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[目的]建立了水产品中辛硫磷、倍硫磷和蝇毒磷3种有机磷农药的检测方法。[方法]样品经酸化乙腈提取,PSA吸附剂分散固相萃取净化,超高效液相色谱-串联质谱在多反应离子监测模式下检测,基质匹配外标法定量。结果加标浓度在10~100μg/kg范围内,线性相关系数(R)大于0.99。3种有机磷农药的平均回收率范围为65.8%~101.0%,RSD范围为11.4%~16.0%。本方法检出限为10μg/kg,定量限为20μg/kg。[结论]该方法可用于水产品中辛硫磷、倍硫磷和蝇毒磷等3种有机磷农药残留的同时测定。
[Objective] The research aimed to establish a method for the determination of 3 organophosphorus pesticides of phoxim, fenthion and phoxim in aquatic products. [Method] The samples were extracted with acidified acetonitrile, PSA adsorbent dispersed solid - phase extraction and purified by ultra performance liquid chromatography - tandem mass spectrometry in multiple reaction ion monitoring mode. Results The spiked concentration ranged from 10 to 100 μg / kg with a linear correlation coefficient (R) greater than 0.99. The average recoveries of three organophosphorus pesticides ranged from 65.8% to 101.0% with RSD ranging from 11.4% to 16.0%. The detection limit of this method is 10μg / kg, the limit of quantification of 20μg / kg. [Conclusion] This method could be used for simultaneous determination of three organophosphorus pesticide residues in aquatic products, including phoxim, fenthion and phoxim.