GC-MS法高灵敏检测蔬菜中氨基甲酸酯农药残留

Detection of pesticides residues of carbamate in vegetables by GC-MS

目的建立使用气质联用法同时检测蔬菜中多种氨基甲酸酯快速灵敏的检测方法。方法样品经乙腈提取,固相萃取柱净化,并建立一种快速测定蔬菜中6种氨基甲酸酯类农药残留(异丙威、仲丁威、残杀威、抗芽威、速灭威、甲奈威)的气相色谱质谱联用(GC-MS)检测方法。同时对22种蔬菜中的多种氨基甲酸酯类农药进行定性及定量分析。结果建立一种快速测定蔬菜中6种氨基甲酸酯类农药残留的GC-MS方法,该方法对6种氨基甲酸酯类农药的相对标准偏差为1.06%～3.73%,回收率为86.5%～112.3%,并具有较好的精密度。在应用该方法检测的22种蔬菜中,一份空心菜检测出残杀威,一份香菜中检测出异丙威。结论本文建立的快速测定蔬菜中6中氨基甲酸酯类农药的GC-MS方法准确可靠,灵敏度高,可应用于蔬菜中多种氨基甲酸酯农药的同时测定。

Objective To set up a reliable method for determination of six carbamates in vegetables by using GC-MS..Methods Samples were extracted with acetonitrile and then purified by solid-phase extraction（SPE）.A method on rapid detection of six carbamates（Isoprocarb,BPMC,Propoxur,Pirimicarb,MTMC,Carbaryl）in samples by GC-MS has been established.Qualitative and quantitative analysis of pesticide residues in 22 vegetables from local supermarket have been performed by the proposed method.Results The relative standard deviations of the method were between 1.06% and 3.73%,and the method recoveries were in the range of 86.5-112.3% with good precision.Propoxur in water spinach and Isoprocarb in caraway have positive test results in our experiments.Conclusions The method was highly sensitive with satisfied recovery and it could be applied to detect six carbamates residues in vegetables quickly and accurately.