{"id":43465,"date":"2025-10-03T21:13:35","date_gmt":"2025-10-03T21:13:35","guid":{"rendered":"https:\/\/discover.restek.com\/uncategorized\/pfas-analysis-by-astm-d7979-20-for-water-sludge-influent-effluent-and-wastewater\/"},"modified":"2026-03-30T20:02:56","modified_gmt":"2026-03-30T20:02:56","slug":"pfas-analysis-by-astm-d7979-20-for-water-sludge-influent-effluent-and-wastewater","status":"publish","type":"post","link":"https:\/\/discover.restek.com\/it\/articles-zh\/evar4304\/pfas-analysis-by-astm-d7979-20-for-water-sludge-influent-effluent-and-wastewater","title":{"rendered":"PFAS Analysis by ASTM D7979-20 for Water, Sludge, Influent, Effluent, and Wastewater"},"content":{"rendered":"\n<ul class=\"wp-block-list\">\n<li><strong>Sample Matrix:<\/strong> water, sludge, influent, effluent, and wastewater samples<\/li>\n\n\n\n<li><strong>Sample Preparation: <\/strong>filtration<\/li>\n\n\n\n<li><strong>Detection Technique: <\/strong>LC-MS\/MS<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Standard Test Method for Determination of Per- and Polyfluoroalkyl Substances in Water, Sludge, Influent, Effluent, and Wastewater by Liquid Chromatography Tandem Mass Spectrometry (LC-MS\/MS)<\/h2>\n\n\n\n<p>ASTM D7979-20 is used for the analysis of 21 PFAS in water, sludge, influent, effluent, and wastewater samples. It combines filtration sample preparation with LC-MS\/MS analysis. D7979-20 is not available from Restek, but it may be purchased from ASTM. The full analyte list and products recommended by Restek are provided below. In addition, you can register and directly\u00a0<a href=\"https:\/\/explore.restek.com\/PFAS-Guides\" target=\"_blank\" rel=\"noreferrer noopener\">compare analyte lists and matrices across PFAS analysis methods here<\/a>\u00a0or visit <a href=\"https:\/\/discover.restek.com\/pfas-analysis\/\" data-type=\"link\" data-id=\"https:\/\/discover.restek.com\/pfas-analysis\/\">www.restek.com\/PFAS<\/a> to explore our technical resources for PFAS analysis.<\/p>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link has-background wp-element-button\" href=\"https:\/\/www.astm.org\/d7979-20.html\" style=\"background-color:#015e9a;padding-right:50px;padding-left:50px\" target=\"_blank\" rel=\"noreferrer noopener\">Access Method<\/a><\/div>\n<\/div>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">Analyte List for ASTM D7979-20 for PFAS Analysis<\/h3>\n\n\n\n<p>PFAS acronyms, compound names, and CAS numbers vary across methods and guidelines, and they also depend on compound form (e.g., neutral vs. salt). The following list uses standardized terminology to allow easy comparison across the methods and guidelines in our <a href=\"https:\/\/explore.restek.com\/PFAS-Guides\" target=\"_blank\" rel=\"noreferrer noopener\">comprehensive guide<\/a>. Please refer to ASTM D7979-20 for method-specific nomenclature.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Acronym<\/strong><\/td><td><strong>Compound Name<\/strong><\/td><td><strong>CAS#<\/strong><\/td><\/tr><tr><td>PFBS<\/td><td>Perfluoro-1-butanesulfonic acid<\/td><td>375-73-5<\/td><\/tr><tr><td>PFDA<\/td><td>Perfluorodecanoic acid<\/td><td>335-76-2<\/td><\/tr><tr><td>PFDoA<\/td><td>Perfluorododecanoic acid<\/td><td>307-55-1<\/td><\/tr><tr><td>PFHpA<\/td><td>Perfluoroheptanoic acid<\/td><td>375-85-9<\/td><\/tr><tr><td>PFHxS<\/td><td>Perfluoro-1-hexanesulfonic acid<\/td><td>355-46-4<\/td><\/tr><tr><td>PFHxA<\/td><td>Perfluorohexanoic acid<\/td><td>307-24-4<\/td><\/tr><tr><td>PFNA<\/td><td>Perfluorononanoic acid<\/td><td>375-95-1<\/td><\/tr><tr><td>PFOS<\/td><td>Perfluorooctanesulfonic acid<\/td><td>1763-23-1<\/td><\/tr><tr><td>PFOA<\/td><td>Perfluorooctanoic acid<\/td><td>335-67-1<\/td><\/tr><tr><td>PFTeDA<\/td><td>Perfluorotetradecanoic acid<\/td><td>376-06-7<\/td><\/tr><tr><td>PFTrDA<\/td><td>Perfluorotridecanoic acid<\/td><td>72629-94-8<\/td><\/tr><tr><td>PFUnA<\/td><td>Perfluoroundecanoic acid<\/td><td>2058-94-8<\/td><\/tr><tr><td>PFBA<\/td><td>Perfluorobutanoic acid<\/td><td>375-22-4<\/td><\/tr><tr><td>PFPeA<\/td><td>Perfluoropentanoic