Table 9: Recoveries of pyrethroids from soil at 10 ppb fortification levels with three solvent systems.
Average recovery (%) ± S.D. | |||
Compound | Hexane | Hexane: DCM | Hexane: Acetone |
Permethrin cis | 114.1 ± 5.4 | 113 ± 2.4 | 117.5 ± 3.5 |
Permethrin trans | 97.4 ± 1.0 | 101.9 ± 2.4 | 107.1 ± 1.6 |
Fenvalerate cis | 20.2 ± 3.2 | 99.1 ± 3.5 | 116.5 ± 3.1 |
Fenvalerate trans | 17.9 ± 0.7 | 100.3 ± 2.8 | 11.5 ± 1.8 |
Cyfluthrin | 15.7 ± 2.7 | 103.3 ± 3.1 | 117.1 ± 0.8 |
Cypermethrin | 17.8 ± 2.3 | 106.1 ± 3.5 | 114.5 ± 3.7 |
Deltamethrin | 18.78 ± 4.3 | 106.8 ± 1.0 | 119.44 ± 1.8 |
Mirex | 81.5 ± 2.8 | 90.3 ± 3.7 | 108.1 ± 7.6 |
DCM = Dichloromethane; n = 4.