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目的:建立以选择离子-气相色谱-质谱联用(SIM-GC-MS)测定蔬菜中多种不同类型农药残留的检测方法。方法:样品用乙腈提取,经分离净化后浓缩,进行SIM-GC-MS分析。结果:该方法在一次进样过程中,可对24种农药同时进行定性和定量分析。标准曲线的线性关系良好;平均回收率在80%~120%之间;检出限在9.0×10-4~2.7×10-2μg/g之间。结论:该方法灵敏、快速、准确,适用于蔬菜中多种农药残留的快速分析。
Objective: To establish a method for the determination of various pesticide residues in vegetables by ion-gas chromatography-mass spectrometry (SIM-GC-MS). Methods: The samples were extracted with acetonitrile, purified by separation and concentrated, and analyzed by SIM-GC-MS. Results: In one injection process, this method can conduct qualitative and quantitative analysis of 24 kinds of pesticides at the same time. The calibration curve has a good linear relationship. The average recovery is between 80% and 120%. The detection limit is between 9.0 × 10-4 and 2.7 × 10-2μg / g. Conclusion: The method is sensitive, rapid and accurate and is suitable for the rapid analysis of a variety of pesticide residues in vegetables.