{"id":43727,"date":"2025-10-03T21:35:58","date_gmt":"2025-10-03T21:35:58","guid":{"rendered":"https:\/\/discover.restek.com\/uncategorized\/fast-analysis-of-alkylfurans-by-lpgc-ms\/"},"modified":"2026-01-03T18:30:30","modified_gmt":"2026-01-03T18:30:30","slug":"fast-analysis-of-alkylfurans-by-lpgc-ms","status":"publish","type":"post","link":"https:\/\/discover.restek.com\/zh-hans\/articles\/gnfa4238\/fast-analysis-of-alkylfurans-by-lpgc-ms","title":{"rendered":"Fast Analysis of Alkylfurans by LPGC-MS"},"content":{"rendered":"\n<ul class=\"wp-block-list\">\n<li>2.3x faster than conventional GC-MS analysis.<\/li>\n\n\n\n<li>Reduces helium usage by 72% compared to conventional GC-MS methods.&nbsp;<\/li>\n\n\n\n<li>Rxi-624Sil MS kits are factory connected with a proven leak-free connector making LPGC as simple as a column change.<\/li>\n<\/ul>\n\n\n\n<p>A known toxin in food products generated in heat or sterilization, alkylfurans are an important class of compounds in food safety testing. These potential carcinogens are a global health concern and are commonly analyzed by static headspace or solid phase microextraction coupled with GC-MS. Laboratories analyzing for alkylfurans in food products often work with a high volume of diverse sample types that can make conventional GC-MS analysis costly and time-consuming. Additionally, there are several critical separations that can be troublesome and difficult to resolve.&nbsp;<\/p>\n\n\n\n<p>We developed a novel method to significantly cut down on extended analysis times with our new Rxi-624Sil MS low-pressure GC (LPGC) column kit. This unique column setup lowers the pressure inside the column, allowing for drastic reductions in analysis time and helium usage. Analyzing eight common alkylfurans on the LPGC Rxi-624 Sil MS kit (cat.# 11804), analysis time was reduced from ~12 minutes to ~5 minutes compared to the conventional GC method (see Figure 1 below). Additionally, good resolution was achieved for the critical separations of 2-methylfuran and 3-methylfuran (Peak 2 and Peak 3) along with 2,3-dimethylfuran and 2,5-dimethylfuran (Peak 5 and Peak 6).<\/p>\n\n\n\n<p>A simple column change can lead to significant gains for food safety labs analyzing a high volume of samples. Utilizing a LPGC column significantly reduces analysis time allowing for increased sample throughput while conserving helium. Each of our factory-coupled LPGC kits are individually tested, so you can have the assurance of a leak-free connection. To learn more about the LPGC technique, visit <a href=\"articles\/an-introduction-to-low-pressure-GC-MS-LPGC-MS&quot;\">www.restek.com\/lpgc<\/a><\/p>\n\n\n<div class=\"wp-block-custom-chromatogram-article-top\"><div class=\"chromatogram-article-placeholder\"><div class=\"figure-heading\"><strong>Figure 1:\u00a0<\/strong>Fast GC-MS Analysis of Alkylfurans on LPGC Rxi-624Sil MS<\/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_fs0596.png\" alt=\"Comparison of Conventional and LPGC-MS Analysis of Alkylfurans\" title=\"-\"><\/div><p class=\"article-id\" style=\"text-align:center\"> GC_FS0596<\/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\">t<sub>R<\/sub> (30 m)<\/th><th style=\"text-align: center;width: 75px\">t<sub>R<\/sub> (LPGC)<\/th><th style=\"text-align: center;width: 75px\">Conc. (ppm)<\/th><th style=\"text-align: center;width: 75px\">Quan. Ion<\/th><th style=\"text-align: center;width: 75px\">Qual. Ion<\/th><\/tr><\/thead>\n<tbody><tr><td class=\"num\">1.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Furan\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/110-00-9\/Furan\" target=\"_blank\" rel=\"noopener\">Furan<\/a><\/td><td class=\"oth\">3.03<\/td><td class=\"oth\">0.71<\/td><td class=\"oth\">10<\/td><td class=\"oth\">68<\/td><td class=\"oth\">39<\/td><\/tr>\n<tr><td class=\"num\">2.