Abstract
The red complex developed on interaction of iron(III) with 3-phenyl-5-isoxazolon-4-carboxylic acid ethyl ester in the pH range 2–5 can be extracted into methyl isobutyl carbinol. Based on this, a selective and rapid method for the spectrophotometric determination of traces of iron has been developed. The complex has an absorption maximum at 490 nm. Beer's law is followed up to 15.0 ppm of iron. The molar absorptivity is 4.2 × 10 3 l.mole −1. cm −1. None of the common ions interferes in the determination of iron, even though present in large excess.
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