HYGIENIC SIGNIFICANCE OF THE DETERMINATION OF PESTICIDES IN SEDIMENTATION TESTS

Abstract

Introduction. The use of pesticides creates the danger of contamination of the soil as a result of demolition outside the treatment area, which is assessed by comparing the actual pesticide content in the soil (mg/kg) with the maximum allowable / estimated allowable concentration (MAC/APC). Methods for the quantitative determination of pesticides in soil are labor-intensive; an alternative method for them may be an indirect method - determining the amount of drift to the soil using sedimentation samples (sedimentation - subsidence). The purpose of the study is a hygienic estimate of the amount of propiconazole deposited on the soil outside the cultivated area. The research objectives are to determine the content of propiconazole in the atmospheric air and on the soil outside the treatment area; to give a hygienic assessment of the amount of substance detected. Material and methods. Air samples were taken on aerosol paper filters, soil contamination was assessed using sedimentation samples by measuring the amount of substance deposited on the filters (about 40 cm2) in Petri dishes placed on the leeward side of the processing area. Results. Propiconazole was found in sedimentation samples at a level of 0.012-0.484 mg/m2 and was not identified in atmospheric air. Discussion. An algorithm is proposed for recalculating the results of measurements in filters for filters (mg/m2) for soil concentration (mg/kg), taking into account information on the mobility of the substance and the bulk density of the soil. It has been established: when using the drug in the form of an emulsion concentrate on field crops, the amount of propiconazole in demolitions on the soil can exceed the APC up to 10 times; the drug in the form of a nanoemulsion concentrate on garden crops ODC exceeded 17 times. The increased content of the substance in the soil is the reason for prohibiting the use of the drug using this technology. Conclusions. Sedimentation tests, being cumulative, confirm or refute the results of analytical control of atmospheric air, increasing the reliability of hygienic studies, further guaranteeing the safety of pesticide use for the population.