Abstract
The influence of cationic surfactants, cetylpyridinium chloride (CPC), cetylpyridinium bromide (CPB), and cetyltrimethylammonium bromide (CTMAB), on the complexation of copper(II) with thenoyl-(2-oxopropyl)-N-(2-sulfo-4-nitro-5-oxyphenyl) azomethine (R) has been investigated. It has been found that monoligand compounds are formed at pH 4, while at pH 3 the formation of mixed-ligand compounds is observed. The detection limit for copper decreases and the stability constants of the complexes increase in the row Cu-R-CPC > Cu-R-CPB > Cu-R-CTMAB, with AN increase in the stability of the associates (Rh-CPC > R-CPB > R-CTMAB) in the complexation reaction. The ratio of components in monoligand (1: 1) and mixed-ligand (1: 1: 1) compounds has been determined. The limits of obedience to the Beer law have been found. A procedure has been developed for the photometric determination of copper in igneous rock and alloys.
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Original Russian Text © R.A. Alieva, N.N. Basargin, R.G. Sul’hnedzhat, F.M. Chyragov, T.I. Alieva, G.G. Gyullyarli, 2011, published in Zhurnal Analiticheskoi Khimii, 2011, Vol. 66, No. 9, pp. 987–991.
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Alieva, R.A., Basargin, N.N., Sul’hnedzhat, R.G. et al. A new procedure for determining copper in igneous rock and alloys. J Anal Chem 66, 871–875 (2011). https://doi.org/10.1134/S1061934811070033
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DOI: https://doi.org/10.1134/S1061934811070033