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for 2-Methylfuran\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/534-22-5\/2-Methylfuran\" target=\"_blank\" rel=\"noopener\">2-Methylfuran<\/a><\/td><td class=\"oth\">5.393<\/td><td class=\"oth\">1.276<\/td><td class=\"oth\">10<\/td><td class=\"oth\">82<\/td><td class=\"oth\">53<\/td><\/tr>\n<tr><td class=\"num\">3.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for 3-Methylfuran\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/930-27-8\/3-Methylfuran\" target=\"_blank\" rel=\"noopener\">3-Methylfuran<\/a><\/td><td class=\"oth\">5.727<\/td><td class=\"oth\">1.374<\/td><td class=\"oth\">10<\/td><td class=\"oth\">82<\/td><td class=\"oth\">53<\/td><\/tr>\n<tr><td class=\"num\">4.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for 2-Ethylfuran\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/3208-16-0\/2-Ethylfuran\" target=\"_blank\" rel=\"noopener\">2-Ethylfuran<\/a><\/td><td class=\"oth\">8.072<\/td><td class=\"oth\">2.172<\/td><td class=\"oth\">10<\/td><td class=\"oth\">81<\/td><td class=\"oth\">96<\/td><\/tr>\n<tr><td class=\"num\">5.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for 2,5-Dimethylfuran\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/625-86-5\/2,5-Dimethylfuran\" target=\"_blank\" rel=\"noopener\">2,5-Dimethylfuran<\/a><\/td><td class=\"oth\">8.208<\/td><td class=\"oth\">2.23<\/td><td class=\"oth\">10<\/td><td class=\"oth\">95<\/td><td class=\"oth\">81<\/td><\/tr>\n<tr><td class=\"num\">6.<\/td><td class=\"cmpd\">2,3-Dimethylfuran<\/td><td class=\"oth\">8.515<\/td><td class=\"oth\">2.357<\/td><td class=\"oth\">10<\/td><td class=\"oth\">95<\/td><td class=\"oth\">81<\/td><\/tr>\n<tr><td class=\"num\">7.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for 2-Butylfuran\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/4466-24-4\/2-Butylfuran\" target=\"_blank\" rel=\"noopener\">2-Butylfuran<\/a><\/td><td class=\"oth\">11.21<\/td><td class=\"oth\">4.199<\/td><td class=\"oth\">10<\/td><td class=\"oth\">81<\/td><td class=\"oth\">124<\/td><\/tr>\n<tr><td class=\"num\">8.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for 2-Pentylfuran\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/3777-69-3\/2-Pentylfuran\" target=\"_blank\" rel=\"noopener\">2-Pentylfuran<\/a><\/td><td class=\"oth\">12.179<\/td><td class=\"oth\">4.896<\/td><td class=\"oth\">10<\/td><td class=\"oth\">81<\/td><td class=\"oth\">138<\/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<\/td><\/tr><tr class=\"cgram_header_row\"><th class=\"conditions_header\" scope=\"row\">Standard\/Sample<\/th><td>Custom furans standard<\/td><\/tr><tr><td><\/td><\/td><\/tr>\n<tr><th class=\"sub conditions_header\" scope=\"row\">Diluent:<\/th><td>Methanol (PT)<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Conc.:<\/th><td>10 \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 100:1)<\/td><\/tr><tr><th class=\"sub conditions_header\" scope=\"row\">Liner:<\/th><td>Topaz, Precision inlet liner, 4.0 mm x 6.3 x 78.5 (<a target=\"_blank\" href=\"https:\/\/www.restek.com\/p\/23305?utm_source=chromatograms&amp;utm_medium=link&amp;utm_campaign=GC_FS0596\" rel=\"noopener\">cat.# 23305<\/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\">Carrier Gas<\/th><td>He<\/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>SIM<\/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\">Quad Temp.:<\/th><td>150 \u00b0C<\/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 7890B GC &amp; 5977A MSD<\/td><\/tr><tr class=\"cgram_header_row\"><th class=\"conditions_header\" scope=\"row\">Sample Preparation<\/th><td>The sample was put in a 2 mL short-cap, screw-thread vial (<a target=\"_blank\" href=\"https:\/\/www.restek.com\/p\/21143?utm_source=chromatograms&amp;utm_medium=link&amp;utm_campaign=GC_FS0596\" rel=\"noopener\">cat.