Analyte | Acronym | Carbon-chain length | Molecular ion | LOD (ng/mL) |
---|---|---|---|---|
Carboxylic acids (PFCAs) | Â | Â | Â | Â |
 Perfluorobutanoic acid | PFBA | C-4 | F(CF2)3CO2− | 0.1 |
 Perfluoropentanoic acid | PFPeA | C-5 | F(CF2)4CO2− | 0.05 |
 Perfluorohexanoic acid | PFHxA | C-6 | F(CF2)5CO2− | 0.05 |
 Perfluoroheptanoic acid | PFHpA | C-7 | F(CF2)6CO2− | 0.03 |
 Perfluorooctanoic acid | PFOA | C-8 | F(CF2)7CO2− | 0.03 |
 Perfluorononanoic acid | PFNA | C-9 | F(CF2)8CO2− | 0.03 |
 Perfluorodecanoic acid | PFDA | C-10 | F(CF2)9CO2− | 0.03 |
 Perfluoroundecanoic acid | PFUnDA | C-11 | F(CF2)10CO2− | 0.03 |
 Perfluorododecanoic acid | PFDoDA | C-12 | F(CF2)11CO2− | 0.05 |
Sulfonic acids (PFSAs) | Â | Â | Â | Â |
 Perfluorobutane sulfonic acid | PFBS | C-4 | F(CF2)4SO3− | 0.1 |
 Perfluorohexane sulfonic acid | PFHxS | C-6 | F(CF2)6SO3− | 0.05 |
 Perfluoroheptane sulfonic acid | PFHpS | C-7 | F(CF2)7SO3− | 0.03 |
 Linear perfluorooctane sulfonic acid | nPFOS | C-8 | F(CF2)8SO3− | 0.03 |
 Branched perfluorooctane sulfonic acid | brPFOS | C-8 | F(CF2)8SO3− | 0.03 |
 Perfluorodecane sulfonic acid | PFDS | C-10 | F(CF2)10SO3− | 0.03 |
PFOS Precursors (PreFOS) | Â | Â | Â | Â |
 N-ethyl perfluorooctane sulfonamidoacetate | N-EtFOSAA | C-8 | F(CF2)8SO2N (C2H5)CH2CO2− | 0.03 |
 N-methyl perfluorooctane sulfonamidoacetate | N-MeFOSAA | C-8 | F(CF2)8SO2N (CH3)CH2CO2− | 0.03 |
 Linear perfluorooctane sulfonamide | nFOSA | C-8 | F(CF2)8SO2NH2 | 0.03 |
 Branched perfluorooctane sulfonamide | brFOSA | C-8 | F(CF2)8SO2NH2 | 0.03 |