Determination of thiencarbazone-methyl and cyprosulfamide residues in corn grain and corn green mass | Определение остаточных количеств тиенкарбазон-метила и ципросульфамида в зерне и зеленой массе кукурузы
2010
Zayats, M.F. | Zayats, M.A., National Academy of Sciences. Scientific and Practical Center for Arable Farming (Belarus). Institute of Plant Protection | Leshchev, S.M., Belarus State Univ., Minsk (Belarus) | Petrashkevich, N.V., National Academy of Sciences. Scientific and Practical Center for Arable Farming (Belarus). Institute of Plant Protection
Distribution of thiencarbazone-methyl and cyprosulfamide between chloroform and aqueous buffer solutions at pH=3-12 was studied at 20+/-1 deg C in the conditions of the Republic of Belarus. Based on the obtained experimental data, the extraction sample preparation method was developed for the determination of thiencarbazone-metnyl and cyprosulfamide in maize (Zea mays) grain and green mass by high performance liquid chromatography. The sample preparation method provides obtaining chromathograms without peaks, interfering with the peaks of determining substances. The proposed technique required limited number of chemical agents and takes approximately 3-4 hours. The recoveries of thiencarbazone-methyl and cyprosulfamide from plant matrices are between 72 and 88%. The method makes it possible to determine thiencarbazone-methyl and cyprosulfamide at concentrations of equal or lower the maximum residue limit for corn in European Union countries, the USA and Canada.
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