title: Levels and chiral signatures of organochlorine pesticides in urban soils of Yinchuan, China.
abstract: In this study, residual level and enantiomeric composition of typical organochlorine pesticides (OCPs) were surveyed in urban soils of Yinchuan, China. The median levels of summation Sigma HCHs and summation Sigma DDTs were 0.852 and 2.24 ng/g, respectively, which suggested little risk for ecological environment and human health in the study area. Both chiral alpha-HCH and o,p'-DDT displayed the non-racemic signatures in all samples. The isomer ratios of summation Sigma HCHs and summation Sigma DDTs combined with enantiomer fractions (EFs) of alpha-HCH and o,p'-DDT, suggested that contamination source of HCHs derived from historical HCHs (including technical HCHs and Lindane) and that of DDTs originated from old source with the usage of mixed technical DDTs and dicofol.
authors.affiliation: State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center of Eco-Environment Sciences, The Chinese Academy of Sciences, P.O. Box 2871, 18 Shuangqing Road, Haidian District, Beijing 100085, People's Republic of China.
authors.forename: Wei
authors.initials: W
authors.lastname: Wang
authors.forename: Xing-Hong
authors.initials: XH
authors.lastname: Li
authors.forename: Xiao-Fei
authors.initials: XF
authors.lastname: Wang
authors.forename: Xi-Zhi
authors.initials: XZ
authors.lastname: Wang
authors.forename: Hai
authors.initials: H
authors.lastname: Lu
authors.forename: Xiang-Ning
authors.initials: XN
authors.lastname: Jiang
authors.forename: Xiao-Bai
authors.initials: XB
authors.lastname: Xu
mesh_terms: D002681:China; D003634:DDT / Q000032:analysis* / Q000737:chemistry; D004784:Environmental Monitoring; D001556:Hexachlorocyclohexane / Q000032:analysis* / Q000737:chemistry; D007306:Insecticides / Q000032:analysis* / Q000737:chemistry; D012987:Soil / Q000032:analysis; D012989:Soil Pollutants / Q000032:analysis* / Q000737:chemistry; D013237:Stereoisomerism
chemical_list: D007306:Insecticides; D012987:Soil; D012989:Soil Pollutants; D001556:Hexachlorocyclohexane; D003634:DDT