Table 4.
Precision and accuracy of the proposed method at two concentration levels a.
| Analyte | Level a | Recovery (% ± SD) b | Intra-Day Precision (% RSD) b | Inter-Day Precision (% RSD) b |
|---|---|---|---|---|
| AA | Low | 70 ± 6 | 8 | 11 |
| High | 70 ± 8 | 11 | 10 | |
| F | Low | 91 ± 10 | 11 | 13 |
| High | 83 ± 5 | 8 | 14 | |
| MF | Low | 94 ± 7 | 7 | 11 |
| High | 79 ± 6 | 8 | 11 | |
| HMF | Low | 101 ± 3 | 3 | 5 |
| High | 96 ± 3 | 5 | 8 |
a Low level: MQL level (1.3 µg/g for AA; 7.9 µg/g for F; 3.1 µg/g for MF and 1.5 µg/g for HMF); high level: 50 µg/g. b Data obtained using Ins-B-Pine-Coco as representative sample.