title: [Residual levels of pesticides in freshwater fish from Beijing aquatic product markets and health risk assessment].
abstract: Health risks by fish consumption were assessed following the investigation of the residual levels of 25 pesticides in four kinds of freshwater fish from 4 aquatic product markets in Beijing using ultrasonic extraction-GC-MS. Eighteen pesticides were detected from the 48 samples collected. Acetochlor (97.9%) and beta-HCH (93.8%) showed high detection rates. The pesticide detected in highest concentration was chlorothalonil (1 779.4 microg x kg(-1)), followed by deltamethrin (620.3 microg x kg(-1)). Coexistence of 2-10 kinds of pesticides in fish was found with the total pesticide concentration in range of 2.7-1932 microg x kg(-1). Based on the averaged fish consumption of Beijing residents, the health risk of the studied pesticides by freshwater fish consumption was calculated as 0.043 43, suggesting a relatively low health risk.
authors.affiliation: State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. yzy@rcees.ac.cn
authors.forename: Zhi-Yong
authors.initials: ZY
authors.lastname: Yu
authors.forename: Fen
authors.initials: F
authors.lastname: Jin
authors.forename: Jing-Fang
authors.initials: JF
authors.lastname: Sun
authors.forename: Sheng-Guang
authors.initials: SG
authors.lastname: Yuan
authors.forename: Bei
authors.initials: B
authors.lastname: Zheng
authors.forename: Wen-Jing
authors.initials: WJ
authors.lastname: Zhang
authors.forename: Wei
authors.initials: W
authors.lastname: An
authors.forename: Minm
authors.initials: M
authors.lastname: Yang
mesh_terms: D000818:Animals; D002681:China; D005399:Fishes; D005506:Food Contamination / Q000032:analysis*; D005618:Fresh Water; D008401:Gas Chromatography-Mass Spectrometry; D001556:Hexachlorocyclohexane / Q000032:analysis; D010573:Pesticide Residues / Q000032:analysis*; D018570:Risk Assessment; D014052:Toluidines / Q000032:analysis; D014874:Water Pollutants, Chemical / Q000032:analysis
chemical_list: D010573:Pesticide Residues; D014052:Toluidines; D014874:Water Pollutants, Chemical; D001556:Hexachlorocyclohexane; C043377:acetochlor; C023888:beta-hexachlorocyclohexane