{"id":43391,"date":"2020-10-29T14:30:00","date_gmt":"2020-10-29T14:30:00","guid":{"rendered":"https:\/\/discover.restek.com\/uncategorized\/optimized-volatiles-analysis-ensures-fast-voc-separations\/"},"modified":"2025-12-09T19:43:37","modified_gmt":"2025-12-09T19:43:37","slug":"optimized-volatiles-analysis-ensures-fast-voc-separations","status":"publish","type":"post","link":"https:\/\/discover.restek.com\/ja\/application-notes\/evan1271\/optimized-volatiles-analysis-ensures-fast-voc-separations","title":{"rendered":"Optimized Volatiles Analysis Ensures Fast VOC Separations"},"content":{"rendered":"\n<ul class=\"wp-block-list\">\n<li>Optimized analysis allows for 36 runs per 12-hour shift, increasing instrument productivity.<\/li>\n\n\n\n<li>Rxi-624Sil MS column inertness gives sharper peaks and more accurate data.<\/li>\n\n\n\n<li>High temperature stability reduces bleed profile, resulting in lower detection limits.<\/li>\n<\/ul>\n\n\n\n<p>Optimized methods for the analysis of volatile organic compounds (VOCs) can be time-consuming to develop because compound lists can be extensive and analytes vary significantly in chemical characteristics. For example, target compounds in EPA Method 8260 for solid waste matrices include volatiles that range from light gases (fluorocarbons) to larger aromatic compounds (trichlorobenzenes). These differences make column selectivity, thermal stability, and inertness critical to resolving volatiles. Often, \u201c624\u201d type columns are chosen for their selectivity, but thermal stability is usually poor, which can result in phase bleed that decreases detector sensitivity. New Rxi-624Sil MS columns offer reliable resolution of critical VOC pairs and also provide lower bleed and greater inertness than other columns. In order to provide optimized conditions for labs analyzing VOCs, we established parameters that ensure good resolution, while reducing downtime by syncing purge and trap cycles with instrument cycles. In addition, we present comparative data that demonstrate why Rxi-624Sil MS columns are the best choice for volatiles analysis.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Resolve Critical Pairs and Reduce Downtime<\/h2>\n\n\n\n<p>In order to achieve desired separations and minimize downtime between injections, several critical pairs were chosen for computational modeling using Pro <em>EZ<\/em>GC software. The temperature program initially determined by the software was 35 \u00b0C (hold 5 min.) to 120 \u00b0C @ 11 \u00b0C\/min. to 220\u00b0C @ 20 \u00b0C\/min. (hold 2 min.). While this provided the best resolution of critical pairs, it also extended the analysis time to 19 min. Since the purge and trap cycle time was 16.5 min., we tested other conditions to see if adequate resolution could be maintained, while using a faster instrument cycle time that more closely matched the purge and trap cycle time, in order to maximize sample throughput. In other calculations, the software suggested changing temperature ramps at 60\u00b0C; therefore, a program of 35\u00b0C (hold 5 min.) to 60\u00b0C @ 11 \u00b0C\/min. to 220\u00b0C @ 20 \u00b0C\/min. (hold 2 min.) was tested. This final program reduced instrument downtime by better synchronizing injection and analysis cycles, and also provided excellent resolution of volatile compounds (Figure 1). Testing of faster conditions determined that the initial hold of 5 minutes at 35\u00b0C was critical for the best separation of early eluting compounds, such as the gases, as well as a favorable elution of methanol between gas compounds.<\/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>\u00a0Rxi-624Sil MS columns resolve methyl ethyl ketone and ethyl acetate, a separation not obtained on other 624 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 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<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Not all &#8220;624s&#8221; are Equivalent<\/h2>\n\n\n\n<p>While optimizing instrument conditions can improve sample throughput, obtaining adequate resolution depends largely on column selectivity, thermal stability, and inertness. Rxi-624Sil MS columns are optimized across these parameters, and therefore provide reliable separation of critical VOCs.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Lower Bleed Means Improved Sensitivity and Longer Column Lifetime<\/h3>\n\n\n\n<p>While 624 type columns generally provide good selectivity for most volatiles, they are limited by their low thermal stability. Poor thermal stability results in phase bleed that can reduce column lifetime, decrease detector sensitivity (especially ion trap mass spectrometers), and interfere with the quantification of later eluting compounds. Rxi-624Sil MS columns have the highest thermal stability and lowest bleed among 624 type columns due to the incorporation of phenyl rings in the polymer backbone (Table I, Figure 2). The conjugated ring system of this silarylene phase provides a more rigid structure that increases thermal stability compared to nonsilarylene phases.