Plant and Soil Science

Approbation of method was studied, the values which characterizing the suitability of the developed and tested method measuring a pesticides residual content in tomatoes have been established. It is established that the working range of measurement of pesticide residues is from 0.01 mg/kg to 1.0 mg/kg, the error of the test results within the working range does not exceed 10%. Percentage of xenobiotics extracted from samples was established in studies of tomatoes samples artificially enriched with pesticides. The percentage of extraction is in the range of 80% to 110%, the coefficient of variation does not exceed 5%. The stability of the technique is established for 6 months in a series of in-laboratory studies of reference samples. The technique was tested in the analysis of 53 samples of tomato fruits, 5 samples of tomato paste and 10 samples of tomato juice. According to the results of chromatographic control by chromatograms of 47 tomato fruits samples, no xenobiotics were detected, one sample of tomatoes and five samples of tomato paste with trace amounts of target pesticides were detected (azoxystrobin, deltamethrin, dimethomorph, metalaxyl-M, pyraclostrobin) according to the Ukraine and the EU hygiene standards.

tomatoes, xenobiotics, pesticide residues, method approbation, chromatography