{"id":60904,"date":"2026-01-26T12:37:22","date_gmt":"2026-01-26T12:37:22","guid":{"rendered":"https:\/\/discover.restek.com\/?p=60904"},"modified":"2026-03-06T16:04:02","modified_gmt":"2026-03-06T16:04:02","slug":"maximize-confidence-in-seized-drug-identification-by-gc-ms","status":"publish","type":"post","link":"https:\/\/discover.restek.com\/es\/articles\/cffa4918\/maximize-confidence-in-seized-drug-identification-by-gc-ms","title":{"rendered":"Maximize Confidence in Seized Drug Identification by GC-MS"},"content":{"rendered":"\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Next-generation TriMax column deactivation creates a robust neutral surface and exceptionally inert sample flow path.<\/li>\n\n\n\n<li>Maximum inertness improves peak symmetry for a wide range of challenging drug classes.<\/li>\n\n\n\n<li>Stable, symmetrical peaks mean more accurate identification for even the most problematic drugs.<\/li>\n<\/ul>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><a href=\"https:\/\/explore.restek.com\/RMX-contact-technical-service\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"170\" src=\"https:\/\/discover.restek.com\/wp-content\/uploads\/RMX-Graphic-Ad-Contact-us-HTML-Block-TECHNICAL-SERVICE-1024x170.png\" alt=\"helpful person on the phone\" class=\"wp-image-79797\" title=\"-\" srcset=\"https:\/\/discover.restek.com\/wp-content\/uploads\/RMX-Graphic-Ad-Contact-us-HTML-Block-TECHNICAL-SERVICE-1024x170.png 1024w, https:\/\/discover.restek.com\/wp-content\/uploads\/RMX-Graphic-Ad-Contact-us-HTML-Block-TECHNICAL-SERVICE-300x50.png 300w, https:\/\/discover.restek.com\/wp-content\/uploads\/RMX-Graphic-Ad-Contact-us-HTML-Block-TECHNICAL-SERVICE-768x127.png 768w, https:\/\/discover.restek.com\/wp-content\/uploads\/RMX-Graphic-Ad-Contact-us-HTML-Block-TECHNICAL-SERVICE.png 1340w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/figure>\n<\/div>\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><a href=\"https:\/\/explore.restek.com\/RMX-contact-sales\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"170\" src=\"https:\/\/discover.restek.com\/wp-content\/uploads\/RMX-Graphic-Ad-Contact-us-HTML-Block-SALES-1024x170.png\" alt=\"\" class=\"wp-image-79803\" title=\"-\" srcset=\"https:\/\/discover.restek.com\/wp-content\/uploads\/RMX-Graphic-Ad-Contact-us-HTML-Block-SALES-1024x170.png 1024w, https:\/\/discover.restek.com\/wp-content\/uploads\/RMX-Graphic-Ad-Contact-us-HTML-Block-SALES-300x50.png 300w, https:\/\/discover.restek.com\/wp-content\/uploads\/RMX-Graphic-Ad-Contact-us-HTML-Block-SALES-768x127.png 768w, https:\/\/discover.restek.com\/wp-content\/uploads\/RMX-Graphic-Ad-Contact-us-HTML-Block-SALES.png 1340w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/figure>\n<\/div>\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p>Seized drug labs frequently analyze samples via GC-MS to determine if an unknown substance is an illicit drug, and GC column choice plays an integral role in data quality and method reliability. Since a wide variety of chemical compounds need to be identified, midpolarity columns, such as \u201c5 type\u201d columns, are a common choice for drug analysis. Silarylene polymers are structurally modified \u201c5 type\u201d phases that provide enhanced thermal stability, making a \u201c5sil\u201d column the perfect choice for extended lifetime and consistent performance with a mass spectrometer. When analyzing a wide range of drugs, some compound classes exhibit worse behavior than others, which can make drug identification more complex due to tailing peaks and drifting retention times. Acidic compounds (e.g., barbiturates) are prone to uneven phase partitioning due to strong interactions between weakly acidic N-H groups and silanols on the surface of the GC column. Other drugs may have basic functionalities (e.g., amines) and form hydrogen bonds with the surface, again delaying partitioning out of the column phase, or sometimes being completely adsorbed. By preventing surface silanol interactions, seized drug labs can see improved performance for the most problematic compounds across a wide range of functionalities.