Determination of Carbofuran and Aldicarb Residues in Cucumber,Tomato and Cowpea by Ultra Performance Liquid Chromatography-Tandem Mass Spectrometry with Pass-through Solid Phase Extraction
  
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KeyWord:pass through solid phase extraction  ultra performance liquid chromatography-tandem mass spectrometry  cucumber  tomato  cowpea  carbofuran  aldicarb  metabolites
  
AuthorInstitution
QIN Guo-xin,LAO Shui-bing,MO Ren-fu,YAN Fei-yan,WANG Jing,JIN Mao-jun,HE Jie,ZHOU Qi-feng,YANG Yu-xia,WANG Hai-jun,CHEN Wei 1.Institute for Agricultural Product Quality Safety and Testing Technology,Guangxi Academy of Agricultural Sciences,Quality Inspection and Test Center for Sugarcane and Its Product,China Ministry of Agriculture(Nanning;2.Key Laboratory for Agro Product Quality and Safety,Ministry of Agriculture,Institute of Quality Standard and Testing Technology for Agro Products,Chinese Academy of Agricultural Sciences
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Abstract:
      An ultra performance liquid chromatography-tandem mass spectrometric(UPLC-MS/MS) method was developed for the determination of carbofuran and aldicarb,as well as their metabolites carbofuran 3-hydroxy,aldicarb sulfone and aldicarb sulfoxide in cucumber,tomato and cowpea.The samples were extracted with acetonitrile and QuEChERS salt packets containing 0.5 g sodium sesquihydrate,1 g sodium citrate,1 g NaCl and 4 g MgSO4,and purified by pass through solid phase extraction using an Oasis PRiME HLB column,then analyzed by UPLC-MS/MS.The matrix effects were observed in the analysis of the analytes in sample.The quantitations were performed by the external standard method with matrix matched calibration standards.There were linear relationships for carbofuran,carbofuran 3 hydroxy,aldicarb,aldicarb sulfone and aldicarb sulfoxide in the range of 0.001-0.5 mg/L with their correlation coefficients(r) larger than 0.996 0.Recoveries for cucumber,tomato and cowpea at spiked levels of 0.02-0.2 mg/kg ranged from 80.4% to 110%,with relative standard deviations(RSDs) of 1.1%-4.8%.The limits of detection(LOD,S/N=3) for carbofuran,carbofuran 3-hydroxy,aldicarb,aldicarb sulfone and aldicarb sulfoxide were 0.07,0.3,1.0,4.0 and 13 μg/kg,respectively,and the limits of quantitation(LOQ,S/N=10) were 0.2,1.0,2.0,13 and 42 μg/kg,respectively
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