Affordable Access

Publisher Website

Complexation equilibria and spectrophotometric determination of iron(III) with 1-amino-4-hydroxyanthraquinone

Authors
Journal
Talanta
0039-9140
Publisher
Elsevier
Publication Date
Volume
41
Issue
10
Identifiers
DOI: 10.1016/0039-9140(94)e0098-c

Abstract

Abstract The complex equilibria of iron(III) with 1-amino-4-hydroxyanthraquinone (AMHA) were studied spectrophotometrically in 40% (v/v) ethanol and an ionic strength of 0.1 M (NaClO 4). The complexation reactions were demonstrated and characterized using graphical logarithmic analysis of the absorbance-pH graphs. A simple, rapid, selective and sensitive method for the spectrophotometric determination of trace amounts of Fe(III) is developed based on the formation of Fe(AMHA) complex at pH 2.5 (λ max = 640 nm, ϵ ⋍ 2.1 × 10 4 L. mol −1 . cm −1) in the presence of a large number of foreign ions. Interferences caused by palladium(II) was masked by the addition of cyanide ions. The method has been applied to the determination of iron in some synthetic samples and polymetallic iron ores.

There are no comments yet on this publication. Be the first to share your thoughts.