CONTROL OF THE POLLUTION OF ATMOSPHERIC AIR UNDER THE USE OF PESTICIDES ON THE BASIS OF TRIAZOLINTION

Abstract

Introduction. The analytical decision on control of active ingredient of pesticides of a chemical class of a triazolintione - the prothioconazole considered as the system fungicide of the new generation possessing protective, eradicating and medical action in atmospheric air is presented in the article. Material and Methods. The method is based on HPLC with the UV-detector (wavelength of detecting of 213 nm), includes a sampling of the air environment on paper filters “blue film” with a speed of aspiration of 5 l/min. The extraction of a prothioconazole from filters is carried out an acetonitrile. For the concentrating of the extract from filters, there was used the reception of SPE with the application of cartridges on the basis of C18. It is noted that concentrating cannot be executed directly without preliminary dilution of an aliquot of the extract by water in a volume ratio of 1:9. Because of features of this active ingredient, his tendency to degradation for stabilization of the received water solutions amino acid cysteine is used. Results. The linearity of the calibration characteristic is confirmed in the range of concentration of 0.05 - 0.5 µ/ml (correlation coefficient more than 0.999). The lower limit of quantitation of a prothioconazole in the air environment amounts to 0.0025 mg/m3 under the aspiration of 80 L of air that is 8 times lower than the established border level of a prothioconazole in atmospheric air (0.02 mg/m3). The total error of the measurement does not exceed 16%. The developed method was applied for the determination of prothioconazole’ exposure levels in natural conditions in samples of atmospheric air within a sanitary gap taken of processing of spraying of field cultures, preliminary processing of seeds of grain, soy, corn, and potatoes, aircraft processing of field cultures (sunflower).