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The levels and distribution patterns of the selected organochlorine pesticides (OCPs=p,p′-DDT, o,p′-DDT, p,p′-DDE, p,p′-DDD, α-, β-, γ- and δ-HCH) in surficial sediments from the Haihe River and Dagu Drainage River of Tianjin were investigated by means of gas chromatography coupled with micro-electronic capture detector (GC-μECD). Concentrations of OCPs in the sediments from the Haihe River ranged...
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