Table 1.
Compound | Abbreviation | Chain-length | Concentration ± 2 S.D. (ng/L)c | ||
---|---|---|---|---|---|
#C a | #CF2 b | Linear | Branched Isomers d | ||
Perfluorocarboxylic Acids (PFCA) | |||||
Perfluoropropanoic acid | PFPrA | 3 | 2 | 435.0 ± 126.6 | n.d. |
Perfluorobutanoic acid | PFBA | 4 | 3 | 914.6 ± 92.7 | n.d. |
Perfluoropentanoic acid | PFPeA | 5 | 4 | 59.1 ± 8.5 | 9.3 ± 3.4 |
Perfluorohexanoic acid | PFHxA | 6 | 5 | 44.3 ± 4.6 | 8.7 ± 1.2 |
Perfluoroheptanoic acid | PFHpA | 7 | 6 | 6.0 ± 0.8 | 2.3 ± 0.3 |
Perfluorooctanoic acid | PFOA | 8 | 7 | 14.5 ± 1.9 | 6.1 ± 1.4 |
Perfluorosulfonic Acids (PFSA) | |||||
Perfluoroethane sulfonic acid | PFEtS e | 2 | 2 | 24.1 ± 13.1 | n.d. |
Perfluoropropane sulfonic acid | PFPrS | 3 | 3 | 95.4 ± 20.6 | n.d. |
Perfluorobutane sulfonic acid | PFBS | 4 | 4 | 130.4 ± 18.3 | 2.7 ± 0.6 |
Perfluoropentane sulfonic acid | PFPeS | 5 | 5 | 82.9 ± 10.7 | 11.4 ± 3.2 |
Perfluorohexane sulfonic acid | PFHxS | 6 | 6 | 48.2 ± 7.7 | 28.0 ± 3.9 |
Perfluorheptane sulfonic acid | PFHpS | 7 | 7 | 0.9 ± 0.2 | 2.1 ± 0.6 |
Perfluorooctane sulfonic acid | PFOS | 8 | 8 | 1.5 ± 0.4 | 1.3 ± 0.2 |
Perfluorosulfonamides (FASA) | |||||
Perfluorobutane sulfonamide | FBSA | 4 | 4 | 3.5 ± 1.2 | n.d. |
Perfluorohexane sulfonamide | FHxSA | 6 | 6 | 0.8 ± 0.4* | n.d. |
n.d. – not detected.
Number of carbons in compound including functional group.
Number of perfluorinated carbons in compound including CF3 tail.
Average concentration measured in pilot influent throughout duration of test (n=34, ± 2 standard deviations).
Branched isomer concentrations were estimated based on linear standards, except for PFHxS and PFOS.
PFEtS concentration was estimated based on PFPrS calibration.
Compound was not tracked for breakthrough in pilot due to low concentration.