acid<\/td><td>2706-90-3<\/td><\/tr><tr><td>8:2 FTUCA, FOUEA<\/td><td>2<em>H<\/em>-perfluoro-2-decenoic acid<\/td><td>70887-84-2<\/td><\/tr><tr><td>PFecHS<\/td><td>Decafluoro-4-(pentafluoroethyl)cyclohexanesulfonate<\/td><td>646-83-3 (67584-42-3)<\/td><\/tr><tr><td>6:2FTCA, 6:2 FHEA<\/td><td>2-perfluorohexyl ethanoic acid<\/td><td>53826-12-3<\/td><\/tr><tr><td>8:2 FOEA<\/td><td>2-perfluorooctyl ethanoic acid<\/td><td>27854-31-5<\/td><\/tr><tr><td>10:2 FDEA<\/td><td>2-perfluorodecyl ethanoic acid<\/td><td>53826-13-4<\/td><\/tr><tr><td>6:2 FHUEA<\/td><td>2<em>H<\/em>-perfluoro-2-octenoic acid<\/td><td>70887-88-6<\/td><\/tr><tr><td>7:3 FTCA, FHpPA<\/td><td>7:3 Fluorotelomer carboxylic acid or 3-perfluoroheptyl propanoic acid<\/td><td>812-70-4<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link has-background wp-element-button\" href=\"https:\/\/explore.restek.com\/PFAS-Guides\" style=\"background-color:#015e9a;padding-right:50px;padding-left:50px\" target=\"_blank\" rel=\"noreferrer noopener\">Want to compare analyte lists? <em>Check out our guide!<\/em><\/a><\/div>\n<\/div>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">Recommended Products for ASTM D7979-20 for PFAS Analysis<\/h3>\n\n\n\n<div style=\"height:20px\" 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\/9304A52\">                                Catalog No. 9304A52                            <\/a>                        <\/div>\n                        <div class=\"cpb-col cpb-col--middle\">\n                            <div class=\"cpb-title\">Colonna HPLC Raptor C18, 2,7 \u00b5m, 50 x 2,1 mm<\/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\/9304A52\">Esplora Prodotto<\/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\/9634252\">                                Catalog No. 9634252                            <\/a>                        <\/div>\n                        <div class=\"cpb-col cpb-col--middle\">\n                            <div class=\"cpb-title\">Colonna LC Force C18, 1,8 \u00b5m, 50 x 2,1 mm<\/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\/9634252\">Esplora Prodotto<\/a>\n                                                    <\/div>\n                    <\/div>\n                            <\/div>\n        <\/div>\n        \n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n        <div class=\"cpb\">\n            <h3 class=\"cpb-heading\">Delay Columns:<\/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\/27854\">                                Catalog No. 27854                            <\/a>                        <\/div>\n                        <div class=\"cpb-col cpb-col--middle\">\n                            <div class=\"cpb-title\">PFAS Delay Column, 5 \u00b5m, 50 x 2,1 mm, colonna HPLC<\/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\/27854\">Esplora Prodotto<\/a>\n                                                    <\/div>\n                    <\/div>\n                            <\/div>\n        <\/div>\n        \n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p>PFAS delay column: 5 \u00b5m, 50 x 3.0 mm (cat.# 580959 [custom product])<\/p>\n\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\">Guard Columns:<\/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\/25809\">                                Catalog No. 25809                            <\/a>                        <\/div>\n                        <div class=\"cpb-col cpb-col--middle\">\n                            <div class=\"cpb-title\">Filtro precolonna UHPLC UltraShield, frit 0,2 \u00b5m, cad.<\/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\/25809\">Esplora Prodotto<\/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\/25808\">                                Catalog No. 25808                            <\/a>                        <\/div>\n                        <div class=\"cpb-col cpb-col--middle\">\n                            <div class=\"cpb-title\">Holder EXP a connessione diretta per cartucce per precolonne EXP, comprende raccordo e ferrule<\/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\/25808\">Esplora Prodotto<\/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\/9304A0252\">                                Catalog No. 9304A0252                            <\/a>                        <\/div>\n                        <div class=\"cpb-col cpb-col--middle\">\n                            <div class=\"cpb-title\">Cartuccia per precolonna Raptor C18 EXP, 2,7 \u00b5m, 5 x 2,1 mm, 3 pz.