Table 2 The interday and intraday precision for fluorinated alternatives in matrix-matched standards and spiked matrix
Fluorinated alternatives | Standard(ng/g) | Instrument repeatability (RSD%) (n = 6) | Spiked level(ng/g) | Method repeatability (RSD%) (n = 6) | ||
|---|---|---|---|---|---|---|
Intraday | Interday | Intraday | Interday | |||
6:2 Cl-PFAES | 1 | 6.4 | 4.8 | 1 | 5.2 | 4.3 |
5 | 12 | 7.4 | 5 | 7.3 | 5.1 | |
9 | 10 | 8.5 | 9 | 6.7 | 7.4 | |
6:2 FTS | 1 | 6.1 | 6.5 | 1 | 3.5 | 7.8 |
5 | 10 | 7.1 | 5 | 7.8 | 6.9 | |
9 | 9.0 | 10 | 9 | 7.5 | 5.4 | |
OBS | 1 | 10 | 8.9 | 1 | 3.9 | 5.8 |
5 | 5.4 | 7.7 | 5 | 8.2 | 3.8 | |
9 | 9.8 | 7.0 | 9 | 5.6 | 6.4 | |
Et-PFOA | 1 | 5.3 | 6.4 | 1 | 5.4 | 7.3 |
5 | 6.6 | 5.7 | 5 | 4.2 | 4.6 | |
9 | 6.4 | 7.9 | 9 | 4.3 | 6.0 | |
