Authors: M D H Prodhan EmmanouilN Papadakis Euphemia PapadopoulouMourkidou
Publish Date: 2016/05/20
Volume: 9, Issue: 12, Pages: 3470-3478
Abstract
An analytical method for the simultaneous determination of residues of five insecticides and two fungicides in cabbage was developed and validated Pesticide residues were extracted from the samples using QuEChERS extraction and the analysis was performed by liquid chromatography triple quadrupole mass spectrometry LCMS/MS The performance of the method was investigated in terms of accuracy precision linearity limit of detection LOD and limit of quantification LOQ The average recoveries ranged from 80 to 110 with RSDr ≤ 16 for all the analytes at four fortification levels of 001 005 010 and 020 mg/kg The LOD values ranged from 0001 to 0003 mg/kg and the LOQ for all the analytes was set at 001 mg/kg The linearity was very good and coefficient of determination was ≥ 0997 for all the analytes when matrixmatched calibration standards were used Matrix effect was estimated and it was found prominent for cabbage with cypermethrin and deltamethrin +49 and +97 respectively The method was applied very satisfactorily for the residue analysis of 132 fresh cabbage samples collected from different market places in Thessaloniki Greece Among the analyzed samples 41 31 of the total no of samples had pesticide residues of which two had multiple pesticide residues and 39 had a single pesticide residue Only one sample was found contaminated with deltamethrin at a level above the European Union maximum residue levels EUMRLs Variability of pesticide residues originated from the samples of cabbage purchased from different market places of Thessaloniki in Greece were also estimated in this study The estimated variability factors ranged from 100 to 675 and the average VFs was 500The principal author is grateful to the State Scholarship Foundation IKY Greece for their financial support to pursue his PhD The authors are thankful to Kotopoulou Athina kintzikoglou Katherina and Tsampoula Aggeliki in the Pesticide Science Laboratory of AUTH for their cooperation during the present study
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