Table 4.
Recovery and precision of LFIST for detecting OP spiked in egg and chicken samples.
| Spiked OP (µg/kg) | Intraassay | Interassay | ||||
|---|---|---|---|---|---|---|
| Mean ± SD (µg/kg) | Recovery (%) | CV (%) | Mean ± SD (µg/kg) | Recovery (%) | CV (%) | |
| Egg samples | ||||||
| 5 | 4.32 ± 0.20 | 86.4 ± 4.0 | 4.63 | 4.38 ± 0.27 | 87.6 ± 5.4 | 6.19 |
| 10 | 8.93 ± 0.28 | 89.3 ± 2.8 | 3.14 | 8.67 ± 0.44 | 86.7 ± 4.4 | 5.07 |
| 20 | 18.24 ± 0.69 | 91.2 ± 3.5 | 3.78 | 18.09 ± 0.87 | 90.5 ± 4.3 | 4.81 |
| Chicken samples | ||||||
| 5 | 4.23 ± 0.24 | 84.6 ± 4.8 | 5.67 | 4.14 ± 0.27 | 82.8 ± 5.4 | 6.52 |
| 10 | 8.73 ± 0.35 | 87.3 ± 3.5 | 4.01 | 8.89 ± 0.50 | 88.9 ± 5.0 | 5.62 |
| 20 | 18.11 ± 0.77 | 90.55 ± 3.9 | 4.25 | 18.17 ± 0.86 | 90.6 ± 4.3 4.73 | |
Egg samples and chicken samples spiked with OP at 5, 10, and 20 μg/kg were respectively tested using LFIST. Intraassay precision was evaluated using the same batch of strips in LFIST (n = 6). For interassay precision, three batches of strips were used in LFIST. The recoveries and CV were calculated from triplicate assays in all cases.