Determination of Trace Amounts of Aluminium in Water by Solid-Phase Spectrophotometry

Abstract

A method for the determination of trace amounts of aluminium based on Solid-Phase Spectrophotometry has been developed.Aluminium reacts with Eriochrome Cyanine R to give a highly coloured complex, which is fixed on a dextran type anionexchanger. The absorbance of the gel, at 590 and 750 nm, packed in a 1-mm cell, is measured directly. The calibration graph is linear in the concentration range 0.12-6.0 Fgl-' and the RSD is 1.4 %. The detection limit of the 1000-ml sample method is 20 ngl" for a 30 mg anion-exchanger. The sensitivity can be enhanced by increasing the sample volume. The method has been applied to the determination of aluminium in tap, spring and distilled water.

Metals in River Water

“…22 Morin, 23 8-hydroxyquinoline-5-sulfonic acid, 24 eriochrome cyanine R, 25 stilbazo and zephiramine, 26 and lumigallon. 27 Zhu et al reviewed absorption and fluorometric methods for the determination of aluminum.…”