# 21143<\/a>) and capped with a short-cap, screw-vial closure (<a target=\"_blank\" href=\"https:\/\/www.restek.com\/p\/24495?utm_source=chromatograms&amp;utm_medium=link&amp;utm_campaign=GC_FS0596\" rel=\"noopener\">cat.# 24495<\/a>).<\/td><\/tr><tr class=\"cgram_header_row\"><th class=\"conditions_header\" scope=\"row\">Notes<\/th><td><b>Conventional (30 m) Analysis: <\/b><br \/>Column: Rxi-624Sil MS, 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_FS0596\" rel=\"noopener\">cat.# 13868<\/a>)<br \/>Temp. program: 35 \u00b0C (hold 3 min) to 75 \u00b0C at 8 \u00b0C\/min to 280 \u00b0C at 25 \u00b0C\/min (hold 5 min)<br \/>Flow: 1.4 mL\/min<br \/><br \/><b>LPGC-MS Analysis:<\/b><br \/>Column: LPGC  Rxi-624Sil MS column kit, includes 10 m x 0.32 mm ID x 1.8 \u03bcm Rxi-624Sil MS analytical column and 5 m x 0.15 mm ID Rxi restrictor factory connected via SilTite connector (<a target=\"_blank\" href=\"https:\/\/www.restek.com\/p\/11804?utm_source=chromatograms&amp;utm_medium=link&amp;utm_campaign=GC_FS0596\" rel=\"noopener\">cat.# 11804<\/a>)<br \/>Temp. program: 35 \u00b0C (hold 1 min) to 75 \u00b0C at 16 \u00b0C\/min (hold 0 min) to 280 \u00b0C at 35 \u00b0C\/min (hold 5 min)<br \/>Flow: 0.9 mL\/min<br \/><br \/>The injections were performed on different instruments under different head pressures, resulting in different analyte responses.<br \/><br \/>A furan\/alkylfurans standard (<a target=\"_blank\" href=\"https:\/\/www.restek.com\/p\/33334?utm_source=chromatograms&amp;utm_medium=link&amp;utm_campaign=GC_FS0596\" rel=\"noopener\">cat.# 33334<\/a>) is now available.<\/td><\/tr><\/table><\/div><\/div><\/div><div class=\"chromatogram-pdf-link\"><a href=\"https:\/\/ez.restek.com\/images\/cgram\/gc_fs0596.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"18\" height=\"18\" viewBox=\"0 0 18 18\"><g data-name=\"Group 2996\"><path data-name=\"Rectangle 1246\" d=\"M0 0h18v18H0z\" style=\"fill: none;\"><\/path><\/g><g data-name=\"Group 2997\"><path data-name=\"Path 729\" d=\"M13.412 11.4v2.017H5.345V11.4H4v2.017a1.349 1.349 0 0 0 1.345 1.345h8.068a1.349 1.349 0 0 0 1.345-1.345V11.4zm-.672-2.694-.948-.948-1.741 1.735V4H8.706v5.493L6.965 7.758l-.948.948 3.361 3.361z\" transform=\"translate(-.437 -.414)\" style=\"fill: rgb(13, 123, 196);\"><\/path><\/g><\/svg>Download PDF<\/a><\/div><\/div><\/div>\n<\/div><\/div><\/div>\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-columns has-background is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\" style=\"background-color:#fffaf1\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><style>.kb-image43727_6d4181-f8:not(.kb-image-is-ratio-size) .kb-img, .kb-image43727_6d4181-f8.kb-image-is-ratio-size{padding-top:var(--global-kb-spacing-xs, 1rem);padding-right:var(--global-kb-spacing-xs, 1rem);padding-bottom:var(--global-kb-spacing-xs, 1rem);padding-left:var(--global-kb-spacing-xs, 1rem);}.kb-image43727_6d4181-f8 .kb-image-has-overlay:after{opacity:0.3;}<\/style>\n<div class=\"wp-block-kadence-image kb-image43727_6d4181-f8\"><figure class=\"alignright size-medium\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"92\" src=\"https:\/\/discover.restek.com\/wp-content\/uploads\/teaser-product-reference-standards-furan-alkylfurans-300x92.png\" alt=\"\" class=\"kb-img wp-image-29782\" title=\"-\" srcset=\"https:\/\/discover.restek.com\/wp-content\/uploads\/teaser-product-reference-standards-furan-alkylfurans-300x92.png 300w, https:\/\/discover.restek.com\/wp-content\/uploads\/teaser-product-reference-standards-furan-alkylfurans.png 384w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/figure><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">Looking for furan\/alkylfurans standards?<\/h3>\n\n\n\n<p>A furan\/alkylfurans multicomponent standard&nbsp;(cat.# 33334)&nbsp;is now available.