{"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":"2026-08-07T13:54:07","modified_gmt":"2026-08-07T13:54:07","slug":"pfas-analysis-by-astm-d7979-20-for-water-sludge-influent-effluent-and-wastewater","status":"publish","type":"post","link":"https:\/\/discover.restek.com\/fr\/articles\/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 class=\"wp-block-paragraph\">ASTM D7979-20 is used for the analysis of 21 per- and polyfluoroalkyl substances (PFAS) in water, sludge, influent, effluent, and wastewater samples, and the procedure covers filtration followed by LC-MS\/MS analysis.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">D7979-20 is not available from Restek, but it may be purchased from ASTM. The full list of target analytes and products recommended by Restek is provided below. In addition, you can register and directly <a href=\"https:\/\/explore.restek.com\/PFAS-Guides\" target=\"_blank\" rel=\"noopener\">compare analyte lists and matrices across PFAS analysis methods here<\/a> or visit <a href=\"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 class=\"wp-block-paragraph\">PFAS acronyms, compound names, and CAS numbers for these perfluorinated compounds vary across methods and guidelines, and they also depend on compound form (e.g., neutral vs. salt).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">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=\"noopener\">comprehensive guide<\/a>. Please refer to ASTM D7979-20 for method-specific nomenclature and to confirm how the test method adheres to its published terminology.<\/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\">Produits mentionn\u00e9s<\/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\">                                R\u00e9f. 9304A52                            <\/a>                        <\/div>\n                        <div class=\"cpb-col cpb-col--middle\">\n                            <div class=\"cpb-title\">Colonne 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\">Voir le produit<\/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\">                                R\u00e9f. 9634252                            <\/a>                        <\/div>\n                        <div class=\"cpb-col cpb-col--middle\">\n                            <div class=\"cpb-title\">Colonne LC Force C18, 1,8 \u03bcm 50 mm 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\">Voir le produit<\/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\">                                R\u00e9f. 27854                            <\/a>                        <\/div>\n                        <div class=\"cpb-col cpb-col--middle\">\n                            <div class=\"cpb-title\">\u201cColonne-retard\u201d PFAS HPLC, 5 \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\/27854\">Voir le produit<\/a>\n                                                    <\/div>\n                    <\/div>\n                            <\/div>\n        <\/div>\n        \n\n\n<p class=\"wp-block-paragraph\">A PFAS delay column helps reduce system-related background contributions that can interfere with measurements at lower concentrations. Reducing instrument background may be especially important for avoiding a higher reporting limit in challenging analyses.<\/p>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">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\">                                R\u00e9f. 25809                            <\/a>                        <\/div>\n                        <div class=\"cpb-col cpb-col--middle\">\n                            <div class=\"cpb-title\">Filtre\/pr\u00e9colonne UltraShield UHPLC, fritt\u00e9 0.2 \u03bcm, l\u2019unit\u00e9<\/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\">Voir le produit<\/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\">                                R\u00e9f. 25808                            <\/a>                        <\/div>\n                        <div class=\"cpb-col cpb-col--middle\">\n                            <div class=\"cpb-title\">Support de cartouche \u00e0 connexion directe EXP, livr\u00e9 avec un \u00e9crou et 2 ferrules<\/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\">Voir le produit<\/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\">                                R\u00e9f. 9304A0252                            <\/a>                        <\/div>\n                        <div class=\"cpb-col cpb-col--middle\">\n                            <div class=\"cpb-title\">Cartouche de garde Raptor C18 EXP, 2.7 \u00b5m, L 5\u00a0x DI 2.1 mm, lot de 3<\/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\">Voir le produit<\/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\n<p class=\"wp-block-paragraph\">Guard columns help improve performance by protecting the analytical column from particulates and retained matrix components.