Determination of Organochlorine Pesticides in Agricultural Soil by Accelerated Solvent Extraction-Gel Permeation Chromatography-Gas Chromatography-Mass Spectrometry
In this study,an accelerated solvent extraction-gel permeation chromatography-gas chromatography-mass spectrometry method was established for the determination of 23 organochlorine pesticides in agricultural soil,the optimization experiments were carried out on accelerated solvent extraction,parallel evaporation and purification methods.The method detection limits of the targets were in the range of 0.003 4～0.005 2 mg/kg.Six parallel analyses were performed on spiked soil samples with 0.25 mg/kg,and the recoveries ranged from 82.0%to 93.7%,the relative standard deviations(RSD)were less than 8.7%.The certified quality control samples were analyzed,and the results were all within the acceptance range.The method is accurate,reliable,sensitive,and has good sample purification effect,which can meet the requirements of trace analysis of organochlorine pesticide residues in soil of agricultural land.
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