Table 7: Percentage recoveries of permethrin and cyfluthrin from spiked sediment samples.

Concentration range (µg kgl-1) Permethrin recovery (%) Cyfluthrin recovery (%)
0.005-0.5 88.4 ± 21.5 (5) 94.6 ± 7.3 (4)
0.01-0.5 91.5 ± 14.4 (9) 96.3 ± 13.0 (9)
1-5 94.7 ± 15.8 (10) 98.4 ± 12.4 (10)
10-200 82.3 ± 9.7 (10) 90.5 ± 21.4 (10)