&EPA United States "n,al™ EPA Analytical Methods for PFAS in Drinking Water EPA's new validated Method 533 focuses on "short chain" per- and polyfluoroalkyl substances (PFAS) (i.e., those with carbon chain lengths of 4 to 12). Method 533 complements EPA Method 537.1 (published November 2018) and can be used to test for 11 additional PFAS. Using both methods, a total of 29 unique PFAS can be effectively measured in drinking water. Analyte Abbreviation CASRN Method 533 Method 537.1 11 -Chloroeicosafluoro-3-oxaundecane-1 -sulfonic acid 11CI-PF30UdS 763051-92-9 X X 9-Chlorohexadecafluoro-3-oxanonane-1 -sulfonic acd 9CI-PF30NS 756426-58-1 X X 4,8-Dioxa-3H-perfluorononanoic acid ADONA 919005-14-4 X X Hexafluoropropylene oxide dimer acid HFPO-DA 13252-13-6 X X Perfluorobutanesulfonic acid PFBS 375-73-5 X X Perfluorodecanoic acid PFDA 335-76-2 X X Perfluorododecanoic acid PFDoA 307-55-1 X X Perfluoroheptanoic acid PFHpA 375-85-9 X X Perfluorohexanoic acid PFHxA 307-24-4 X X Perfluorohexanesulfonic acid PFHxS 355-46-4 X X Perfluorononanoic acid PFNA 375-95-1 X X Perfluorooctanoic acid PFOA 335-67-1 X X Perfluorooctanesulfonic acid PFOS 1763-23-1 X X Perfluoroundecanoic acid PFUnA 2058-94-8 X X 1H,1H, 2H, 2H-Perfluorohexane sulfonic acid 4:2FTS 757124-72-4 X 1H,1H, 2H, 2H-Perfluorooctane sulfonic acid 6:2FTS 27619-97-2 X 1H,1H, 2H, 2H-Perfluorodecane sulfonic acid 8:2FTS 39108-34-4 X Nonafluoro-3,6-dioxaheptanoic acid NFDHA 151772-58-6 X Perfluorobutanoic acid PFBA 375-22-4 X Perfluoro(2-ethoxyethane)sulfonic acid PFEESA 113507-82-7 X Perfluoroheptanesulfonic acid PFHpS 375-92-8 X Perfluoro-4-methoxybutanoic acid PFMBA 863090-89-5 X Perfluoro-3-methoxypropanoic acid PFMPA 377-73-1 X Perfluoropentanoic acid PFPeA 2706-90-3 X Perfluoropentanesulfonic acid PFPeS 2706-91-4 X N-ethyl perfluorooctanesulfonamidoacetic acid NEtFOSAA 2991-50-6 X N-methyl perfluorooctanesulfonamidoacetic acid NMeFOSAA 2355-31-9 X Perfluorotetradecanoic acid PFTA 376-06-7 X Perfluorotridecanoic acid PFTrDA 72629-94-8 X Office of Water (MS-140) EPA 815-B-19-021 December 2019 ------- |