Simultaneous determination of aluminium and zinc by first- and second-derivative synchronous fluorimetry

Abstract

A method for the simultaneous determination of aluminium and zinc in their mixtures by first- and second-derivative synchronous fluorimetry is described. The method is based on the fluorescent complexes formed by aluminium and zinc with 8-hydroxyquinoline-5-sulphonic acid in the presence of hexadecyltrimethylammonium bromide as a surfactant. The range of application is between 0.02 and 0.10 µg ml^–1 for aluminium and between 0.1 and 1.0 µg ml^–1 for zinc. The accuracy and precision of the method are reported.