<\/p>\n\n\n\n<p>To minimize the impact of silanols, Restek has developed a next-generation TriMax deactivation that is applied to all columns in the RMX family. This revolutionary treatment creates a robust, highly inert surface that improves peak shape for a wide range of drug classes. Further, analysts can be confident in column performance because each column is individually QC tested with acidic, basic, and neutral compounds to ensure deactivation effectiveness and process control. This makes RMX-5Sil MS columns\u2014which combine plug-in 5sil polarity, high thermal stability, and maximum surface inertness\u2014ideal for improving seized drug identification (Figure 1). Further, as shown in Figure 2, the RMX-5Sil MS column outperforms a competitor&#8217;s premium column when comparing peak shape for several difficult basic analytes (doxylamine, cyclobenzaprine, codeine) as well as a weakly acidic analyte (alprazolam). Under the same instrument conditions, we can see an improvement in peak shape that can only be attributed to the maximum inertness of the RMX-5Sil MS column surface, which minimizes secondary analyte interactions with silanols that would otherwise cause peak tailing and poor symmetry.<\/p>\n\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n<style>.kb-image60904_eeca21-2e .kb-image-has-overlay:after{opacity:0.3;}<\/style>\n<div class=\"wp-block-kadence-image kb-image60904_eeca21-2e\"><figure class=\"aligncenter size-large\"><a href=\"https:\/\/www.restek.com\/c\/1484\" class=\"kb-advanced-image-link\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"177\" src=\"https:\/\/discover.restek.com\/wp-content\/uploads\/RMX-Graphic-Ad-HTML-Block-with-Topaz-Liners-1024x177.png\" alt=\"ad for RMX columns and Topaz liners\" class=\"kb-img wp-image-89475\" title=\"-\" srcset=\"https:\/\/discover.restek.com\/wp-content\/uploads\/RMX-Graphic-Ad-HTML-Block-with-Topaz-Liners-1024x177.png 1024w, https:\/\/discover.restek.com\/wp-content\/uploads\/RMX-Graphic-Ad-HTML-Block-with-Topaz-Liners-300x52.png 300w, https:\/\/discover.restek.com\/wp-content\/uploads\/RMX-Graphic-Ad-HTML-Block-with-Topaz-Liners-768x133.png 768w, https:\/\/discover.restek.com\/wp-content\/uploads\/RMX-Graphic-Ad-HTML-Block-with-Topaz-Liners.png 1340w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/figure><\/div>\n\n\n<div class=\"wp-block-custom-chromatogram-article-top\"><div class=\"chromatogram-article-placeholder\"><div class=\"figure-heading\"><strong>Figure 1: <\/strong>RMX-5Sil MS columns provide excellent chromatographic results for 34 drugs of abuse analyzed by GC-MS in less than 21 minutes.<\/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_cf1185.png\" alt=\"Acid, Base, and Neutral Drugs and Metabolites on RMX-5Sil MS\" title=\"-\"><\/div><p class=\"article-id\" style=\"text-align:center\"> GC_CF1185<\/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: 75px\">t<sub>R<\/sub> (min)<\/th><th style=\"text-align: center;width: 75px\">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 Propofol\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/2078-54-8\/Propofol\" target=\"_blank\" rel=\"noopener\">Propofol<\/a><\/td><td class=\"oth\">2.53<\/td><td class=\"oth\">25<\/td><\/tr>\n<tr><td class=\"num\">2.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Benzocaine\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/94-09-7\/Benzocaine\" target=\"_blank\" rel=\"noopener\">Benzocaine<\/a><\/td><td class=\"oth\">4.73<\/td><td class=\"oth\">25<\/td><\/tr>\n<tr><td class=\"num\">3.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Butabarbital\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/125-40-6\/Butabarbital\" target=\"_blank\" rel=\"noopener\">Butabarbital<\/a><\/td><td class=\"oth\">6.25<\/td><td class=\"oth\">25<\/td><\/tr>\n<tr><td class=\"num\">4.