Table 6.
Validation results of the proposed analytical method for the determination of three residual herbicides in food samples.
| Analyte | Spiking Level (mg/kg) |
Recovery ± RSD a (%) | LOQ (mg/kg) |
||||
|---|---|---|---|---|---|---|---|
| Brown Rice | Soybean | Potato | Green Pepper | Mandarin | |||
| Cyhalofop-butyl | 0.01 | 87.0 ± 15.0 | 85.9 ± 14.8 | 102.9 ± 6.8 | 84.5 ± 4.5 | 92.0 ± 12.7 | 0.01 |
| 0.02 | 91.1 ± 9.8 | 95.6 ± 8.2 | 92.8 ± 10.0 | 93.4 ± 7.0 | 105.8 ± 9.3 | ||
| 0.1 | 96.9 ± 8.2 | 106.5 ± 6.0 | 89.8 ± 4.5 | 90.3 ± 7.1 | 94.4 ± 7.9 | ||
| Quizalofop-ethyl | 0.01 | 94.4 ± 7.8 | 101.3 ± 7.4 | 97.5 ± 3.8 | 89.1 ± 8.5 | 98.5 ± 6.9 | 0.01 |
| 0.02 | 97.8 ± 6.6 | 104.4 ± 3.1 | 91.2 ± 5.5 | 99.4 ± 6.7 | 104.7 ± 8.9 | ||
| 0.1 | 91.2 ± 5.2 | 106.0 ± 1.5 | 92.0 ± 1.8 | 103.8 ± 1.8 | 112.4 ± 4.0 | ||
| Pyridate | 0.01 | 106.8 ± 2.9 | 94.6 ± 5.6 | 91.0 ± 3.0 | 89.9 ± 5.4 | 93.6 ± 3.4 | 0.01 |
| 0.02 | 99.6 ± 2.0 | 90.6 ± 4.2 | 94.2 ± 5.5 | 86.8 ± 2.8 | 91.8 ± 9.2 | ||
| 0.1 | 109.6 ± 3.7 | 88.4 ± 3.1 | 94.3 ± 2.6 | 106.4 ± 0.5 | 85.7 ± 3.7 | ||
a Mean value of five measurements with relative standard deviation.