Table 2.
Analytical precision indicated by relative standard deviation of replicate extractions of a single leachate sample; accuracy indicated by %-recovery ± 95% CI; and estimated method detection limit.a
| Analyte | Precision | Accuracy | EMDL |
|---|---|---|---|
|
| |||
| RSD | % recovery ± 95%CI (SD) | ng L−1 | |
| PFBA | 7 | 25 ± 5 (7) | 4.0 |
| PFPA | 15 | 39 ± 8 (11) | 2.4 |
| PFHxA | 4 | 64 ± 9 (12) | 2.2 |
| PFHpA | 5 | 110 ± 12 (26) | 1.4 |
| PFOA | 1 | 72 ± 16 (10) | 0.8 |
| PFNA | 8 | 120 ± 18 (26) | 1.2 |
| PFDA | 5 | 73 ± 7 (10) | 0.8 |
| PFUnDA | 21 | 44 ± 3 (4) | 1.3 |
| PFDoDA | 31 | 34 ± 6 (9) | 1.3 |
| PFTrDA | ND | 28 ± 7(10) | 2.5 |
| PFTDA | ND | 8 ± 3 (5) | 4.2 |
| FOUEA | 8 | 68 ± 3 (4) | 1.0 |
| PFBS | 4 | 54 ± 2(2) | 0.7 |
| PFHxS | 9 | 80 ± 3 (5) | 1.2 |
| PFOS | 7 | 69 ± 1 (4) | 1.8 |
| PFDS | 21 | 30 ± 2 (3) | 2.1 |
| 6:2 FtS | 17 | 74 ± 2 (3) | 3.9 |
| 8:2 FtS | 16 | 94 ± 7 (10) | 2.9 |
| MeFBSA | ND | 110 ± 12 (17) | 2.2 |
| MeFBSAA | 10 | 140 ± 12 (18) | 1.0 |
| FOSA | 5 | 110 ± 8 (12) | 0.5 |
| FOSAA | ND | 110 ± 8 (12) | 1.5 |
| Me-FOSAA | 9 | 71 ± 4 (6) | 5.0 |
| Et-FOSAA | 6 | 65 ± 3 (4) | 5.4 |
a
Based on internal standard quantification