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Butalbital\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/77-26-9\/Butalbital\" target=\"_blank\" rel=\"noopener\">Butalbital<\/a><\/td><td class=\"oth\">6.33<\/td><td class=\"oth\">25<\/td><\/tr>\n<tr><td class=\"num\">5.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Phenacetin\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/62-44-2\/Phenacetin\" target=\"_blank\" rel=\"noopener\">Phenacetin<\/a><\/td><td class=\"oth\">6.52<\/td><td class=\"oth\">25<\/td><\/tr>\n<tr><td class=\"num\">6.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Cotinine\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/486-56-6\/Cotinine\" target=\"_blank\" rel=\"noopener\">Cotinine<\/a><\/td><td class=\"oth\">6.61<\/td><td class=\"oth\">25<\/td><\/tr>\n<tr><td class=\"num\">7.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Amobarbital\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/57-43-2\/Amobarbital\" target=\"_blank\" rel=\"noopener\">Amobarbital<\/a><\/td><td class=\"oth\">7.17<\/td><td class=\"oth\">25<\/td><\/tr>\n<tr><td class=\"num\">8.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Pentobarbital\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/76-74-4\/Pentobarbital\" target=\"_blank\" rel=\"noopener\">Pentobarbital<\/a><\/td><td class=\"oth\">7.6<\/td><td class=\"oth\">25<\/td><\/tr>\n<tr><td class=\"num\">9.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Secobarbital\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/76-73-3\/Secobarbital\" target=\"_blank\" rel=\"noopener\">Secobarbital<\/a><\/td><td class=\"oth\">8.54<\/td><td class=\"oth\">25<\/td><\/tr>\n<tr><td class=\"num\">10.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Norketamine\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/79499-59-5\/Norketamine\" target=\"_blank\" rel=\"noopener\">Norketamine<\/a><\/td><td class=\"oth\">9.06<\/td><td class=\"oth\">25<\/td><\/tr>\n<tr><td class=\"num\">11.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Prilocaine\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/721-50-6\/Prilocaine\" target=\"_blank\" rel=\"noopener\">Prilocaine<\/a><\/td><td class=\"oth\">9.33<\/td><td class=\"oth\">25<\/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: 75px\">t<sub>R<\/sub> (min)<\/th><th style=\"text-align: center;width: 75px\">Conc.<br \/>(\u00b5g\/mL)<\/th><\/tr><\/thead><tbody>\n<tr><td class=\"num\">12.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Ketamine\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/6740-88-1\/Ketamine\" target=\"_blank\" rel=\"noopener\">Ketamine<\/a><\/td><td class=\"oth\">9.71<\/td><td class=\"oth\">25<\/td><\/tr>\n<tr><td class=\"num\">13.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Diphenhydramine\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/58-73-1\/Diphenhydramine\" target=\"_blank\" rel=\"noopener\">Diphenhydramine<\/a><\/td><td class=\"oth\">10.02<\/td><td class=\"oth\">25<\/td><\/tr>\n<tr><td class=\"num\">14.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Phencyclidine (PCP)\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/77-10-1\/Phencyclidine\" target=\"_blank\" rel=\"noopener\">Phencyclidine (PCP)<\/a><\/td><td class=\"oth\">10.54<\/td><td class=\"oth\">25<\/td><\/tr>\n<tr><td class=\"num\">15.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Doxylamine\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/469-21-6\/Doxylamine\" target=\"_blank\" rel=\"noopener\">Doxylamine<\/a><\/td><td class=\"oth\">10.97<\/td><td class=\"oth\">25<\/td><\/tr>\n<tr><td class=\"num\">16.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Tramadol\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/27203-92-5\/Tramadol\" target=\"_blank\" rel=\"noopener\">Tramadol<\/a><\/td><td class=\"oth\">11.7<\/td><td class=\"oth\">25<\/td><\/tr>\n<tr><td class=\"num\">17.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Phenobarbital\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/50-06-6\/Phenobarbital\" target=\"_blank\" rel=\"noopener\">Phenobarbital<\/a><\/td><td class=\"oth\">12.12<\/td><td class=\"oth\">25<\/td><\/tr>\n<tr><td class=\"num\">18.