Abstract
Complexes of scandium(III) with 2,2′,3,4-tetrahydroxy-3′-sulfo-5′-nitroazobenzene were studied in the absence and presence of a third component, papaverine, dibazole, or urotropine. Optimal conditions for their formation were found, and their spectrophotometric parameters were determined. It was found that binary compounds ScR and mixed-ligand compounds formed at pH 2 exhibited absorption maxima at 477, 482, 479, and 478 nm. The stability constants of the complexes were calculated. The determination of scandium(III) with 2,2′,3,4-tetrahydroxy-3′-sulfo-5′-nitroazobenzene in the presence of papaverine, dibazole, and urotropine was found to be selective in comparison to the other known reagents. A procedure was developed for the photometric determination of scandium in hard rocks.
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Original Russian Text © S.R. Gadzhieva, T.I. Alieva, F.M. Chyragov, 2006, published in Zhurnal Analiticheskoi Khimii, 2006, Vol. 61, No. 8, pp. 803–806.
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Gadzhieva, S.R., Alieva, T.I. & Chyragov, F.M. Spectrophotometric study of scandium(III) complexation with 2,2′,3,4-tetrahydroxy-3′-sulfo-5′-nitroazobenzene in the presence of papaverine, dibazole, and urotropine. J Anal Chem 61, 740–743 (2006). https://doi.org/10.1134/S106193480608003X
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DOI: https://doi.org/10.1134/S106193480608003X