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Multiresidue Analysis of 240 Pesticides in Apple and Lettuce by QuEChERS Sample Preparation and HPLC-MS/MS Analysis
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2011
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EngineeringPesticide-residue AnalysisSample TreatmentAgricultural EconomicsPesticide ResiduesFood ChemistryEnvironmental ChemistryBiorational PesticideAnalytical ChemistryToxicologyChromatographyHplc-ms/ms AnalysisQuechers Sample PreparationPest ManagementMultiresidue AnalysisFood SafetyHplc-ms/ Ms AnalysisEnvironmental EngineeringMass SpectrometryCrop ProtectionPest ControlEnvironmental ToxicologySample Pre-treatmentMedicine
The study tested QuEChERS (quick, easy, cheap, effective, rugged and safe) sample preparation and HPLC-MS/ MS analysis for measurement of pesticide residues in fruit and vegetable. 240 kinds of pesticides spiked at three levels of 90, 45, 9 ng/g in lettuce and apple. For QuEChERS sample preparation, graphitized carbon black (GCB) was used for only lettuce in dispersive-SPE as absorbent. Matrix-matched standard calibration was used for quantitative analysis of HPLC-MS/MS. 218 pesticides (91%) in apple and 207 pesticides (86%) in lettuce showed recoveries in the range of 70~120% with . The lowest calibrated level (LCL) were 4.5 ng/g for 192 pesticides, 9 ng/g for 42 pesticides, 45 ng/g for 3 pesticides and 3 pesticides were not detected at all concentration levels. The results showed that the QuEChERS sample preparation and HPLC-MS/MS analysis can be applied to multi-residue analysis of pesticides in vegetables and fruits.