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Chlorpheniramine\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/132-22-9\/Chlorpheniramine\" target=\"_blank\" rel=\"noopener\">Chlorpheniramine<\/a><\/td><td class=\"oth\">12.92<\/td><td class=\"oth\">25<\/td><\/tr>\n<tr><td class=\"num\">19.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Procaine\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/59-46-1\/Procaine\" target=\"_blank\" rel=\"noopener\">Procaine<\/a><\/td><td class=\"oth\">13.39<\/td><td class=\"oth\">25<\/td><\/tr>\n<tr><td class=\"num\">20.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Venlafaxine\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/93413-69-5\/Venlafaxine\" target=\"_blank\" rel=\"noopener\">Venlafaxine<\/a><\/td><td class=\"oth\">14.65<\/td><td class=\"oth\">25<\/td><\/tr>\n<tr><td class=\"num\">21.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Brompheniramine\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/86-22-6\/Brompheniramine\" target=\"_blank\" rel=\"noopener\">Brompheniramine<\/a><\/td><td class=\"oth\">15.02<\/td><td class=\"oth\">25<\/td><\/tr>\n<tr><td class=\"num\">22.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Methadone\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/76-99-3\/Methadone\" target=\"_blank\" rel=\"noopener\">Methadone<\/a><\/td><td class=\"oth\">15.64<\/td><td class=\"oth\">25<\/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: 75px\">t<sub>R<\/sub> (min)<\/th><th style=\"text-align: center;width: 75px\">Conc.<br \/>(\u00b5g\/mL)<\/th><\/tr><\/thead><tbody>\n<tr><td class=\"num\">23.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Dextromethorphan\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/125-71-3\/Dextromethorphan\" target=\"_blank\" rel=\"noopener\">Dextromethorphan<\/a><\/td><td class=\"oth\">15.69<\/td><td class=\"oth\">25<\/td><\/tr>\n<tr><td class=\"num\">24.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Amitriptyline\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/50-48-6\/Amitriptyline\" target=\"_blank\" rel=\"noopener\">Amitriptyline<\/a><\/td><td class=\"oth\">16.70<\/td><td class=\"oth\">25<\/td><\/tr>\n<tr><td class=\"num\">25.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Cocaine\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/50-36-2\/Cocaine\" target=\"_blank\" rel=\"noopener\">Cocaine<\/a><\/td><td class=\"oth\">16.82<\/td><td class=\"oth\">25<\/td><\/tr>\n<tr><td class=\"num\">26.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Imipramine\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/50-49-7\/Imipramine\" target=\"_blank\" rel=\"noopener\">Imipramine<\/a><\/td><td class=\"oth\">17.03<\/td><td class=\"oth\">25<\/td><\/tr>\n<tr><td class=\"num\">27.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Tetracaine\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/94-24-6\/Tetracaine\" target=\"_blank\" rel=\"noopener\">Tetracaine<\/a><\/td><td class=\"oth\">17.17<\/td><td class=\"oth\">25<\/td><\/tr>\n<tr><td class=\"num\">28.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Cyclobenzaprine\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/303-53-7\/Cyclobenzaprine\" target=\"_blank\" rel=\"noopener\">Cyclobenzaprine<\/a><\/td><td class=\"oth\">17.24<\/td><td class=\"oth\">25<\/td><\/tr>\n<tr><td class=\"num\">29.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Sertraline\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/79617-96-2\/Sertraline\" target=\"_blank\" rel=\"noopener\">Sertraline<\/a><\/td><td class=\"oth\">18.16<\/td><td class=\"oth\">25<\/td><\/tr>\n<tr><td class=\"num\">30.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Codeine\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/76-57-3\/Codeine\" target=\"_blank\" rel=\"noopener\">Codeine<\/a><\/td><td class=\"oth\">18.29<\/td><td class=\"oth\">25<\/td><\/tr>\n<tr><td class=\"num\">31.