{"id":45271,"date":"2020-10-08T14:30:00","date_gmt":"2020-10-08T14:30:00","guid":{"rendered":"https:\/\/discover.restek.com\/uncategorized\/fast-optimized-gc-purge-and-trap-analysis-of-volatiles-for-soil-and-water-methods\/"},"modified":"2025-12-08T14:34:50","modified_gmt":"2025-12-08T14:34:50","slug":"fast-optimized-gc-purge-and-trap-analysis-of-volatiles-for-soil-and-water-methods","status":"publish","type":"post","link":"https:\/\/discover.restek.com\/zh-hans\/articles\/evss2392\/fast-optimized-gc-purge-and-trap-analysis-of-volatiles-for-soil-and-water-methods","title":{"rendered":"Fast, Optimized GC Purge-and-Trap Analysis of Volatiles for Soil and Water Methods"},"content":{"rendered":"\n<h3 class=\"wp-block-heading\">Fast, Optimized GC Purge-and-Trap Analysis of Volatiles for Soil and Water Methods<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Save set-up time\u2014we\u2019ve optimized volatiles analysis for you!<\/li>\n\n\n\n<li>Fit-for-purpose Rtx-VMS column separates early eluting gases and critical VOCs, ensuring rugged, accurate volatiles analysis.<\/li>\n\n\n\n<li>Precisely formulated CRMs ensure accurate quantitation and are backed by Restek\u2019s ISO accreditation and rigorous documentation.<\/li>\n<\/ul>\n\n\n\n<p>Volatile organic compounds (VOCs) pose human health risks and can enter the environment and water supplies through a number of avenues, such as the improper disposal of industrial chemicals (e.g., chlorinated solvents) or the leaking of fuel components from underground storage tanks. Monitoring programs often utilize GC purge-and-trap analysis of volatiles in soil and water samples in order to track VOC contamination. The first fused silica columns used for this analysis were based on diphenyl\/dimethyl polysiloxane stationary phases. However, resolution of gases has always been problematic with these columns. In support of labs conducting purge-and-trap analysis of volatiles, Restek designed the Rtx-VMS column specifically to optimize the separation of commonly analyzed VOCs of environmental concern. The Rtx-VMS column features a stationary phase that is selective for VOCs, a film thickness sufficient to retain and resolve the low boiling volatiles, and enough thermal stability to elute the high boiling VOCs.<\/p>\n\n\n\n<p>Since the Rtx-VMS column has been optimized for volatiles analysis, it provides excellent resolution of critical VOCs, which ensures more accurate quantification in fast analysis times. As shown in the chromatograms below, data quality and lab productivity can be increased using an Rtx-VMS column paired with Restek certified reference materials (CRMs). In the first example, excellent resolution of the 82 drinking water contaminants listed in EPA Method 524.3 was obtained\u2014including&nbsp;<em>o<\/em>-xylene and styrene, which often coelute on other columns. Labs that include the seven volatiles listed in the Unregulated Contaminant Monitoring Rule 3 (UCMR3) in their drinking water analyses will benefit greatly from this application and these products. Having all VOCs packaged in only three ampuls with CRM documentation simplifies the task of calibration. In addition, separating and detecting volatiles using the Rtx-VMS column delivers the best quality data for purge-and-trap analysis of volatiles in drinking water.<\/p>\n\n\n\n<p>The second chromatogram shown below demonstrates the performance of the Rtx-VMS in separating a longer list of volatiles, specifically the 102 VOCs listed in EPA Method 8260. While EPA Method 524.3 was written for purgeable organic compounds in water samples, EPA Method 8260 can be used for purge-and-trap analysis of volatiles in a much more diverse array of sample types (soil, water, solid waste, etc.) In this example, good chromatographic results are again obtained for both early- and late-eluting volatiles, but the separation of oxygenates is particularly noteworthy. Oxygenates are added to gasolines to enhance fuel performance, and they are target compounds in leaking underground storage tank monitoring. Purge-and-trap GC-MS analysis with a highly selective Rtx-VMS column is recommended for this method because key oxygenates\u2014such as methyl&nbsp;<em>tert<\/em>-butyl ether (MTBE) and&nbsp;<em>tert<\/em>-butyl alcohol (TBA)\u2014coelute on other GC columns and they also share the ions used for identification. In addition to separating these components in the reference standards shown below, the Rtx-VMS column can resolve MTBE and TBA as well as additional oxygenates from other target compounds and potentially interfering matrix components in gasoline. To see the separation and identification of 5 ppb oxygenates in a gasoline sample, <a href=\"articles\/analysis-of-trace-oxygenates-in-petroleum-contaminated-wastewater-using-purge-and-trap-GC-MS-US-EPA-methods-5030B--8260\/&quot;\">read our application note<\/a>.