<\/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\/9304A0252\">Esplora Prodotto<\/a>\n                                                    <\/div>\n                    <\/div>\n                            <\/div>\n        <\/div>\n        \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\">Sample Prep:<\/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\/28935\">                                Catalog No. 28935                            <\/a>                        <\/div>\n                        <div class=\"cpb-col cpb-col--middle\">\n                            <div class=\"cpb-title\">Filtro siringa da 25 mm, 0,22 \u00b5m, polipropilene, blu, Luer-Lock, 100 pz.<\/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\/28935\">Esplora Prodotto<\/a>\n                                                    <\/div>\n                    <\/div>\n                            <\/div>\n        <\/div>\n        \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\">General Lab Supplies:<\/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\/23243\">                                Catalog No. 23243                            <\/a>                        <\/div>\n                        <div class=\"cpb-col cpb-col--middle\">\n                            <div class=\"cpb-title\">Vial a volume ridotto in polipropilene con filettatura, 9 mm, 700 \u00b5L, 12 x 32 mm, 100 pz.<\/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\/23243\">Esplora Prodotto<\/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\/23246\">                                Catalog No. 23246                            <\/a>                        <\/div>\n                        <div class=\"cpb-col cpb-col--middle\">\n                            <div class=\"cpb-title\">Vial a volume ridotto in polipropilene con filettatura, 9 mm, 700 \u00b5L, 12 x 32 mm, 1000 pz.<\/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\/23246\">Esplora Prodotto<\/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\/23244\">                                Catalog No. 23244                            <\/a>                        <\/div>\n                        <div class=\"cpb-col cpb-col--middle\">\n                            <div class=\"cpb-title\">Tappi in polietilene da 2,0 mL con top solido di 9 mm, filettatura, membrana spessore 10 mm, trasparente, 100 pz.<\/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\/23244\">Esplora Prodotto<\/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\/23247\">                                Catalog No. 23247                            <\/a>                        <\/div>\n                        <div class=\"cpb-col cpb-col--middle\">\n                            <div class=\"cpb-title\">Tappi in polietilene da 2,0 mL con top solido di 9 mm, filettatura, membrana spessore 10 mm, trasparente, 1000 pz.<\/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\/23247\">Esplora Prodotto<\/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\/25846\">                                Catalog No. 25846                            <\/a>                        <\/div>\n                        <div class=\"cpb-col cpb-col--middle\">\n                            <div class=\"cpb-title\">Provette da centrifuga vuote da 50 ml, Polipropilene con tappo, 50 provette, 50-conf.<\/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\/25846\">Esplora Prodotto<\/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\/28290\">                                Catalog No. 28290                            <\/a>                        <\/div>\n                        <div class=\"cpb-col cpb-col--middle\">\n                            <div class=\"cpb-title\">Provette da centrifuga vuote da 50 ml, Polipropilene con tappo, 50 provette, 500-conf.