Extractive photometric simultaneous determination of iron(II) and copper(II) with syn-phenyl-alpha-pyridyl ketoxime and analysis of ferrites.

A rapid method of simultaneous spectrophotometric determination of up to 4 ppm of iron(II) and 20 ppm of copper(II) in a mixture by chloroform extraction of the syn-phenyl-alpha-pyridyl ketoxime complexes at pH 10.0, is developed. Measurements are made at 550 and 475 nm.

Selective extraction and separation of iron(III) with 4-methylpentan-2-ol.

4-methylpentan-2-ol is used for quantitative extraction of iron(III) from 5.5-6M hydrochloric acid. The iron(III) is then stripped with water and determined titrimetrically.