<\/p>\n\n\n\n<p>As shown in the chromatograms below, Restek\u2019s combination of CRMs and the Rtx-VMS column are highly effective tools that are optimized for GC purge-and-trap analysis of volatiles. The unique Rtx-VMS column phase offers the best separation of critical compound pairs on the market. In addition, Restek CRMs are comprehensive, manufactured and QC-tested in our ISO-accredited labs, and come complete with all necessary documentation to make your job easier.<\/p>\n\n\n<div class=\"wp-block-custom-chromatogram-article-top\"><div class=\"chromatogram-article-placeholder\"><div class=\"figure-heading\"><\/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_ev1297.png\" alt=\"5 ppb Volatiles in Drinking Water on Rtx-VMS by EPA Method 524.3\" title=\"-\"><\/div><p class=\"article-id\" style=\"text-align:center\"> GC_EV1297<\/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><\/tr><\/thead>\n<tbody><tr><td class=\"num\">1.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Dichlorodifluoromethane\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/75-71-8\/Dichlorodifluoromethane\" target=\"_blank\" rel=\"noopener\">Dichlorodifluoromethane<\/a><\/td><\/tr>\n<tr><td class=\"num\">2.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Chlorodifluoromethane\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/75-45-6\/Chlorodifluoromethane\" target=\"_blank\" rel=\"noopener\">Chlorodifluoromethane<\/a><\/td><\/tr>\n<tr><td class=\"num\">3.<\/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><\/tr>\n<tr><td class=\"num\">4.<\/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><\/tr>\n<tr><td class=\"num\">5.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for 1,3-Butadiene\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/106-99-0\/1,3-Butadiene\" target=\"_blank\" rel=\"noopener\">1,3-Butadiene<\/a><\/td><\/tr>\n<tr><td class=\"num\">6.<\/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><\/tr>\n<tr><td class=\"num\">7.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Trichlorofluoromethane\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/75-69-4\/Trichlorofluoromethane\" target=\"_blank\" rel=\"noopener\">Trichlorofluoromethane<\/a><\/td><\/tr>\n<tr><td class=\"num\">8.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Diethyl ether\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/60-29-7\/Diethyl ether\" target=\"_blank\" rel=\"noopener\">Diethyl ether<\/a><\/td><\/tr>\n<tr><td class=\"num\">9.<\/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><\/tr>\n<tr><td class=\"num\">10.<\/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><\/tr>\n<tr><td class=\"num\">11.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Methyl iodide\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/74-88-4\/Methyl iodide\" target=\"_blank\" rel=\"noopener\">Methyl iodide<\/a><\/td><\/tr>\n<tr><td class=\"num\">12.<\/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><\/tr>\n<tr><td class=\"num\">13.<\/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><\/tr>\n<tr><td class=\"num\">14.<\/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><\/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><\/tr>\n<tr><td class=\"num\">16.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for MTBE-D3 (SS)\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/29366-08-3\/MTBE-D3\" target=\"_blank\" rel=\"noopener\">MTBE-D3 (SS)<\/a><\/td><\/tr>\n<tr><td class=\"num\">17.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for MTBE\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/1634-04-4\/MTBE\" target=\"_blank\" rel=\"noopener\">MTBE<\/a><\/td><\/tr>\n<tr><td class=\"num\">18.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for tert-Butyl alcohol (TBA)\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/75-65-0\/tert-Butyl alcohol\" target=\"_blank\" rel=\"noopener\">tert-Butyl alcohol (TBA)<\/a><\/td><\/tr>\n<tr><td class=\"num\">19.