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for 6-Acetylmorphine\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/2784-73-8\/6-Acetylmorphine\" target=\"_blank\" rel=\"noopener\">6-Acetylmorphine<\/a><\/td><td class=\"oth\">18.96<\/td><td class=\"oth\">25<\/td><\/tr>\n<tr><td class=\"num\">32.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Heroin\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/561-27-3\/Heroin\" target=\"_blank\" rel=\"noopener\">Heroin<\/a><\/td><td class=\"oth\">19.38<\/td><td class=\"oth\">25<\/td><\/tr>\n<tr><td class=\"num\">33.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Zolpidem\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/82626-48-0\/Zolpidem\" target=\"_blank\" rel=\"noopener\">Zolpidem<\/a><\/td><td class=\"oth\">19.97<\/td><td class=\"oth\">25<\/td><\/tr>\n<tr><td class=\"num\">34.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Alprazolam\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/28981-97-7\/Alprazolam\" target=\"_blank\" rel=\"noopener\">Alprazolam<\/a><\/td><td class=\"oth\">20.53<\/td><td class=\"oth\">25<\/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>RMX-5Sil MS, 30 m, 0.25 mm ID, 0.25 \u00b5m (<a target=\"_blank\" href=\"https:\/\/www.restek.com\/p\/17323?utm_source=chromatograms&amp;utm_medium=link&amp;utm_campaign=GC_CF1185\" rel=\"noopener\">cat.# 17323<\/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>Ethyl acetate<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Conc.:<\/th><td>25 ppm<\/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 10:1)<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Liner:<\/th><td>Topaz 4 mm single taper inlet liner with wool  (<a target=\"_blank\" href=\"https:\/\/www.restek.com\/p\/23303?utm_source=chromatograms&amp;utm_medium=link&amp;utm_campaign=GC_CF1185\" rel=\"noopener\">cat.# 23303<\/a>)<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Inj. Temp.:<\/th><td>250 \u00b0C<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Split Vent Flow Rate:<\/th><td>25 mL\/min<\/td><\/tr><tr class=\"cgram_header_row\"><th class=\"conditions_header\" scope=\"row\" colspan=\"2\">Oven<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Oven Temp.:<\/th><td>150 &#176;C (hold 1.0 min) to 210 &#176;C at 4 &#176;C\/min to 320 &#176;C at 30 &#176;C\/min (hold 2.0 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>2.0 mL\/min<tr><th class=\"sub conditions_header\" scope=\"row\">Linear Velocity:<\/th><td>54 cm\/sec @ 150 \u00b0C<\/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>1.0<\/td><td>40-500<\/td><td>1562<\/td><\/tr><\/tbody><\/table><\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Transfer Line Temp.:<\/th><td>280 \u00b0C<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Analyzer Type:<\/th><td>Quadrupole <\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Source Temp.:<\/th><td>230 \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\">Tune Type:<\/th><td>PFTBA <\/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\">Sample Preparation<\/th><td>Individual standards (100 ppm) were combined into a final 25 ppm solution in ethyl acetate.<\/td><\/tr><\/table><\/div><\/div><\/div><div class=\"chromatogram-related-skus\"><h4>Related SKUs<\/h4><ul><li>17323<\/li><li>23303<\/li><\/ul><\/div><div class=\"chromatogram-related-searches\"><h4>Related Searches<\/h4><ul><li>RMX-library<\/li><li>drugs<\/li><li>drugs of abuse<\/li><li>forensic<\/li><li>seized drugs<\/li><li>toxicology<\/li><\/ul><\/div><div class=\"chromatogram-pdf-link\"><a href=\"https:\/\/ez.restek.com\/images\/cgram\/gc_cf1185.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:25px\" 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>Highly inert RMX-5Sil MS columns improve peak shape for challenging acidic and basic drugs, allowing for more confidence in identification.<\/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_cf1186.png\" alt=\"Comparison of Seized Drugs on RMX-5Sil MS and a Premium Competitor Column (Zooms)\" title=\"-\"><\/div><p class=\"article-id\" style=\"text-align:center\"> GC_CF1186<\/p><div class=\"chromatogram-peaks\"><h4>Peaks<\/h4><table class=\"peaks col-lg-6 col-12\">\n<thead><tr><th><\/th><th style=\"text-align: left;width: 75px\">Peaks<\/th><th style=\"text-align: center;width: 75px\">Conc.