Table 16: Recoveries of permethrin, cyfluthrin and mirex standard from water sediment employing different techniques liquid-liquid extraction, LLE, steam distillation extraction, SDE and ultrasonic extraction, USE.
Pyrethroid and Standard | Average recovery (%) ± S.D. | |||
LLE | SDE | USE | ||
Water | Water | Sediment | Sediment | |
10 µg l-1 | 10 µg l-1 | 100 µg kg-1 | 100 µg kg-1 | |
Permethrin | 98.5 ± 3.0(4) | 93.9 ± na(2) | 90.9 ± 14.5(4) | 92.7 ± 11.9(4) |
Cyfluthrin | 97.3 ± 16.0(4) | 72.8 ± na(2) | 63.9 ± 12.8(4) | 102.0 ± 10.0(4) |
Mirex | 99.2 ± 2.4(4) | 74.0 ± na(2) | 82.2 ± 12.5(4) | 98.8 ± 4.4(4) |
Values in parenthesis denote number of observations, na = Not available.