Determination of organochlorine pesticides in wild shrimps muscle tissue in Lake Taihu and Lake Dongting by Gas Chromatogrphy/Mass Spectrometry

Abstract

Twenty-nine shrimp samples from 15 sites in Lake Taihu and Lake Dongting were collected and measured, and 8 kinds of organochlorine pesticides (OCPs) in wild shrimps muscle tissue were analyzed with Gas Chromatography/Mass Spectrometry. Hexachlorobenzene(HCB), Chlordane, ∑DDTs(p,p′-DDT、o,p′-DDT、p,p′-DDE、o,p′-DDE、 p,p′-DDD、o,p′-DDD), Aldrin, Dieldrin, Endrin, Heptachlor and Mirex were quantified. The results showed HCB and p,p′-DDE were detected widely in all shrimp samples. HCB residues in shrimp muscle ranged from nd to 13.2μg/kg and p,p′-DDE ranged from 0.790 to 5.82μg/kg. Much higher concentration of OCPs was found in shrimp’s muscle of Lake Taihu than that of Lake Dongting. In addition, the levels of OCPs in shrimps muscle in dry seasons was little higher than in rainy season for two lakes.