<\/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><\/tr>\n<tr><td class=\"num\">20.<\/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><\/tr>\n<tr><td class=\"num\">21.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for tert-Butyl ethyl ether (ETBE)\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/637-92-3\/tert-Butyl ethyl ether\" target=\"_blank\" rel=\"noopener\">tert-Butyl ethyl ether (ETBE)<\/a><\/td><\/tr>\n<tr><td class=\"num\">22.<\/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><\/tr>\n<tr><td class=\"num\">23.<\/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><\/tr>\n<tr><td class=\"num\">24.<\/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><\/tr>\n<tr><td class=\"num\">25.<\/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><\/tr>\n<tr><td class=\"num\">26.<\/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><\/tr>\n<tr><td class=\"num\">27.<\/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><\/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><\/tr><\/thead><tbody>\n<tr><td class=\"num\">28.<\/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><\/tr>\n<tr><td class=\"num\">29.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for 1-Chlorobutane\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/109-69-3\/1-Chlorobutane\" target=\"_blank\" rel=\"noopener\">1-Chlorobutane<\/a><\/td><\/tr>\n<tr><td class=\"num\">30.<\/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><\/tr>\n<tr><td class=\"num\">31.<\/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><\/tr>\n<tr><td class=\"num\">32.<\/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><\/tr>\n<tr><td class=\"num\">33.<\/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><\/tr>\n<tr><td class=\"num\">34.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for 1,4-Difluorobenzene\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/540-36-3\/1,4-Difluorobenzene\" target=\"_blank\" rel=\"noopener\">1,4-Difluorobenzene<\/a><\/td><\/tr>\n<tr><td class=\"num\">35.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for tert-Amyl ethyl ether (TAEE)\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/919-94-8\/tert-Amyl ethyl ether\" target=\"_blank\" rel=\"noopener\">tert-Amyl ethyl ether (TAEE)<\/a><\/td><\/tr>\n<tr><td class=\"num\">36.<\/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><\/tr>\n<tr><td class=\"num\">37.<\/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><\/tr>\n<tr><td class=\"num\">38.<\/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><\/tr>\n<tr><td class=\"num\">39.<\/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><\/tr>\n<tr><td class=\"num\">40.<\/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><\/tr>\n<tr><td class=\"num\">41.<\/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><\/tr>\n<tr><td class=\"num\">42.<\/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><\/tr>\n<tr><td class=\"num\">43.<\/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><\/tr>\n<tr><td class=\"num\">44.<\/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><\/tr>\n<tr><td class=\"num\">45.<\/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><\/tr>\n<tr><td class=\"num\">46.<\/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><\/tr>\n<tr><td class=\"num\">47.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for 1,2-Dibromoethane\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/106-93-4\/1,2-Dibromoethane\" target=\"_blank\" rel=\"noopener\">1,2-Dibromoethane<\/a><\/td><\/tr>\n<tr><td class=\"num\">48.<\/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><\/tr>\n<tr><td class=\"num\">49.<\/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><\/tr>\n<tr><td class=\"num\">50.<\/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><\/tr>\n<tr><td class=\"num\">51.<\/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><\/tr>\n<tr><td class=\"num\">52.<\/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><\/tr>\n<tr><td class=\"num\">53.<\/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><\/tr>\n<tr><td class=\"num\">54.<\/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><\/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><\/tr><\/thead><tbody>\n<tr><td class=\"num\">55.