A new procedure for determining copper in igneous rock and alloys |
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| Authors: | R A Alieva N N Basargin R G Sul’hnedzhat F M Chyragov T I Alieva G G Gyullyarli |
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| Institution: | 1.Department of Chemistry,Baku State University,Baku,Azerbaijan;2.Institute of Geology of Ore Deposits, Mineralogy, Petrography, Geochemistry,Russian Academy of Sciences,Moscow,Russia;3.Astara Branch,Islamic Independent University,Tara,Iran |
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| 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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