Table 1.
Representative PFAS groupings and Assigned Detection Methoda
| PFAS Group | Number per Group | Analytical Methodb | Examplesc |
|---|---|---|---|
| Per- and polyfluoroalkyl carboxylates | 28 | LC-MS | PFOA, 4H-PFBA, 5:3 FTCA |
| Alkanes | 27 | GC-MS | 1 -(Perfluorohexyl)octane |
| Per- and polyfluorinated alcohols and diols | 20 | GC-MS | 8:2 FTOH; Perfluoropinacol |
| Per- and polyfluoroalkyl sulfonates | 15 | LC-MS | 6:2 FTS; PFBS; PFOS |
| Amines and amides | 14 | GC-MS | Heptafluorobutyramide; 1H,1H-perflurooheptylamine |
| Acrylates, methacrylates and diacrylates | 13 | GC-MS | 8:2 Fluorotelomer acrylate |
| Ethers, esters and ethoxylates | 12 | GC-MS | 1H,1H-Heptafluorobutyl epoxide; tris(Trifluoroethoxy)methane; Methyl 2H,2H,3H,3H-perfluoroheptanoate |
| Perfluoroalkyl ether and polyether carboxylates | 8 | LC-MS | PFPE-7; PFPE-3 |
| Perfluoroalkanoyl chlorides | 7 | LC-MS | Hexafluoroglutaryl chloride |
| Per- and polyluoroalkyl sulfonamides | 7 | LC-MS | Perfluorohexanesulfonamide |
| Alkenes | 5 | GC-MS | 6H-Perfluorohex-1-ene |
| Silanes | 5 | GC-MS | Trichloro((perfluorohexyl)ethyl) silane |
| Sulfur-containing | 4 | GC-MS | 2-(Perfluorooctyl)ethanthiol |
a
Selected groups with 4 or more PFAS are listed. See Table S1 for the complete list of PFAS analyzed.
b
Analytical method initially selected for stock evaluation work.
c
Undefined abbreviations: 4H-PFBA, 4H-perfluorobutanoic acid; 5:3 FTCA, 5:3 fluorotelomer carboxylic acid; 8:2 FTOH, 8:2 fluorotelomer alcohol; 6:2 FTS, 6:2 fluorotelomer sulfonic acid; PFBS, Perfluorobutanesulfonic acid; PFPE-7, Perfluoro(4-methoxybutanoic) acid; PFPE-3, Perfluoro-3,6-dioxaheptanoic acid.