<\/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><\/tr>\n<tr><td class=\"num\">56.<\/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><\/tr>\n<tr><td class=\"num\">57.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Isopropylbenzene\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/98-82-8\/Isopropylbenzene\" target=\"_blank\" rel=\"noopener\">Isopropylbenzene<\/a><\/td><\/tr>\n<tr><td class=\"num\">58.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for 4-Bromofluorobenzene (SS)\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/460-00-4\/4-Bromofluorobenzene\" target=\"_blank\" rel=\"noopener\">4-Bromofluorobenzene (SS)<\/a><\/td><\/tr>\n<tr><td class=\"num\">59.<\/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><\/tr>\n<tr><td class=\"num\">60.<\/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><\/tr>\n<tr><td class=\"num\">61.<\/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><\/tr>\n<tr><td class=\"num\">62.<\/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><\/tr>\n<tr><td class=\"num\">63.<\/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><\/tr>\n<tr><td class=\"num\">64.<\/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><\/tr>\n<tr><td class=\"num\">65.<\/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><\/tr>\n<tr><td class=\"num\">66.<\/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><\/tr>\n<tr><td class=\"num\">67.<\/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><\/tr>\n<tr><td class=\"num\">68.<\/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><\/tr>\n<tr><td class=\"num\">69.<\/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><\/tr>\n<tr><td class=\"num\">70.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for 4-Isopropyltoluene\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/99-87-6\/4-Isopropyltoluene\" target=\"_blank\" rel=\"noopener\">4-Isopropyltoluene<\/a><\/td><\/tr>\n<tr><td class=\"num\">71.<\/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><\/tr>\n<tr><td class=\"num\">72.<\/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><\/tr>\n<tr><td class=\"num\">73.<\/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><\/tr>\n<tr><td class=\"num\">74.<\/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><\/tr>\n<tr><td class=\"num\">75.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Hexachloroethane\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/67-72-1\/Hexachloroethane\" target=\"_blank\" rel=\"noopener\">Hexachloroethane<\/a><\/td><\/tr>\n<tr><td class=\"num\">76.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for 1,2-Dichlorobenzene-D4 (SS)\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/2199-69-1\/1,2-Dichlorobenzene-D4\" target=\"_blank\" rel=\"noopener\">1,2-Dichlorobenzene-D4 (SS)<\/a><\/td><\/tr>\n<tr><td class=\"num\">77.<\/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><\/tr>\n<tr><td class=\"num\">78.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for 1,2-Dibromo-3-chloropropane\" 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<\/a><\/td><\/tr>\n<tr><td class=\"num\">79.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Hexachlorobutadiene\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/87-68-3\/Hexachlorobutadiene\" target=\"_blank\" rel=\"noopener\">Hexachlorobutadiene<\/a><\/td><\/tr>\n<tr><td class=\"num\">80.<\/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><\/tr>\n<tr><td class=\"num\">81.<\/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><\/tr>\n<tr><td class=\"num\">82.<\/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><\/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>Rtx-VMS, 30 m, 0.25 mm ID, 1.40 \u00b5m (<a target=\"_blank\" href=\"https:\/\/www.restek.com\/p\/19915?utm_source=chromatograms&amp;utm_medium=link&amp;utm_campaign=GC_EV1297\" rel=\"noopener\">cat.# 19915<\/a>)<\/td><\/tr><tr class=\"cgram_header_row\"><th class=\"conditions_header\" scope=\"row\">Standard\/Sample<\/th><td><\/td><\/tr><tr><td><\/td><td>524.3 internal standard\/surrogate mix (<a target=\"_blank\" href=\"https:\/\/www.restek.com\/p\/30017?utm_source=chromatograms&amp;utm_medium=link&amp;utm_campaign=GC_EV1297\" rel=\"noopener\">cat.