Table 2.
Mean concentrations (ng g−1) of pyrethroids found in Paris polyphylla sample of Kunming, and recoveries (%) obtained after spiking the samples with FP, FV, DT, and BT at three concentration levels.
| Sample | Spiked (ng g−1) | Found (ng g−1) | Recovery (%) ± SDa | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| FP | FV | DT | BT | FP | FV | DT | BT | FP | FV | DT | BT | |
| Paris polyphylla of Kunming | 0 | NDa | NDa | NDa | NDa | - | - | - | - | |||
| 20 | 18.5 | 18.1 | 17.9 | 17.1 | 92.5±4.6 | 90.5±5.1 | 89.5±3.7 | 85.5±4.8 | ||||
| 50 | 46.7 | 46.2 | 45.9 | 45.8 | 93.4±3.9 | 92.4±4.8 | 91.8±4. 5 | 91.6±5.6 | ||||
| 100 | 101.5 | 95.5 | 92.7 | 95.9 | 101.5±4.1 | 95.5±4.5 | 92.7±5.2 | 95.9±4.1 | ||||
aStandard deviation (n = 3).