<br \/>(\u00b5g\/mL)<\/th><th style=\"text-align: center;width: 75px\">t<sub>R<\/sub> (min) for RMX-5Sil MS<\/th><th style=\"text-align: center;width: 75px\">t<sub>R<\/sub> (min) for Premium Competitor Column<\/th><\/tr><\/thead>\n<tbody><tr><td class=\"num\">1.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Doxylamine\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/469-21-6\/Doxylamine\" target=\"_blank\" rel=\"noopener\">Doxylamine<\/a><\/td><td class=\"oth\">25<\/td><td class=\"oth\">10.97<\/td><td class=\"oth\">11.54<\/td><\/tr>\n<tr><td class=\"num\">2.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Cyclobenzaprine\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/303-53-7\/Cyclobenzaprine\" target=\"_blank\" rel=\"noopener\">Cyclobenzaprine<\/a><\/td><td class=\"oth\">25<\/td><td class=\"oth\">17.24<\/td><td class=\"oth\">17.54<\/td><\/tr>\n<tr><td class=\"num\">3.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Codeine\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/76-57-3\/Codeine\" target=\"_blank\" rel=\"noopener\">Codeine<\/a><\/td><td class=\"oth\">25<\/td><td class=\"oth\">18.29<\/td><td class=\"oth\">18.53<\/td><\/tr>\n<tr><td class=\"num\">4.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Alprazolam\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/28981-97-7\/Alprazolam\" target=\"_blank\" rel=\"noopener\">Alprazolam<\/a><\/td><td class=\"oth\">25<\/td><td class=\"oth\">20.53<\/td><td class=\"oth\">20.83<\/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>See notes for names, 30 m, 0.25 mm ID, 0.25 \u00b5m<\/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>Ethyl acetate<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Conc.:<\/th><td>25 ppm<\/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 10:1)<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Liner:<\/th><td>Topaz 4 mm single taper inlet liner with wool  (<a target=\"_blank\" href=\"https:\/\/www.restek.com\/p\/23303?utm_source=chromatograms&amp;utm_medium=link&amp;utm_campaign=GC_CF1186\" rel=\"noopener\">cat.# 23303<\/a>)<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Inj. Temp.:<\/th><td>250 \u00b0C<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Split Vent Flow Rate:<\/th><td>25 mL\/min<\/td><\/tr><tr class=\"cgram_header_row\"><th class=\"conditions_header\" scope=\"row\" colspan=\"2\">Oven<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Oven Temp.:<\/th><td>150 &#176;C (hold 1.0 min) to 210 &#176;C at 4 &#176;C\/min to 320 &#176;C at 30 &#176;C\/min (hold 2.0 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>2.0 mL\/min<tr><th class=\"sub conditions_header\" scope=\"row\">Linear Velocity:<\/th><td>54 cm\/sec @ 150 \u00b0C<\/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>1.0<\/td><td>40-500<\/td><td>1562<\/td><\/tr><\/tbody><\/table><\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Transfer Line Temp.:<\/th><td>280 \u00b0C<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Analyzer Type:<\/th><td>Quadrupole <\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Source Temp.:<\/th><td>230 \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\">Tune Type:<\/th><td>PFTBA <\/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\">Sample Preparation<\/th><td>Individual standards (100 ppm) were combined into a final 25 ppm in ethyl acetate.<\/td><\/tr><tr class=\"cgram_header_row\"><th class=\"conditions_header\" scope=\"row\">Notes<\/th><td>Columns tested: RMX-5Sil MS (<a target=\"_blank\" href=\"https:\/\/www.restek.com\/p\/17323?utm_source=chromatograms&amp;utm_medium=link&amp;utm_campaign=GC_CF1186\" rel=\"noopener\">cat.