json\/wp\/v2\/resource-technique?post=43797"},{"taxonomy":"author","embeddable":true,"href":"https:\/\/discover.restek.com\/it\/wp-json\/wp\/v2\/ppma_author?post=43797"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}