土壤中多种有机磷及氨基甲酸酯类农药残留量的气相色谱-质谱法测定

Determination of Organophosphorus and Carbamate Pesticide Residues in Soil by Gas Chromatography-Mass Spectrometry

建立了气相色谱-质谱法测定土壤中12种有机磷和氨基甲酸酯类农药残留分析方法。以丙酮-石油醚（4：1，V／V）为提取剂，采用超声波提取土壤中农药残留，经弗罗里土层析柱净化，气相色谱-质谱（选择离子模式）法同时测定了土壤中多种有机磷和氨基甲酸酯类农药。该法对0．1μg／mL和0．5μg／mL两个浓度添加水平的回收率分别为70．1％～119．0％和78．1％～119．1％，相对标准偏差分别为6．30％～9．80％和5．20％～8．23％。

A method for determination of organophosphorus and carbamate pesticide residues in soil was established by GC-MS. With acetone and petroleum ether （4：1,V/V） as extraction solvent, pesticide residues in soil were extracted ultrasonically. The extracts were then cleaned up with Florisil column prior to the subsequent analysis by GC-MS. The recoveries obtained from samples spiked with standards at the concentration levels of 0. 1μg/mL and 0.5 μg/mL were in the ranges of 70. 1%-119.0% and 78.1%-119.1% with relative standard deviations of 6. 30%-9. 80% and 5. 20%- 8. 23%, respectively. With selected ion monitoring,the qualitative and quantitative analysis were carried out by retention times and characteristic ions.