<\/p>\n<\/div>\n<\/div>\n\n\n\n<div style=\"height:50px\" 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\/33334\">                                Catalog No. 33334                            <\/a>                        <\/div>\n                        <div class=\"cpb-col cpb-col--middle\">\n                            <div class=\"cpb-title\">Furan\/Alkylfurans Standard, 100 \u00b5g\/mL, P&amp;T Methanol, 1 mL\/ampul<\/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\/33334\">\u67e5\u770b\u4ea7\u54c1<\/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\/11804\">                                Catalog No. 11804                            <\/a>                        <\/div>\n                        <div class=\"cpb-col cpb-col--middle\">\n                            <div class=\"cpb-title\">LPGC Rxi-624Sil MS Column Kit, 0.32 mm ID<\/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\/11804\">\u67e5\u770b\u4ea7\u54c1<\/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\/23305\">                                Catalog No. 23305                            <\/a>                        <\/div>\n                        <div class=\"cpb-col cpb-col--middle\">\n                            <div class=\"cpb-title\">Topaz, Precision Inlet Liner, 4.0 mm x 6.3 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\/23305\">\u67e5\u770b\u4ea7\u54c1<\/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\/23849\">                                Catalog No. 23849                            <\/a>                        <\/div>\n                        <div class=\"cpb-col cpb-col--middle\">\n                            <div class=\"cpb-title\">GC Accelerator Oven Insert Kit, for Agilent 5890, 6890, 7890, and 8890 GCs<\/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\/23849\">\u67e5\u770b\u4ea7\u54c1<\/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\/26552\">                                Catalog No. 26552                            <\/a>                        <\/div>\n                        <div class=\"cpb-col cpb-col--middle\">\n                            <div class=\"cpb-title\">Syringe, Hamilton 1001 (1 mL\/N\/23\/2&quot;\/5pt), High Dynamic (HD) Headspace, for CTC CombiPAL Autosampler<\/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\/26552\">\u67e5\u770b\u4ea7\u54c1<\/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\/28903-1\">                                Catalog No. 28903-1                            <\/a>                        <\/div>\n                        <div class=\"cpb-col cpb-col--middle\">\n                            <div class=\"cpb-title\">PAL Smart SPME Arrow 1.10 mm: Carbon-WR\/PDMS, Phase Thickness 120 \u00b5m, Phase Length 20 mm, Light Blue, ea.<\/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\/28903-1\">\u67e5\u770b\u4ea7\u54c1<\/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\/21143\">                                Catalog No. 21143                            <\/a>                        <\/div>\n                        <div class=\"cpb-col cpb-col--middle\">\n                            <div class=\"cpb-title\">Short-Cap Vial with Grad Marking Spot, 9-425 Screw-Thread, 2 mL, 9 mm, 12 x 32 (vial only), Amber, 1000-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\/21143\">\u67e5\u770b\u4ea7\u54c1<\/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\/24495\">                                Catalog No. 24495                            <\/a>                        <\/div>\n                        <div class=\"cpb-col cpb-col--middle\">\n                            <div class=\"cpb-title\">Short Screw Caps, Polypropylene, Screw-Thread, PTFE\/Silicone\/PTFE Septa, Black, Preassembled, 2.0 mL, 9 mm, 100-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\/24495\">\u67e5\u770b\u4ea7\u54c1<\/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>This fast analysis of alkylfurans by low-pressure GC-MS is 2.3x faster than conventional GC-MS analysis and offers up to 72% helium 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