<\/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\/28290\">Esplora Prodotto<\/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\/22775\">                                Catalog No. 22775                            <\/a>                        <\/div>\n                        <div class=\"cpb-col cpb-col--middle\">\n                            <div class=\"cpb-title\">Siringa di Plastica Norm-Ject, Luer Lock Tip, graduazione fino a 12 mL, 10 mL, Conf. da 100<\/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\/22775\">Esplora Prodotto<\/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\/22774\">                                Catalog No. 22774                            <\/a>                        <\/div>\n                        <div class=\"cpb-col cpb-col--middle\">\n                            <div class=\"cpb-title\">Siringa di Plastica Norm-Ject, Luer Lock Tip, graduazione fino a 6 mL, 5 mL, Conf. da 100<\/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\/22774\">Esplora Prodotto<\/a>\n                                                    <\/div>\n                    <\/div>\n                            <\/div>\n        <\/div>\n        \n\n\n<p>* Note that ASTM methods refer to the use of a glass syringe. Norm-Ject plastic syringes are made from polypropylene\/polyethylene and can be used as an alternative.<\/p>\n\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">Discover More Solutions for PFAS Analysis!<\/h3>\n\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n<style>.wp-block-kadence-advancedbtn.kb-btns43465_157ee7-dd{gap:var(--global-kb-gap-md, 2rem);justify-content:center;align-items:center;}.kt-btns43465_157ee7-dd .kt-button{font-weight:normal;font-style:normal;}.kt-btns43465_157ee7-dd .kt-btn-wrap-0{margin-right:5px;}.wp-block-kadence-advancedbtn.kt-btns43465_157ee7-dd .kt-btn-wrap-0 .kt-button{color:#555555;border-color:#555555;}.wp-block-kadence-advancedbtn.kt-btns43465_157ee7-dd .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns43465_157ee7-dd .kt-btn-wrap-0 .kt-button:focus{color:#ffffff;border-color:#444444;}.wp-block-kadence-advancedbtn.kt-btns43465_157ee7-dd .kt-btn-wrap-0 .kt-button::before{display:none;}.wp-block-kadence-advancedbtn.kt-btns43465_157ee7-dd .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns43465_157ee7-dd .kt-btn-wrap-0 .kt-button:focus{background:#444444;}<\/style>\n<div class=\"wp-block-kadence-advancedbtn kb-buttons-wrap kb-btns43465_157ee7-dd\"><style>ul.menu .wp-block-kadence-advancedbtn .kb-btn43465_d3337a-a8.kb-button{width:initial;}<\/style><a class=\"kb-button kt-button button kb-btn43465_d3337a-a8 kt-btn-size-large kt-btn-width-type-full kb-btn-global-fill  kt-btn-has-text-true kt-btn-has-svg-false  wp-block-kadence-singlebtn\" href=\"https:\/\/discover.restek.com\/articles\/evar3552\/guide-to-pfas-testing-methods\"><span class=\"kt-btn-inner-text\">Access Other PFAS Methods<\/span><\/a>\n\n<style>ul.menu .wp-block-kadence-advancedbtn .kb-btn43465_a73e5c-80.kb-button{width:initial;}<\/style><a class=\"kb-button kt-button button kb-btn43465_a73e5c-80 kt-btn-size-large kt-btn-width-type-full kb-btn-global-fill  kt-btn-has-text-true kt-btn-has-svg-false  wp-block-kadence-singlebtn\" href=\"https:\/\/discover.restek.com\/articles\/EVAR3498\/lab-supplies-for-pfas-analysis\/\"><span class=\"kt-btn-inner-text\">Compare Product Lists<\/span><\/a>\n\n<style>ul.menu .wp-block-kadence-advancedbtn .kb-btn43465_1948fe-74.kb-button{width:initial;}<\/style><a class=\"kb-button kt-button button kb-btn43465_1948fe-74 kt-btn-size-large kt-btn-width-type-full kb-btn-global-fill  kt-btn-has-text-true kt-btn-has-svg-false  wp-block-kadence-singlebtn\" href=\"https:\/\/discover.restek.com\/pfas-analysis\/\"><span class=\"kt-btn-inner-text\">Explore More Technical Resources<\/span><\/a><\/div>\n\n\n\n<div class=\"wp-block-group hub-fullwidth-container\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\"><style>.kadence-column43465_8c0726-2f > .kt-inside-inner-col,.kadence-column43465_8c0726-2f > .kt-inside-inner-col:before{border-top-left-radius:16px;border-top-right-radius:16px;border-bottom-right-radius:16px;border-bottom-left-radius:16px;}.kadence-column43465_8c0726-2f > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column43465_8c0726-2f > .kt-inside-inner-col{flex-direction:column;}.kadence-column43465_8c0726-2f > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column43465_8c0726-2f > .kt-inside-inner-col{background-color:var(--global-palette2, #2B6CB0);background-image:url('https:\/\/discover.restek.com\/wp-content\/uploads\/GNLP4243-ad-ezlc-for-PFAS-desktop-1.jpg');background-size:cover;background-position:50% 0%;background-attachment:scroll;background-repeat:no-repeat;}.kadence-column43465_8c0726-2f > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column43465_8c0726-2f{position:relative;}.kadence-column43465_8c0726-2f, .kt-inside-inner-col > .kadence-column43465_8c0726-2f:not(.specificity){margin-top:45px;margin-bottom:10px;}@media all and (max-width: 1024px){.kadence-column43465_8c0726-2f > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column43465_8c0726-2f > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column43465_8c0726-2f kvs-sm-false hub-guttered-centered-container\"><div class=\"kt-inside-inner-col\"><style>.kb-row-layout-id43465_a7b55f-8e > .kt-row-column-wrap{align-content:start;}:where(.kb-row-layout-id43465_a7b55f-8e > .kt-row-column-wrap) > .wp-block-kadence-column{justify-content:start;}.kb-row-layout-id43465_a7b55f-8e > .kt-row-column-wrap{column-gap:var(--global-kb-gap-md, 2rem);row-gap:var(--global-kb-gap-md, 2rem);padding-top:48px;padding-right:48px;padding-bottom:48px;padding-left:48px;grid-template-columns:minmax(0, calc(65% - ((var(--global-kb-gap-md, 2rem) * 1 )\/2)))minmax(0, calc(35% - ((var(--global-kb-gap-md, 2rem) * 1 )\/2)));}.kb-row-layout-id43465_a7b55f-8e > .kt-row-layout-overlay{opacity:0.30;}@media all and (max-width: 1024px){.kb-row-layout-id43465_a7b55f-8e > .kt-row-column-wrap{grid-template-columns:minmax(0, 2fr) minmax(0, 1fr);}}@media all and (max-width: 767px){.kb-row-layout-id43465_a7b55f-8e > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr);}}<\/style><div class=\"kb-row-layout-wrap kb-row-layout-id43465_a7b55f-8e alignnone wp-block-kadence-rowlayout\"><div class=\"kt-row-column-wrap kt-has-2-columns kt-row-layout-left-golden kt-tab-layout-inherit kt-mobile-layout-row kt-row-valign-top\">\n<style>.kadence-column43465_5222a6-fc > .kt-inside-inner-col{display:flex;}.kadence-column43465_5222a6-fc > .kt-inside-inner-col,.kadence-column43465_5222a6-fc > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column43465_5222a6-fc > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column43465_5222a6-fc > .kt-inside-inner-col{flex-direction:column;justify-content:center;}.kadence-column43465_5222a6-fc > .kt-inside-inner-col > .aligncenter{width:100%;}.kt-row-column-wrap > .kadence-column43465_5222a6-fc{align-self:center;}.kt-inner-column-height-full:not(.kt-has-1-columns) > .wp-block-kadence-column.kadence-column43465_5222a6-fc{align-self:auto;}.kt-inner-column-height-full:not(.kt-has-1-columns) > .wp-block-kadence-column.kadence-column43465_5222a6-fc > .kt-inside-inner-col{flex-direction:column;justify-content:center;}.kadence-column43465_5222a6-fc > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column43465_5222a6-fc{position:relative;}@media all and (max-width: 1024px){.kt-row-column-wrap > .kadence-column43465_5222a6-fc{align-self:center;}}@media all and (max-width: 1024px){.kt-inner-column-height-full:not(.kt-has-1-columns) > .wp-block-kadence-column.kadence-column43465_5222a6-fc{align-self:auto;}}@media all and (max-width: 1024px){.kt-inner-column-height-full:not(.kt-has-1-columns) > .wp-block-kadence-column.kadence-column43465_5222a6-fc > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 1024px){.kadence-column43465_5222a6-fc > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kt-row-column-wrap > .kadence-column43465_5222a6-fc{align-self:center;}.kt-inner-column-height-full:not(.kt-has-1-columns) > .wp-block-kadence-column.kadence-column43465_5222a6-fc{align-self:auto;}.kt-inner-column-height-full:not(.kt-has-1-columns) > .wp-block-kadence-column.kadence-column43465_5222a6-fc > .kt-inside-inner-col{flex-direction:column;justify-content:center;}.kadence-column43465_5222a6-fc > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column43465_5222a6-fc\"><div class=\"kt-inside-inner-col\"><\/div><\/div>\n\n\n<style>.kadence-column43465_942be8-3a > .kt-inside-inner-col,.kadence-column43465_942be8-3a > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column43465_942be8-3a > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column43465_942be8-3a > .kt-inside-inner-col{flex-direction:column;}.kadence-column43465_942be8-3a > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column43465_942be8-3a > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column43465_942be8-3a{position:relative;}@media all and (max-width: 1024px){.kadence-column43465_942be8-3a > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column43465_942be8-3a > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column43465_942be8-3a\"><div class=\"kt-inside-inner-col\"><style>.wp-block-kadence-advancedheading.kt-adv-heading43465_66903d-de, .wp-block-kadence-advancedheading.kt-adv-heading43465_66903d-de[data-kb-block=\"kb-adv-heading43465_66903d-de\"]{text-align:center;font-size:48px;line-height:54px;font-weight:400;font-style:normal;font-family:Inter;text-transform:none;}.wp-block-kadence-advancedheading.kt-adv-heading43465_66903d-de mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading43465_66903d-de[data-kb-block=\"kb-adv-heading43465_66903d-de\"] mark.kt-highlight{font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}.wp-block-kadence-advancedheading.kt-adv-heading43465_66903d-de img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading43465_66903d-de[data-kb-block=\"kb-adv-heading43465_66903d-de\"] img.kb-inline-image{width:150px;vertical-align:baseline;}@media all and (max-width: 767px){.wp-block-kadence-advancedheading.kt-adv-heading43465_66903d-de, .wp-block-kadence-advancedheading.kt-adv-heading43465_66903d-de[data-kb-block=\"kb-adv-heading43465_66903d-de\"]{font-size:36px;}}<\/style>\n<h2 class=\"kt-adv-heading43465_66903d-de wp-block-kadence-advancedheading has-theme-palette-9-color has-text-color\" data-kb-block=\"kb-adv-heading43465_66903d-de\">Start Saving <br>Time Today<\/h2>\n\n\n<style>.wp-block-kadence-advancedheading.kt-adv-heading43465_4df651-b8, .wp-block-kadence-advancedheading.kt-adv-heading43465_4df651-b8[data-kb-block=\"kb-adv-heading43465_4df651-b8\"]{text-align:center;font-size:20px;font-weight:400;font-style:normal;font-family:'Open Sans';color:#dee2e6;}.wp-block-kadence-advancedheading.kt-adv-heading43465_4df651-b8 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading43465_4df651-b8[data-kb-block=\"kb-adv-heading43465_4df651-b8\"] mark.kt-highlight{font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}.wp-block-kadence-advancedheading.kt-adv-heading43465_4df651-b8 img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading43465_4df651-b8[data-kb-block=\"kb-adv-heading43465_4df651-b8\"] img.kb-inline-image{width:150px;vertical-align:baseline;}@media all and (max-width: 767px){.wp-block-kadence-advancedheading.kt-adv-heading43465_4df651-b8, .wp-block-kadence-advancedheading.kt-adv-heading43465_4df651-b8[data-kb-block=\"kb-adv-heading43465_4df651-b8\"]{font-size:16px;}}<\/style>\n<p class=\"kt-adv-heading43465_4df651-b8 wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading43465_4df651-b8\">Develop PFAS Methods in Minutes with our Pro&nbsp;<em>EZ<\/em>LC Chromatogram Modeler<\/p>\n\n\n<style>.wp-block-kadence-advancedbtn.kb-btns43465_3d8502-f0{gap:var(--global-kb-gap-xs, 0.5rem );justify-content:center;align-items:center;}.kt-btns43465_3d8502-f0 .kt-button{font-weight:normal;font-style:normal;}.kt-btns43465_3d8502-f0 .kt-btn-wrap-0{margin-right:5px;}.wp-block-kadence-advancedbtn.kt-btns43465_3d8502-f0 .kt-btn-wrap-0 .kt-button{color:#555555;border-color:#555555;}.wp-block-kadence-advancedbtn.kt-btns43465_3d8502-f0 .