# 30017<\/a>)<\/td><\/tr><tr><td><\/td><td>524.3 gas calibration mix (<a target=\"_blank\" href=\"https:\/\/www.restek.com\/p\/30014?utm_source=chromatograms&amp;utm_medium=link&amp;utm_campaign=GC_EV1297\" rel=\"noopener\">cat.# 30014<\/a>)<\/td><\/tr><tr><td><\/td><td>524.3 VOA MegaMix standard (<a target=\"_blank\" href=\"https:\/\/www.restek.com\/p\/30013?utm_source=chromatograms&amp;utm_medium=link&amp;utm_campaign=GC_EV1297\" rel=\"noopener\">cat.# 30013<\/a>)<\/td><\/tr>\n<tr><th class=\"sub conditions_header\" scope=\"row\">Diluent:<\/th><td>RO water<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Conc.:<\/th><td>5 ng\/mL (5 mL sample)<\/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\">Liner:<\/th><td>Premium 1.0mm ID straight inlet liner  (<a target=\"_blank\" href=\"https:\/\/www.restek.com\/p\/23333?utm_source=chromatograms&amp;utm_medium=link&amp;utm_campaign=GC_EV1297\" rel=\"noopener\">cat.# 23333<\/a>)<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Inj. Temp.:<\/th><td>200 \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>EST Encon Evolution <\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Trap Type:<\/th><td>Vocarb 3000 <\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Purge:<\/th><td> 11  min, flow 40 mL\/min<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Dry Purge:<\/th><td> 1  min, flow 50 mL\/min<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Desorb:<\/th><td> 1  min @ 260 \u00b0C, flow 30.9 mL\/min<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Bake:<\/th><td> 8  min @ 265 \u00b0C<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Interface Connection:<\/th><td>injection port <\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Transfer Line Temp.:<\/th><td>150 \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>45 &#176;C (hold 4.5 min) to 100 &#176;C at 12 &#176;C\/min to 240 &#176;C at 25 &#176;C\/min (hold 1.32 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>0.9 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\">Scan Program:<\/th><td><\/td><\/tr><tr><td style=\"text-align:left\" colspan=\"2\"><table class=\"conditions_sim\"><thead><tr><th style=\"padding: 0 5px\">Group<\/th><th style=\"padding: 0 5px\">Start Time<br \/>(min)<\/th><th style=\"padding: 0 5px\">Scan Range<br \/>(amu)<\/th><th style=\"padding: 0 5px\">Scan Rate<br \/>(scans\/sec)<\/th><\/tr><\/thead><tbody><tr><td>1<\/td><td>1.5<\/td><td>47\u2013300<\/td><td>5.4<\/td><\/tr><tr><td>2<\/td><td>2.9<\/td><td>35\u2013300<\/td><td>5.19<\/td><\/tr><\/tbody><\/table><\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Transfer Line Temp.:<\/th><td>240 \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 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\">Acknowledgement<\/th><td>EST Analytical provided the Centurion robotic autosampler and Encon Evolution P&amp;T concentrator.<\/td><\/tr><\/table><\/div><\/div><\/div><div class=\"chromatogram-pdf-link\"><a href=\"https:\/\/ez.restek.com\/images\/cgram\/gc_ev1297.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:100px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Restek\u2019s Rtx-VMS column and certified reference materials (CRMs) are highly effective tools optimized for GC purge-and-trap analysis of volatiles. The unique column phase provides the best separation of critical compounds available on the market. In addition, our comprehensive CRMs are manufactured and QC-tested in our ISO-accredited labs to assure quality and make your job easier.<\/p>\n","protected":false},"author":11,"featured_media":6769,"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":[2163,2161,2668,2166],"post-badge":[],"resource-type":[2623],"product-library":[2372,2384,2386,2399,2374],"resource-technique":[2294,2301],"hf_cat_post":[650,2624],"ppma_author":[414],"class_list":["post-45271","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-articles","industries-application-drinking-water-wastewater-testing","industries-application-environmental","industries-application-semivolatiles","industries-application-soil-sediment-biota-testing","resource-type-featured-application","product-library-gas-chromatography-products","product-library-gc-columns","product-library-inlet-supplies","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":7,"label":"Articles"}],"industries-application":[{"value":2163,"label":"Drinking Water &amp; 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