Table 17: Recovery of pyrethroids from water, sediment, moss and fish tissue at realistic fortification levels.
| Average recovery (%) ± S.D., n = 4 | ||||
| Pyrethroid & standard | Water* | Sediment | Moss | Fish tissue |
| 10 µg l-1 | 100 µg kg-1 | 100 µg kg-1 | 100 µg kg-1 | |
| Permethrin cis | 98.5 ± 3.0 | 92.7 ± 11.9 | 98.1 ± 11.6 | 114.5 ± 2.1 |
| Permethrin trans | 97.6 ± 8.0 | 98.6 ± 10.9 | 107.9 ± 11.2 | 84.5 ± 2.8 |
| Cyfluthrin | 97.3 ± 16.0 | 102.0 ± 10.1 | 87.6 ± 8.9 | 86.6 ± 6.9 |
| Cypermethrin | 106.7 ± 6.6 | 108.2 ± 2.6 | 98.5 ± 8.5 | 86.6 ± 5.7 |
| Deltamethrin | 94.0 ± 3.9 | 84.8 ± 6.3 | 84.3 ± 8.2 | 96.9 ± 4.5 |
| Fenvalerate cis | 116.2 ± 4.3 | 98.4 ± 2.4 | 94.5 ± 10.0 | 100.4 ± 3.7 |
| Fenvalerate trans | 95.5 ± 6.6 | 94.6 ± 4.6 | 80.6 ± 5.6 | 98.3 ± 6.8 |
| Mirex, standard | 99.2 ± 2.4 | 98.8 ± 4.4 | 100.6 ± 6.2 | 84.8 ± 5.1 |