Abstract
The voltammetric behavior of bismuth(III) in acetate–perchlorate dimethyl sulfoxide (DMSO)- and dimethylformamide (DMF)-containing solutions is studied; the dependences of the electroreduction potentials and peak currents of bismuth(III) on the composition of a mixed mineral–organic electrolyte are revealed; it is found that the electroreduction of bismuth(III) proceeds irreversibly and involves three electrons. It is shown that, under these conditions, bismuth(III) complexes, including dimethyl sulfoxide and dimethylformamide molecules in the coordination sphere, can form, while complex particles containing three solvent molecules in the coordination sphere of the central ion predominate in the solution, and particles containing two DMSO molecules and one DMF molecule are discharged on the electrode. The regions of the linear dependence of the bismuth(III) peak current on its concentration in solution are found. Possibilities of using acetate-perchlorate dimethyl sulfoxide- and dimethylformamide-containing electrolytes for the voltammetric determination of bismuth in drugs are evaluated.
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Translated by V. Kudrinskaya
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Trubachev, A.V., Trubacheva, L.V. Voltammetric Behavior of Bismuth(III) in Dimethyl Sulfoxide- and Dimethylformamide-Containing Aqueous Organic Electrolytes. J Anal Chem 78, 1673–1678 (2023). https://doi.org/10.1134/S1061934823120183
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DOI: https://doi.org/10.1134/S1061934823120183