# 17323<\/a>) and a premium competitor column<\/td><\/tr><\/table><\/div><\/div><\/div><div class=\"chromatogram-related-skus\"><h4>Related SKUs<\/h4><ul><li>23303<\/li><li>17323<\/li><\/ul><\/div><div class=\"chromatogram-related-searches\"><h4>Related Searches<\/h4><ul><li>RMX-library<\/li><li>drugs<\/li><li>drugs of abuse<\/li><li>forensic<\/li><li>seized drugs<\/li><li>toxicology<\/li><\/ul><\/div><div class=\"chromatogram-pdf-link\"><a href=\"https:\/\/ez.restek.com\/images\/cgram\/gc_cf1186.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:25px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><a href=\"https:\/\/discover.restek.com\/articles\/GNOT3445\/ezgc-online-tools\" target=\"_blank\" rel=\" noreferrer noopener\"><img loading=\"lazy\" decoding=\"async\" width=\"1340\" height=\"312\" src=\"https:\/\/discover.restek.com\/wp-content\/uploads\/RMX-Graphic-Ad-EZGC-HTML-Block-Mock-Up.png\" alt=\"EZGC software ad\" class=\"wp-image-61667\" title=\"-\" srcset=\"https:\/\/discover.restek.com\/wp-content\/uploads\/RMX-Graphic-Ad-EZGC-HTML-Block-Mock-Up.png 1340w, https:\/\/discover.restek.com\/wp-content\/uploads\/RMX-Graphic-Ad-EZGC-HTML-Block-Mock-Up-300x70.png 300w, https:\/\/discover.restek.com\/wp-content\/uploads\/RMX-Graphic-Ad-EZGC-HTML-Block-Mock-Up-1024x238.png 1024w, https:\/\/discover.restek.com\/wp-content\/uploads\/RMX-Graphic-Ad-EZGC-HTML-Block-Mock-Up-768x179.png 768w\" sizes=\"auto, (max-width: 1340px) 100vw, 1340px\" \/><\/a><\/figure>\n<\/div>\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><a href=\"https:\/\/discover.restek.com\/RMX\"><img loading=\"lazy\" decoding=\"async\" width=\"1340\" height=\"1220\" src=\"https:\/\/discover.restek.com\/wp-content\/uploads\/RMX-Graphic-Ad-What-Makes-RMX-Better-HTML-1.png\" alt=\"RMX benefits graphic\" class=\"wp-image-61438\" title=\"-\" srcset=\"https:\/\/discover.restek.com\/wp-content\/uploads\/RMX-Graphic-Ad-What-Makes-RMX-Better-HTML-1.png 1340w, https:\/\/discover.restek.com\/wp-content\/uploads\/RMX-Graphic-Ad-What-Makes-RMX-Better-HTML-1-300x273.png 300w, https:\/\/discover.restek.com\/wp-content\/uploads\/RMX-Graphic-Ad-What-Makes-RMX-Better-HTML-1-1024x932.png 1024w, https:\/\/discover.restek.com\/wp-content\/uploads\/RMX-Graphic-Ad-What-Makes-RMX-Better-HTML-1-768x699.png 768w\" sizes=\"auto, (max-width: 1340px) 100vw, 1340px\" \/><\/a><\/figure>\n<\/div>\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n        <div class=\"cpb\">\n            <h3 class=\"cpb-heading\">Products Mentioned<\/h3>\n            <hr class=\"cpb-heading-underline\" \/>\n            <div class=\"cpb-list\">\n                                    <div class=\"cpb-item\">\n                        <div class=\"cpb-col cpb-col--left\">\n                            <a class=\"cpb-catalog\" target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/www.restek.com\/p\/17323\">                                Catalog No. 17323                            <\/a>                        <\/div>\n                        <div class=\"cpb-col cpb-col--middle\">\n                            <div class=\"cpb-title\">RMX-5Sil MS GC Capillary Column, 30 m, 0.25 mm ID, 0.25 \u00b5m<\/div>\n                        <\/div>\n                        <div class=\"cpb-col cpb-col--right\">\n                                                            <a class=\"cpb-view-btn\" target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/www.restek.com\/p\/17323\">View Product<\/a>\n                                                    <\/div>\n                    <\/div>\n                                    <div class=\"cpb-item\">\n                        <div class=\"cpb-col cpb-col--left\">\n                            <a class=\"cpb-catalog\" target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/www.restek.com\/p\/23303\">                                Catalog No. 23303                            <\/a>                        <\/div>\n                        <div class=\"cpb-col cpb-col--middle\">\n                            <div class=\"cpb-title\">Topaz, Single Taper Inlet Liner, 4.0 mm x 6.5 x 78.5, for Agilent GCs, w\/Quartz Wool, Premium Deactivation, 5-pk.