<\/p>\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\">                                R\u00e9f. 28935                            <\/a>                        <\/div>\n                        <div class=\"cpb-col cpb-col--middle\">\n                            <div class=\"cpb-title\">Filtres pour seringues\u00a025 mm, porosit\u00e9 0.22\u00a0\u00b5m, polypropyl\u00e8ne, bleu, lot de 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\/28935\">Voir le produit<\/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\n<p class=\"wp-block-paragraph\">Appropriate filtration materials are important for PFAS workflows because sample prep consumables can affect background levels. Careful <a href=\"https:\/\/discover.restek.com\/articles\/evss4368\/a-two-in-one-solution-for-pfas-spe-sample-preparation\">PFAS sample preparation<\/a>, including thoughtful consumable selection, is one of the most practical steps a laboratory can take to achieve a lower method detection limit.<\/p>\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\">                                R\u00e9f. 23243                            <\/a>                        <\/div>\n                        <div class=\"cpb-col cpb-col--middle\">\n                            <div class=\"cpb-title\">Flacon \u00e0 volume limit\u00e9 \u00e0 visser, polypropyl\u00e8ne, 9\u00a0mm, 700\u00a0\u03bcl, 12 x 32\u00a0mm, lot de 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\/23243\">Voir le produit<\/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\">                                R\u00e9f. 23246                            <\/a>                        <\/div>\n                        <div class=\"cpb-col cpb-col--middle\">\n                            <div class=\"cpb-title\">Flacon \u00e0 volume limit\u00e9 \u00e0 visser, polypropyl\u00e8ne, 9\u00a0mm, 700\u00a0\u03bcl, 12 x 32\u00a0mm, lot de 1000<\/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\">Voir le produit<\/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\">                                R\u00e9f. 23244                            <\/a>                        <\/div>\n                        <div class=\"cpb-col cpb-col--middle\">\n                            <div class=\"cpb-title\">Bouchon \u00e0 visser, poly\u00e9thyl\u00e8ne (solide), membrane de 0.254 mm, transparent, 2.0\u00a0ml, 9 mm, lot de 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\/23244\">Voir le produit<\/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\">                                R\u00e9f. 23247                            <\/a>                        <\/div>\n                        <div class=\"cpb-col cpb-col--middle\">\n                            <div class=\"cpb-title\">Bouchon \u00e0 visser, poly\u00e9thyl\u00e8ne (solide), membrane de 0.254 mm, transparent, 2.0\u00a0ml, 9 mm, lot de 1000<\/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\">Voir le produit<\/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\">                                R\u00e9f. 25846                            <\/a>                        <\/div>\n                        <div class=\"cpb-col cpb-col--middle\">\n                            <div class=\"cpb-title\">Tubes vides en polypropyl\u00e8ne pour centrifugation de 50 ml, avec bouchons, lot de 50<\/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\">Voir le produit<\/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\">                                R\u00e9f. 28290                            <\/a>                        <\/div>\n                        <div class=\"cpb-col cpb-col--middle\">\n                            <div class=\"cpb-title\">Tubes vides en polypropyl\u00e8ne pour centrifugation de 50 ml, avec bouchons, lot de 500<\/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\">Voir le produit<\/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\">                                R\u00e9f. 22775                            <\/a>                        <\/div>\n                        <div class=\"cpb-col