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Spectrophotometric determination of copper and iron and analysis of their mixtures by means of biacetyl 2 pyridylhydrazone thiosemicarbazone


, : Spectrophotometric determination of copper and iron and analysis of their mixtures by means of biacetyl 2 pyridylhydrazone thiosemicarbazone. Mikrochimica Acta 3(5-6): 327-342

Biacetyl (2-pyridyl)hydrazone thiosemicarbazone (BPHT) has been examined to evaluate its usefulness as a selective spectrophotometric reagent for iron and copper. Iron(II) reacts with BPHT, yielding a green complex in weakly acid medium. Copper(II) and BPHT form yellow or red complexes in acid or alkaline media, respectively. In addition, both ions can be determined simultaneously. The methods have been applied to the determination of copper and iron in ores and alloys, their mixtures in pharmaceutical preparations.

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