Development and Validation of a Multiresidue Method for the Determination of Neonicotinoid and Macrocyclic Lactone Pesticide Residues in Milk, Fruits, and Vegetables by Ultra-Performance Liquid Chromatography/MS/MS

Abstract

Abstract A multiresidue method was developed and validated for the determination of 13 neonicotinoid pesticides and metabolites, and nine macrocyclic lactone pesticides and veterinary drugs using SPE and ultra-performance liquid chromatography/MS/MS. The method was validated in milk, orange, spinach, apple, plum, watermelon, green bean, zucchini, broccoli, strawberry, grape, and tomato by analyzing replicates of residue-free control samples fortified with a mixture of 22 target analytes at three concentration levels. The recoveries of the analytes from the fortified matrixes were mostly within 70120, except for some of the neonicotinoid metabolites. The LOD values varied by analyte and matrix and ranged between 0.0012 ng/g. The developed method was successful in combining two widely different classes of compounds into a single analysis.