Determination of Clothianidin,Thiamethoxam and Imidacloprid In Fruit by Ultra High Performance Liquid Chromatography-Tandem Mass Spectrometry
Objective:To establish a method for the simultaneous determination of clothianidin,thiamethoxam and imidacloprid in fruits by ultra performance liquid chromatography-tandem mass spectrometry.Method:Clothianidin,thiamethoxam and imidacloprid residues in the samples were extracted by ultrasonic extraction with 0.1%formic acid acetonitrile solution,cleaned-up by QuEChERS,determined by ultra performance liquid chromatography-tandem mass spectrometry,and quantified by external standard method.Result:The method showed good linearity in the concentration range of 2～200 ng·mL-1 with the recoveries of 89.2%～97.5%,the precision of 1.0%～6.1%.Conclusion:The method has the advantages of high sensitivity,good stability and accuracy,and it can be used to determine clothianidin,thiamethoxam and imidacloprid in fruits at the same time effectively.
ultra high performance liquid chromatography-tandem mass spectrometryfruitclothianidinthiamethoxamimidacloprid
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