Determination of traces of aluminium with chrome azurol S by solid-phase spectrophotometry.
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.
Molina-Diaz
A
A
Department of Analytical Chemistry, Faculty of Experimental Sciences, University of Granada, 23071 Jaén, Spain.
Herrador-Mariscal
J M
JM
Pascual-Reguera
M I
MI
Capitan-Vallvey
L F
LF