title: Multi-residue determination of organophosphorus and organochlorine pesticides in environmental samples using solid-phase extraction with cigarette filter followed by gas chromatography-mass spectrometry.
abstract: A solid-phase extraction (SPE) method was developed to extract 14 pesticides simultaneously from environment samples using cigarette filter as the sorbent before gas chromatography-mass spectrometry (GC-MS) analysis. Parameters influencing the extraction efficiency, such as the sample loading flow rate, eluent and elution volume, were optimized. The optimum sample loading rate was 3 mL/min, and the retained compounds were eluted with 6 mL of eluent at 1 mL/min under vacuum. Good linearity was obtained for all the 14 pesticides (r(2) >0.99) from 0.1 to 20 μg/L for water and from 2 to 400 μg/kg for soil samples. The detection limits (signal-to-noise=3) of the proposed method ranged from 0.01 to 0.20 μg/L for water samples and from 0.42 to 6.95 μg/kg for soil samples. The developed method was successfully applied for determination of the analytes in real environmental samples, and the mean recoveries ranged from 76.4 to 103.7% for water samples and from 79.9 to 105.3% for soil samples with the precisions (relative standard deviation) between 2.0 and 13.6%.
authors.affiliation: Key Laboratory of Food Nutrition and Safety, Ministry of Education, Tianjin Key Laboratory of Food Nutrition and Safety, Tianjin University of Science and Technology, Tianjin, PR China.
authors.forename: Guozhen
authors.initials: G
authors.lastname: Fang
authors.forename: Wen
authors.initials: W
authors.lastname: Chen
authors.forename: Yunping
authors.initials: Y
authors.lastname: Yao
authors.forename: Junping
authors.initials: J
authors.lastname: Wang
authors.forename: Junyan
authors.initials: J
authors.lastname: Qin
authors.forename: Shuo
authors.initials: S
authors.lastname: Wang
mesh_terms: D004784:Environmental Monitoring / Q000295:instrumentation / Q000379:methods*; D005374:Filtration / Q000295:instrumentation*; D008401:Gas Chromatography-Mass Spectrometry; D006843:Hydrocarbons, Chlorinated / Q000032:analysis*; D009943:Organophosphorus Compounds / Q000032:analysis*; D010573:Pesticide Residues / Q000032:analysis*; D012989:Soil Pollutants / Q000737:chemistry; D052616:Solid Phase Extraction / Q000295:instrumentation / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000737:chemistry
chemical_list: D006843:Hydrocarbons, Chlorinated; D009943:Organophosphorus Compounds; D010573:Pesticide Residues; D012989:Soil Pollutants; D014874:Water Pollutants, Chemical