<\/p>\n\n\n\n<p><strong>Table I:<\/strong>&nbsp;The Rxi-624Sil MS column has the highest thermal stability of any 624 column.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th><strong>Column<\/strong><\/th><th><strong>Manufacturer<\/strong><\/th><th class=\"has-text-align-center\" data-align=\"center\"><strong>Highest Temperature Limit (Isothermal)<\/strong><\/th><\/tr><\/thead><tbody><tr><td>Rxi-624Sil MS<\/td><td>Restek<\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>320 \u00baC<\/strong><\/td><\/tr><tr><td>VF-624ms<\/td><td>Varian<\/td><td class=\"has-text-align-center\" data-align=\"center\">300 \u00baC<\/td><\/tr><tr><td>DB-624<\/td><td>Agilent J&amp;W<\/td><td class=\"has-text-align-center\" data-align=\"center\">260 \u00baC<\/td><\/tr><tr><td>ZB-624<\/td><td>Phenomenex<\/td><td class=\"has-text-align-center\" data-align=\"center\">260 \u00baC<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n<div class=\"wp-block-custom-chromatogram-article-top\"><div class=\"chromatogram-article-placeholder\"><div class=\"figure-heading\"><strong>Figure 2:<\/strong>\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<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<p><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Better Peak Shape Means More Accurate Results<\/h3>\n\n\n\n<p>Rxi-624Sil MS columns are the most inert 624 column available. Figure 3 shows the differences between vendor columns using primary amines, which are good indicators of column activity. The unique Rxi deactivation results in symmetric peaks with minimal tailing, which improves quantitative accuracy. Minimizing tailing is especially important with concentration techniques, such as purge and trap, since the act of desorbing analytes off of the packing material results in some tailing. If a column is not inert, additional tailing due to column activity can magnify this problem. The sharp, symmetric peaks seen on Rxi-624Sil MS columns allow greater resolution, higher signal-to-noise ratios, and more accurate results for active volatiles such as alcohols (Figure 4).<\/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>\u00a0Highly inert Rxi-624Sil MS columns provide better peak shape and more accurate results for active compounds.<\/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_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 4:<\/strong>\u00a0Obtain more accurate results for active volatiles, such as alcohols, by using highly inert Rxi-624Sil MS 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_ev1175.png\" alt=\"tert-Butyl Alcohol Peak Shape on Rxi-624Sil MS (30 m, 0.25 mm ID, 1.40 \u00b5m)\" title=\"-\"><\/div><p class=\"article-id\" style=\"text-align:center\"> GC_EV1175<\/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 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><\/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, 0.25 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_EV1175\" 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><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<br \/><\/td><\/tr><\/table><\/div><\/div><\/div><div class=\"chromatogram-pdf-link\"><a href=\"https:\/\/ez.restek.com\/images\/cgram\/gc_ev1175.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<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Conclusion<\/h2>\n\n\n\n<p>Labs interested in optimizing resolution and sample throughput can adopt the conditions established here on Rxi-624Sil MS columns to maximize productivity and assure accurate, reliable results.<\/p>\n\n\n\n<div style=\"height:100px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Analytical conditions for GC analysis of volatile organic compounds have been optimized to ensure good resolution of critical pairs, while maximizing sample throughput. Rxi-624Sil MS columns are shown to outperform other 624s.<\/p>\n","protected":false},"author":37,"featured_media":0,"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":[13],"tags":[],"industries-application":[2161],"post-badge":[],"resource-type":[],"product-library":[2372,2384,2399,2374],"resource-technique":[2294,2301],"ppma_author":[600,581,441],"class_list":["post-43391","post","type-post","status-publish","format-standard","hentry","category-application-notes","industries-application-environmental","product-library-gas-chromatography-products","product-library-gc-columns","product-library-liquid-reference-standards","product-library-reference-standard-products","resource-technique-gas-chromatography-gc","resource-technique-mass-spectrometry-ms"],"acf":[],"taxonomy_info":{"category":[{"value":13,"label":"Application 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