<\/div>\n                        <\/div>\n                        <div class=\"cpb-col cpb-col--right\">\n                                                            <a class=\"cpb-view-btn\" target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/www.restek.com\/p\/23303\">View Product<\/a>\n                                                    <\/div>\n                    <\/div>\n                                    <div class=\"cpb-item\">\n                        <div class=\"cpb-col cpb-col--left\">\n                            <a class=\"cpb-catalog\" target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/www.restek.com\/p\/28500\">                                Catalog No. 28500                            <\/a>                        <\/div>\n                        <div class=\"cpb-col cpb-col--middle\">\n                            <div class=\"cpb-title\">Restek Electronic Leak Detector<\/div>\n                        <\/div>\n                        <div class=\"cpb-col cpb-col--right\">\n                                                            <a class=\"cpb-view-btn\" target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/www.restek.com\/p\/28500\">View Product<\/a>\n                                                    <\/div>\n                    <\/div>\n                            <\/div>\n        <\/div>\n        \n\n\n<div style=\"height:100px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n","protected":false},"excerpt":{"rendered":"<p>GC-MS identification of seized drugs can be improved by using an RMX-5Sil MS column because the exceptionally inert surface reduces tailing and improves peak shape for a wide range of drug compound chemistries.<\/p>\n","protected":false},"author":26,"featured_media":61159,"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":[2738],"industries-application":[2153,2156,2170,2171],"post-badge":[29],"resource-type":[2623],"product-library":[2372,2384],"resource-technique":[2294,2301],"hf_cat_post":[2643,2755],"ppma_author":[446,454,2657,452],"class_list":["post-60904","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-articles","tag-rmx-resources","industries-application-clinical","industries-application-clinical-toxicology","industries-application-forensics","industries-application-forensics-toxicology","post-badge-new","resource-type-featured-application","product-library-gas-chromatography-products","product-library-gc-columns","resource-technique-gas-chromatography-gc","resource-technique-mass-spectrometry-ms"],"acf":[],"taxonomy_info":{"category":[{"value":7,"label":"Articles"}],"post_tag":[{"value":2738,"label":"RMX Resources"}],"industries-application":[{"value":2153,"label":"Clinical"},{"value":2156,"label":"Clinical Toxicology"},{"value":2170,"label":"Forensics"},{"value":2171,"label":"Forensics Toxicology"}],"post-badge":[{"value":29,"label":"New"}],"resource-type":[{"value":2623,"label":"Featured Application"}],"product-library":[{"value":2372,"label":"Gas Chromatography Products"},{"value":2384,"label":"GC Columns"}],"resource-technique":[{"value":2294,"label":"Gas Chromatography (GC)"},{"value":2301,"label":"Mass Spectrometry (MS)"}]},"featured_image_src_large":["https:\/\/discover.restek.com\/wp-content\/uploads\/feature-CFFA4918-1024x568.jpg",1024,568,true],"author_info":{"display_name":"Corby Hilliard","author_link":"https:\/\/discover.restek.com\/es\/author\/corby-hilliard\/"},"comment_info":0,"category_info":[{"term_id":7,"name":"Articles","slug":"articles","term_group":0,"term_taxonomy_id":7,"taxonomy":"category","description":"","parent":0,"count":468,"filter":"raw","cat_ID":7,"category_count":468,"category_description":"","cat_name":"Articles","category_nicename":"articles","category_parent":0}],"tag_info":[{"term_id":2738,"name":"RMX Resources","slug":"rmx-resources","term_group":0,"term_taxonomy_id":2738,"taxonomy":"post_tag","description":"Explore RMX Resources Now","parent":0,"count":18,"filter":"raw"}],"authors":[{"term_id":446,"user_id":26,"is_guest":0,"slug":"corby-hilliard","display_name":"Corby 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