Voltammetric Determination of Pt(IV) using 5-Hydroxyimino-4- imino-1,3-thiazolidine-2-one P.V. Rydchuk*†, O.S. Tymoshuk†, L.V. Oleksiv†, T.I. Chaban‡, V.S. Matiychuk†
	* Corresponding authors † Ivan Franko National University of Lviv, Kyryla and Mefodiya Str. 8, Lviv, Ukraine, 79005; ‡  Danylo Halytsky Lviv National Medical University, Pekarska Str., 69, Lviv, Ukraine, 79010; *e-mail: peter_rydchuk@yahoo.com
	Methods Objects Chem. Anal., 2019, 14(3), p.130-139 https://doi.org/10.17721/moca.2019.130-139
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Abstract

5-Hydroxyimino-4-imino-1,3-thiazolidine-2-one has been suggested as a new organic reagent for the voltammetric determination of platinum. The optimal conditions of Pt(IV) voltammetric determination using 5-hydroxyimino-4- imino-1,3-thiazolidine-2-one on the peak of catalytic hydrogen currents have been determined: the background electrolyte is 0.3 M NaCl, pH of the solution is 2.0, 50-fold concentration excess of organic reagent. The sensitive method of Pt(IV) voltammetric determination was developed (LOD = 4.1·10^-9 М). The range of determinable contents covers two concentration orders. The selectivity of the developed methods have been studied towards concomitant metals ions. The accuracy of the developed method has been tested on model solutions using “added-found” method. The method has been approved during the analysis of a real sample, viz. the catalyst for oxidation of exhaust gases of the car “Chevrolet”.

Keywords: platinum, voltammetry, azolidone, 1,3-thiazole, oxime

Article language: Ukr.