Issue 2, 1984

Extraction-spectrophotometric determination of iron with 2-[2-(3,5-dibromopyridyl)azo]-5-dimethylaminobenzoic acid

Abstract

An extraction-spectrophotometric method for the determination of trace amounts of iron based on its extraction into chloroform with 2-[2-(3,5-dibromopyridyl)azo]-5-dimethylaminobenzoic acid from a weakly acidic medium has been developed. The maximum absorbance of the extracted species occurs at 615 nm. The reagent was very sensitive and reacted with iron(II) to form a stable, blue 1 : 2 (Fe : reagent) complex, which was extracted into chloroform. The apparent molar absorptivitiy of the iron(II) complex was 9.36 × 104 l mol–1 cm–1 at 615 nm in chloroform. The method has been applied to the determination of iron in various samples, such as aluminium alloys, silicon carbide powders and well waters.

Article information

Article type
Paper

Analyst, 1984,109, 159-162

Extraction-spectrophotometric determination of iron with 2-[2-(3,5-dibromopyridyl)azo]-5-dimethylaminobenzoic acid

T. Katami, T. Hayakawa, M. Furukawa and S. Shibata, Analyst, 1984, 109, 159 DOI: 10.1039/AN9840900159

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