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns43465_3d8502-f0 .kt-btn-wrap-0 .kt-button:focus{color:#ffffff;border-color:#444444;}.wp-block-kadence-advancedbtn.kt-btns43465_3d8502-f0 .kt-btn-wrap-0 .kt-button::before{display:none;}.wp-block-kadence-advancedbtn.kt-btns43465_3d8502-f0 .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns43465_3d8502-f0 .kt-btn-wrap-0 .kt-button:focus{background:#444444;}<\/style>\n<div class=\"wp-block-kadence-advancedbtn kb-buttons-wrap kb-btns43465_3d8502-f0\"><style>ul.menu .wp-block-kadence-advancedbtn .kb-btn43465_dd90d6-71.kb-button{width:initial;}.wp-block-kadence-advancedbtn .kb-btn43465_dd90d6-71.kb-button{color:#0c115b;background:var(--global-palette9, #ffffff);font-size:16px;line-height:20px;font-family:'Open Sans';font-weight:600;border-top-left-radius:8px;border-top-right-radius:8px;border-bottom-right-radius:8px;border-bottom-left-radius:8px;border-top:1px solid #015e9a;border-right:1px solid #015e9a;border-bottom:1px solid #015e9a;border-left:1px solid #015e9a;padding-top:12px;padding-right:16px;padding-bottom:12px;padding-left:16px;}.kb-btn43465_dd90d6-71.kb-button .kb-svg-icon-wrap{font-size:16px;--kb-button-icon-size:16px;}.wp-block-kadence-advancedbtn .kb-btn43465_dd90d6-71.kb-button:hover, .wp-block-kadence-advancedbtn .kb-btn43465_dd90d6-71.kb-button:focus{color:#0c115b;background:var(--global-palette9, #ffffff);}@media all and (max-width: 1024px){.wp-block-kadence-advancedbtn .kb-btn43465_dd90d6-71.kb-button{border-top:1px solid #015e9a;border-right:1px solid #015e9a;border-bottom:1px solid #015e9a;border-left:1px solid #015e9a;}}@media all and (max-width: 767px){.wp-block-kadence-advancedbtn .kb-btn43465_dd90d6-71.kb-button{border-top:1px solid #015e9a;border-right:1px solid #015e9a;border-bottom:1px solid #015e9a;border-left:1px solid #015e9a;}}<\/style><a class=\"kb-button kt-button button kb-btn43465_dd90d6-71 kt-btn-size-standard kt-btn-width-type-auto kb-btn-global-outline  kt-btn-has-text-true kt-btn-has-svg-true  wp-block-kadence-singlebtn\" href=\"https:\/\/ez.restek.com\/proezlc\" target=\"_blank\" rel=\"noopener\"><span class=\"kt-btn-inner-text\">www.restek.com\/ezlc<\/span><span class=\"kb-svg-icon-wrap kb-svg-icon-fe_arrowRight kt-btn-icon-side-right\"><svg viewBox=\"0 0 24 24\"  fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"  aria-hidden=\"true\"><line x1=\"5\" y1=\"12\" x2=\"19\" y2=\"12\"\/><polyline points=\"12 5 19 12 12 19\"\/><\/svg><\/span><\/a><\/div>\n<\/div><\/div>\n\n<\/div><\/div><\/div><\/div>\n\n\n<style>.kadence-column43465_43f1fa-0f > .kt-inside-inner-col{display:flex;}.kadence-column43465_43f1fa-0f > .kt-inside-inner-col{padding-top:20px;padding-right:20px;padding-bottom:20px;padding-left:20px;}.kadence-column43465_43f1fa-0f > .kt-inside-inner-col,.kadence-column43465_43f1fa-0f > .kt-inside-inner-col:before{border-top-left-radius:16px;border-top-right-radius:16px;border-bottom-right-radius:16px;border-bottom-left-radius:16px;}.kadence-column43465_43f1fa-0f > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column43465_43f1fa-0f > .kt-inside-inner-col{flex-direction:column;justify-content:center;align-items:center;}.kadence-column43465_43f1fa-0f > .kt-inside-inner-col > .kb-image-is-ratio-size{align-self:stretch;}.kadence-column43465_43f1fa-0f > .kt-inside-inner-col > .wp-block-kadence-advancedgallery{align-self:stretch;}.kadence-column43465_43f1fa-0f > .kt-inside-inner-col > .aligncenter{width:100%;}.kt-row-column-wrap > .kadence-column43465_43f1fa-0f{align-self:center;}.kt-inner-column-height-full:not(.kt-has-1-columns) > .wp-block-kadence-column.kadence-column43465_43f1fa-0f{align-self:auto;}.kt-inner-column-height-full:not(.kt-has-1-columns) > .wp-block-kadence-column.kadence-column43465_43f1fa-0f > .kt-inside-inner-col{flex-direction:column;justify-content:center;}.kadence-column43465_43f1fa-0f > .kt-inside-inner-col{background-color:var(--global-palette2, #2B6CB0);}.kadence-column43465_43f1fa-0f > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column43465_43f1fa-0f{position:relative;}.kadence-column43465_43f1fa-0f, .kt-inside-inner-col > .kadence-column43465_43f1fa-0f:not(.specificity){margin-top:45px;margin-bottom:10px;}@media all and (max-width: 1024px){.kt-row-column-wrap > .kadence-column43465_43f1fa-0f{align-self:center;}}@media all and (max-width: 1024px){.kt-inner-column-height-full:not(.kt-has-1-columns) > .wp-block-kadence-column.kadence-column43465_43f1fa-0f{align-self:auto;}}@media all and (max-width: 1024px){.kt-inner-column-height-full:not(.kt-has-1-columns) > .wp-block-kadence-column.kadence-column43465_43f1fa-0f > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 1024px){.kadence-column43465_43f1fa-0f > .kt-inside-inner-col{flex-direction:column;justify-content:center;align-items:center;}}@media all and (max-width: 767px){.kt-row-column-wrap > .kadence-column43465_43f1fa-0f{align-self:center;}.kt-inner-column-height-full:not(.kt-has-1-columns) > .wp-block-kadence-column.kadence-column43465_43f1fa-0f{align-self:auto;}.kt-inner-column-height-full:not(.kt-has-1-columns) > .wp-block-kadence-column.kadence-column43465_43f1fa-0f > .kt-inside-inner-col{flex-direction:column;justify-content:center;}.kadence-column43465_43f1fa-0f > .kt-inside-inner-col{flex-direction:column;justify-content:center;align-items:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column43465_43f1fa-0f kvs-lg-false kvs-md-false hub-guttered-centered-container\"><div class=\"kt-inside-inner-col\"><style>.wp-block-kadence-advancedheading.kt-adv-heading43465_a89ca1-3b, .wp-block-kadence-advancedheading.kt-adv-heading43465_a89ca1-3b[data-kb-block=\"kb-adv-heading43465_a89ca1-3b\"]{text-align:center;font-size:48px;line-height:54px;font-weight:400;font-style:normal;font-family:Inter;text-transform:none;}.wp-block-kadence-advancedheading.kt-adv-heading43465_a89ca1-3b mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading43465_a89ca1-3b[data-kb-block=\"kb-adv-heading43465_a89ca1-3b\"] mark.kt-highlight{font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}.wp-block-kadence-advancedheading.kt-adv-heading43465_a89ca1-3b img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading43465_a89ca1-3b[data-kb-block=\"kb-adv-heading43465_a89ca1-3b\"] img.kb-inline-image{width:150px;vertical-align:baseline;}@media all and (max-width: 767px){.wp-block-kadence-advancedheading.kt-adv-heading43465_a89ca1-3b, .wp-block-kadence-advancedheading.kt-adv-heading43465_a89ca1-3b[data-kb-block=\"kb-adv-heading43465_a89ca1-3b\"]{font-size:36px;}}<\/style>\n<h2 class=\"kt-adv-heading43465_a89ca1-3b wp-block-kadence-advancedheading has-theme-palette-9-color has-text-color\" data-kb-block=\"kb-adv-heading43465_a89ca1-3b\">Start Saving Time Today<\/h2>\n\n\n<style>.wp-block-kadence-advancedheading.kt-adv-heading43465_eabf6d-00, .wp-block-kadence-advancedheading.kt-adv-heading43465_eabf6d-00[data-kb-block=\"kb-adv-heading43465_eabf6d-00\"]{text-align:center;font-size:20px;font-weight:400;font-style:normal;font-family:'Open Sans';color:#dee2e6;}.wp-block-kadence-advancedheading.kt-adv-heading43465_eabf6d-00 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading43465_eabf6d-00[data-kb-block=\"kb-adv-heading43465_eabf6d-00\"] mark.kt-highlight{font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}.wp-block-kadence-advancedheading.kt-adv-heading43465_eabf6d-00 img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading43465_eabf6d-00[data-kb-block=\"kb-adv-heading43465_eabf6d-00\"] img.kb-inline-image{width:150px;vertical-align:baseline;}@media all and (max-width: 767px){.wp-block-kadence-advancedheading.kt-adv-heading43465_eabf6d-00, .wp-block-kadence-advancedheading.kt-adv-heading43465_eabf6d-00[data-kb-block=\"kb-adv-heading43465_eabf6d-00\"]{font-size:16px;}}<\/style>\n<p class=\"kt-adv-heading43465_eabf6d-00 wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading43465_eabf6d-00\">Develop PFAS Methods in Minutes with our Pro&nbsp;<em>EZ<\/em>LC Chromatogram Modeler<\/p>\n\n\n<style>.wp-block-kadence-advancedbtn.kb-btns43465_724e31-c7{gap:var(--global-kb-gap-xs, 0.5rem 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