The spiked recovery of PCB congeners ranged from
62.41 ± 14.96% to 119.02 ± 7.08% for water samples, and from
69.41 ± 9.97% to 127.42 ± 15.43% for sediment samples. Each ex-
tract was analyzed in duplicate, and the relative standard devia-
tions were less than 20%. In addition, the errors involved in
sampling were assessed by carrying out triplicate sampling of
water at the same site and analysis of the sample extracts. The re-
sults showed good reproducibility for the sampling process.