Level of spiking Percent recovery of HCH isomers ± SD*
From medium From soil
  α-HCH β-HCH γ-HCH δ-HCH  α-HCH β-HCH γ-HCH δ-HCH
0.01 95.30 ± 5.68 94.57 ± 6.60 95.56 ± 7.32 96.32 ± 6.15 97.59 ± 5.74 95.72 ± 7.34 96.55 ± 6.63 96.17 ± 4.75
0.1 98.44 ± 4.41 96.92 ± 5.82 99.68 ± 4.85 98.45 ± 5.36 99.73 ± 5.38 98.20 ± 5.46 99.28 ± 5.08 98.83 ± 4.26
1 102.45 ± 4.08 101.35 ± 4.73 100.73 ± 3.77 101.93 ± 4.22 102.48 ± 4.09 100.05 ± 4.15 100.34 ± 2.32 100.76 ± 3.45
*Average of 5 replicates ± SD
Table 1: Recovery study of HCH isomers.