The liquid chromatography-tandem mass spectrometry (LC-MS/MS) was developed to analyze fluopicolide, fenaminstrobin and chlorantraniliprole residues in plant foods. After extracted from sample with acetonitrile and cleaned up by dispersive solid-phase extraction with PSA and C18, fluopicolide, fenaminstrobin and chlorantraniliprole was determined by LC-MS/MS. As a result, The calibration curves showed good linearity over the concentration range of 2. 0-100 μg/L with correlation eoefficients above 0. 998, and the limits of determination (LOD) was 2. 0 μg/kg. The recoveries of fluopicolide, fenaminstrobin and chlorantraniliprole residues in plant foods were in the range of 88. 2％ —107. 6％ at three spiked levels (10 μg/kg, 20 μg/kg, 40 μg/kg) ,and the relative standard deviations were 1. 2％ —8. 2％ .%采用液相色谱-串联质谱仪(LC-MS/MS) 建立了植物源性食品中氟吡菌胺、 烯肟菌胺、 氯虫苯甲酰胺残留的定量分析方法, 样品经过乙腈涡旋提取后, 无水 MgSO4、 PSA 和 C18 分散固相萃取净化, LC-MS/MS 检测.结果表明: 在 2-100 μg/L 的线性范围内,氟吡菌胺、 烯肟菌胺、 氯虫苯甲酰胺的峰面积与其浓度呈良好线性关系,方法检出限为 2 μg/kg;在水稻、 西瓜、 青菜、 番茄和黄瓜 5 种基质中,10 μg/kg、 20 μg/kg 和 40 μg/kg 三个添加水平下,氟吡菌胺、 烯肟菌胺、 氯虫苯甲酰胺回收率为 88. 2％ —107. 6％ ,相对标准偏差为 1. 2％ —8. 2％ .该方法可以满足植物源性食品中氟吡菌胺、 烯肟菌胺、 氯虫苯甲酰胺残留检测的需要.
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