cpb-col--middle\">\n                            <div class=\"cpb-title\">Seringues NORM-JECT en plastique, 10 ml, embout &quot;luer lock&quot;, lot de 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\">Voir le produit<\/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\">                                R\u00e9f. 22774                            <\/a>                        <\/div>\n                        <div class=\"cpb-col cpb-col--middle\">\n                            <div class=\"cpb-title\">Seringues NORM-JECT en plastique, 5 ml, embout &quot;luer lock&quot;, lot de 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\">Voir le produit<\/a>\n                                                    <\/div>\n                    <\/div>\n                            <\/div>\n        <\/div>\n        \n\n\n<p class=\"wp-block-paragraph\">Polypropylene lab supplies are commonly used in PFAS workflows to address contamination concerns and sample integrity issues in routine handling. Careful material selection is also important practice in trace-level PFAS analysis.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">* 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 class=\"wp-block-group hub-fullwidth-container has-theme-palette-9-background-color has-background\" style=\"margin-top:0px;margin-bottom:0px;padding-top:var(--wp--preset--spacing--50);padding-bottom:var(--wp--preset--spacing--50)\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\"><style>.kadence-column99903_13002f-36 > .kt-inside-inner-col{padding-top:45px;padding-right:0px;padding-bottom:45px;padding-left:0px;}.kadence-column99903_13002f-36 > .kt-inside-inner-col,.kadence-column99903_13002f-36 > .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-column99903_13002f-36 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column99903_13002f-36 > .kt-inside-inner-col{flex-direction:column;}.kadence-column99903_13002f-36 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column99903_13002f-36 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column99903_13002f-36{position:relative;}@media all and (max-width: 1024px){.kadence-column99903_13002f-36 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column99903_13002f-36 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column99903_13002f-36 hub-guttered-centered-container\"><div class=\"kt-inside-inner-col\"><style>.kb-row-layout-id99903_d4b38f-90 > .kt-row-column-wrap{align-content:start;}:where(.kb-row-layout-id99903_d4b38f-90 > .kt-row-column-wrap) > .wp-block-kadence-column{justify-content:start;}.kb-row-layout-id99903_d4b38f-90 > .kt-row-column-wrap{column-gap:var(--global-kb-gap-md, 2rem);row-gap:var(--global-kb-gap-md, 2rem);padding-top:20px;padding-right:20px;padding-bottom:20px;padding-left:20px;grid-template-columns:minmax(0, 1fr);}.kb-row-layout-id99903_d4b38f-90{border-top-left-radius:16px;border-top-right-radius:16px;border-bottom-right-radius:16px;border-bottom-left-radius:16px;overflow:clip;isolation:isolate;}.kb-row-layout-id99903_d4b38f-90 > .kt-row-layout-overlay{border-top-left-radius:16px;border-top-right-radius:16px;border-bottom-right-radius:16px;border-bottom-left-radius:16px;}.kb-row-layout-id99903_d4b38f-90 > .kt-row-layout-overlay{opacity:0.30;}@media all and (max-width: 1024px){.kb-row-layout-id99903_d4b38f-90 > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr);}}@media all and (max-width: 767px){.kb-row-layout-id99903_d4b38f-90 > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr);}}<\/style><div class=\"kb-row-layout-wrap kb-row-layout-id99903_d4b38f-90 alignnone wp-block-kadence-rowlayout\"><div class=\"kt-row-column-wrap kt-has-1-columns kt-row-layout-equal kt-tab-layout-inherit kt-mobile-layout-row kt-row-valign-top\">\n<style>.kadence-column99903_e9827f-3e > .kt-inside-inner-col,.kadence-column99903_e9827f-3e > .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-column99903_e9827f-3e > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column99903_e9827f-3e > .kt-inside-inner-col{flex-direction:column;}.kadence-column99903_e9827f-3e > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column99903_e9827f-3e > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column99903_e9827f-3e{position:relative;}@media all and (max-width: 1024px){.kadence-column99903_e9827f-3e > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column99903_e9827f-3e > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column99903_e9827f-3e\"><div class=\"kt-inside-inner-col\"><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/discover.restek.com\/wp-content\/uploads\/figure-gnlp4243-pfas-hub-contact-an-expert-leaf-graphic-1024x1024.png\" alt=\"Icon depicting customer service person.