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Published on: September 1, 2017
Determination of traces of aluminium with chrome azurol S by solid-phase spectrophotometry
A Molina-Diaz1, J M Herrador-Mariscal, M I Pascual-Reguera
1Department of Analytical Chemistry, Faculty of Experimental Sciences, University of Granada, 23071 Jaén, Spain.
Abstract:
A microdetermination method at sub-mug/1. level for aluminium by solid-phase spectrophotometry has been developed. Chrome azurol S was used as chromogenic reagent to form a blue complex which was easily and strongly sorbed and concentrated on a dextran-type anion-exchange resin. The resin-phase absorbances at 615 and 800 nm were measured directly. Aluminium can be determined in the 0.6-4.0 mug/1. range with a RSD of 2.1%. The method is applied to the determination of aluminium in micaschist, natural and tap water samples.
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