DEVELOPMENT OF THE EXTRACTION METHOD OF SAMPLE PREPARATION FOR DETERMINATION OF NEONICOTINOID INSECTICIDE RESIDUES
Abstract
The distribution of neonicotinoid insecticides (acetamiprid, clothianidin, imidacloprid, thiacloprid, thiamethoxam) in different extraction systems has been studied at 20 ± 1°C. Distribution constants (P) and distribution ratios (D) of pesticides between hexane and the polar phase, rapeseed oil and the polar phase have been calculated. Based on the experimental data, the sample preparation technique has been developed for the determination of neonicotinoid residues in rapeseed, sunflower, linseed and olive oils by high performance liquid chromatography with diode array detection. The extraction method of sample preparation is simple, low reagent and time consuming, and provides chromathograms without analyte peak interference. The recoveries of pesticides from plant matrices are more than 80%. The method allows to determine neonicotinoid insecticides at concentrations below maximum residue levels established in the Republic of Belarus for vegetable oils.
About the Author
M. F. Zayats
Institute of Plant Protection
Belarus
Ph.D. (analytical chemistry), Leading Scientist of the Pesticide Dynamics Laboratory
Belarus
Ph.D. (analytical chemistry), Leading Scientist of the Pesticide Dynamics Laboratory
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