\" class=\"wp-image-95744\" style=\"width:100px\" title=\"-\" srcset=\"https:\/\/discover.restek.com\/wp-content\/uploads\/figure-gnlp4243-pfas-hub-contact-an-expert-leaf-graphic-1024x1024.png 1024w, https:\/\/discover.restek.com\/wp-content\/uploads\/figure-gnlp4243-pfas-hub-contact-an-expert-leaf-graphic-300x300.png 300w, https:\/\/discover.restek.com\/wp-content\/uploads\/figure-gnlp4243-pfas-hub-contact-an-expert-leaf-graphic-150x150.png 150w, https:\/\/discover.restek.com\/wp-content\/uploads\/figure-gnlp4243-pfas-hub-contact-an-expert-leaf-graphic-768x768.png 768w, https:\/\/discover.restek.com\/wp-content\/uploads\/figure-gnlp4243-pfas-hub-contact-an-expert-leaf-graphic.png 1200w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/div>\n\n<style>.wp-block-kadence-advancedheading.kt-adv-heading99903_c05470-6b, .wp-block-kadence-advancedheading.kt-adv-heading99903_c05470-6b[data-kb-block=\"kb-adv-heading99903_c05470-6b\"]{margin-top:20px;text-align:center;font-size:48px;line-height:55px;font-weight:400;font-style:normal;font-family:'Open Sans';}.wp-block-kadence-advancedheading.kt-adv-heading99903_c05470-6b, .wp-block-kadence-advancedheading.kt-adv-heading99903_c05470-6b[data-kb-block=\"kb-adv-heading99903_c05470-6b\"] .kb-adv-text-inner{background-image:linear-gradient(270deg,rgb(4,137,214) 0%,rgb(1,94,155) 100%);background-clip:text;-webkit-box-decoration-break:clone;box-decoration-break:clone;-webkit-background-clip:text;-webkit-text-fill-color:transparent;}.wp-block-kadence-advancedheading.kt-adv-heading99903_c05470-6b mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading99903_c05470-6b[data-kb-block=\"kb-adv-heading99903_c05470-6b\"] mark.kt-highlight{font-style:normal;-webkit-text-fill-color:initial !important;-webkit-background-clip:initial !important;background-clip:initial !important;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-heading99903_c05470-6b img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading99903_c05470-6b[data-kb-block=\"kb-adv-heading99903_c05470-6b\"] img.kb-inline-image{width:150px;vertical-align:baseline;}@media all and (max-width: 1024px){.wp-block-kadence-advancedheading.kt-adv-heading99903_c05470-6b, .wp-block-kadence-advancedheading.kt-adv-heading99903_c05470-6b[data-kb-block=\"kb-adv-heading99903_c05470-6b\"]{font-size:40px;}}@media all and (max-width: 767px){.wp-block-kadence-advancedheading.kt-adv-heading99903_c05470-6b, .wp-block-kadence-advancedheading.kt-adv-heading99903_c05470-6b[data-kb-block=\"kb-adv-heading99903_c05470-6b\"]{font-size:36px;}}<\/style><h2 class=\"kt-adv-heading99903_c05470-6b wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading99903_c05470-6b\"><span class=\"kb-adv-text-inner\">Vous avez besoin d&#8217;aide pour vos analyses de PFAS ?<\/span><\/h2>\n\n\n<p class=\"has-text-align-center has-17-font-size has-theme-palette-3-color has-text-color has-link-color wp-elements-301b72d417e5cf0bb7ede58c92ee0f20 wp-block-paragraph\" style=\"padding-right:var(--wp--preset--spacing--50);padding-left:var(--wp--preset--spacing--50);font-size:23px\">Du choix de la m\u00e9thode aux recommandations de produits, nos experts PFAS sont l\u00e0 pour vous accompagner dans vos processus complexes et vous aider \u00e0 obtenir des r\u00e9sultats pr\u00e9cis et fiables.<\/p>\n\n\n<style>.wp-block-kadence-advancedbtn.kb-btns99903_cbdd3e-ae{gap:var(--global-kb-gap-xs, 0.5rem );justify-content:center;align-items:center;}.kt-btns99903_cbdd3e-ae .kt-button{font-weight:normal;font-style:normal;}.kt-btns99903_cbdd3e-ae .kt-btn-wrap-0{margin-right:5px;}.wp-block-kadence-advancedbtn.kt-btns99903_cbdd3e-ae .kt-btn-wrap-0 .kt-button{color:#555555;border-color:#555555;}.wp-block-kadence-advancedbtn.kt-btns99903_cbdd3e-ae .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns99903_cbdd3e-ae .kt-btn-wrap-0 .kt-button:focus{color:#ffffff;border-color:#444444;}.wp-block-kadence-advancedbtn.kt-btns99903_cbdd3e-ae .kt-btn-wrap-0 .kt-button::before{display:none;}.wp-block-kadence-advancedbtn.kt-btns99903_cbdd3e-ae .