title: [High throuput analysis of organophosphorus pesticide residues and their metabolites in animal original foods by dual gas chromatography-dual pulse flame photometric detection].
abstract: A method was established for the quantitative determination of 54 organophosphorus pesticide residues and their metabolites in foods of animal origin by dual gas chromatography-dual pulse flame photometric detection. Homogenized samples were extracted with acetone and methylene chloride, and cleaned-up by gel permeation chromatography (GPC). The response of each analyte showed a good linearity with a correlation coefficient not less than 0. 99. The recovery experiments were performed by a blank sample spiked at low, medium and high fortification levels. The recoveries for beef, mutton, pork, chicken were in the range of 50. 5% -128. 1% with the relative standard deviations (n = 6) of 1. 1% -25. 5%, which demonstrated the good precision and accuracy of the present method. The limits of detection for the analytes were in the range of 0. 001 -0. 170 mg/kg, and the limits of quantification were in the range of 0. 002 -0. 455 mg/kg. Animal food samples collected from markets such as meat, liver and kidney were analyzed, and the residues of dichlorovos and disulfoton-sulfoxide were found in the some samples. The established method is sensitive and selective enough to detect organophosphorus pesticide residues in animal foods.
authors.affiliation: Key Laboratory of Chemical Safety and Health, National Institute of Nutrition and Food Safety, Chinese Centre for Disease Control and Prevention, Beijing 100021, China.
authors.forename: Lixin
authors.initials: L
authors.lastname: Yang
authors.forename: Heli
authors.initials: H
authors.lastname: Li
authors.forename: Hong
authors.initials: H
authors.lastname: Miao
authors.forename: Fangang
authors.initials: F
authors.lastname: Zeng
authors.forename: Ruifeng
authors.initials: R
authors.lastname: Li
authors.forename: Huijing
authors.initials: H
authors.lastname: Chen
authors.forename: Yunfeng
authors.initials: Y
authors.lastname: Zhao
authors.forename: Yongning
authors.initials: Y
authors.lastname: Wu
mesh_terms: D000818:Animals; D002417:Cattle; D002849:Chromatography, Gas / Q000379:methods*; D005410:Flame Ionization / Q000379:methods; D005506:Food Contamination / Q000032:analysis; D008460:Meat / Q000032:analysis*; D009943:Organophosphorus Compounds / Q000032:analysis* / Q000378:metabolism; D010573:Pesticide Residues / Q000032:analysis*; D010783:Photometry / Q000379:methods*; D013552:Swine
chemical_list: D009943:Organophosphorus Compounds; D010573:Pesticide Residues