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Abstract


A Study on Method Validation with QuEChERS and LC-MS / MS for the detection of some Neonicotinoid Group Insecticide Residues in Tomato Samples
In this study, we aimed to validate the analysis procedure for the multiple residue analysis of imidacloprid, acetamiprid, thiamethoxam, clothianidin and thiacloprid in tomatoes. For this purpose, tomato samples were extracted using QuEChERS method and analyzed on LC-MS/MS instrument. The method was evaluated according to the limit of detection and measurement, linearity and accuracy (reproducibility, reproducibility, recovery). In the method, the linearity in the range of 5-150 µg L-1 was determined for five pesticides. The correlation coefficients range from 0.992 to 0.996. Detection limits (LOD) were between 1.03 and 1.22 µg L-1. The limits of quantification (LOQ) varies between(ranged from) 3.44 and 4.07 µg L-1. The recovery of fortified tomato samples in five different neonicotinoid groups of insecticides at two different concentrations (10 µg L-1, 50 µg L-1) was found to be above 88% in both concentrations.

Keywords
LC-MS/MS, method validation, neonicotinoid, pesticide residue, QuEChERS


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