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns99903_cbdd3e-ae .kt-btn-wrap-0 .kt-button:focus{background:#444444;}<\/style>\n<div class=\"wp-block-kadence-advancedbtn kb-buttons-wrap kb-btns99903_cbdd3e-ae\"><style>ul.menu .wp-block-kadence-advancedbtn .kb-btn99903_1b0338-26.kb-button{width:initial;}.wp-block-kadence-advancedbtn .kb-btn99903_1b0338-26.kb-button{color:var(--global-palette9, #ffffff);background:#61b522;font-size:var(--global-kb-font-size-md, 1.25rem);border-top-left-radius:10px;border-top-right-radius:10px;border-bottom-right-radius:10px;border-bottom-left-radius:10px;border-top:2px solid #61b522;border-right:2px solid #61b522;border-bottom:2px solid #61b522;border-left:2px solid #61b522;}.kb-btn99903_1b0338-26.kb-button .kb-svg-icon-wrap{color:var(--global-palette9, #ffffff);}.kb-btn99903_1b0338-26.kb-button:hover .kb-svg-icon-wrap, .kb-btn99903_1b0338-26.kb-button:focus .kb-svg-icon-wrap{color:#61b522;}.wp-block-kadence-advancedbtn .kb-btn99903_1b0338-26.kb-button:hover, .wp-block-kadence-advancedbtn .kb-btn99903_1b0338-26.kb-button:focus{color:#61b522;background:var(--global-palette9, #ffffff);border-top:2px solid #61b522;border-right:2px solid #61b522;border-bottom:2px solid #61b522;border-left:2px solid #61b522;}@media all and (max-width: 1024px){.wp-block-kadence-advancedbtn .kb-btn99903_1b0338-26.kb-button{border-top:2px solid #61b522;border-right:2px solid #61b522;border-bottom:2px solid #61b522;border-left:2px solid #61b522;}}@media all and (max-width: 1024px){.wp-block-kadence-advancedbtn .kb-btn99903_1b0338-26.kb-button:hover, .wp-block-kadence-advancedbtn .kb-btn99903_1b0338-26.kb-button:focus{border-top:2px solid #61b522;border-right:2px solid #61b522;border-bottom:2px solid #61b522;border-left:2px solid #61b522;}}@media all and (max-width: 767px){.wp-block-kadence-advancedbtn .kb-btn99903_1b0338-26.kb-button{border-top:2px solid #61b522;border-right:2px solid #61b522;border-bottom:2px solid #61b522;border-left:2px solid #61b522;}.wp-block-kadence-advancedbtn .kb-btn99903_1b0338-26.kb-button:hover, .wp-block-kadence-advancedbtn .kb-btn99903_1b0338-26.kb-button:focus{border-top:2px solid #61b522;border-right:2px solid #61b522;border-bottom:2px solid #61b522;border-left:2px solid #61b522;}}<\/style><a class=\"kb-button kt-button button kb-btn99903_1b0338-26 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:\/\/explore.restek.com\/PFAS\" target=\"_blank\" rel=\"noopener\"><span class=\"kt-btn-inner-text\"><strong>Contactez un expert PFAS<\/strong><\/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<\/div><\/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 style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/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 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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 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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 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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 );justify-content:center;align-items:center;}.kt-btns43465_724e31-c7 .kt-button{font-weight:normal;font-style:normal;}.kt-btns43465_724e31-c7 .kt-btn-wrap-0{margin-right:5px;}.wp-block-kadence-advancedbtn.kt-btns43465_724e31-c7 .kt-btn-wrap-0 .kt-button{color:#555555;border-color:#555555;}.wp-block-kadence-advancedbtn.kt-btns43465_724e31-c7 .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns43465_724e31-c7 .kt-btn-wrap-0 .kt-button:focus{color:#ffffff;border-color:#444444;}.wp-block-kadence-advancedbtn.kt-btns43465_724e31-c7 .kt-btn-wrap-0 .kt-button::before{display:none;}.wp-block-kadence-advancedbtn.kt-btns43465_724e31-c7 .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns43465_724e31-c7 .kt-btn-wrap-0 .kt-button:focus{background:#444444;}<\/style>\n<div class=\"wp-block-kadence-advancedbtn kb-buttons-wrap kb-btns43465_724e31-c7\"><style>ul.menu .wp-block-kadence-advancedbtn .kb-btn43465_f70ddf-d1.kb-button{width:initial;}.wp-block-kadence-advancedbtn .kb-btn43465_f70ddf-d1.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_f70ddf-d1.kb-button .kb-svg-icon-wrap{font-size:16px;--kb-button-icon-size:16px;}.wp-block-kadence-advancedbtn .kb-btn43465_f70ddf-d1.kb-button:hover, .wp-block-kadence-advancedbtn .kb-btn43465_f70ddf-d1.kb-button:focus{color:#0c115b;background:var(--global-palette9, #ffffff);}@media all and (max-width: 1024px){.wp-block-kadence-advancedbtn .kb-btn43465_f70ddf-d1.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_f70ddf-d1.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_f70ddf-d1 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\"  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