Сatamine AB effect on the complex formation of bromopyrogallol red with scandium ions

Abstract

The regularities of complexation of bromopyrogallol red with scandium ions in the dual system and in the presence of cationic surfactant catamin AB have been studied. The optimum pH interval of complexation was determined. The light absorption spectra of the dye and its complexes with scandium ions in dual systems and in the catamin AB presence at different pH values and surfactant concentrations were recorded. The ratio between metal ion and reagent in complexes without and in the presence of catamin AB was determined by saturation and isomolar series methods at pH 5,90 and 6,40. The conditional stability constants of the obtained complexes were determined by the Babko method, calibration graphs were constructed, and molar light absorption coefficients were calculated. The influence of interfering ions was studied at pH 6,40.