Spectrophotometric determination of cobalt in hydrofining catalysts, alloys and salts with biacetylmonoxime 2-pyridylhydrazone
- 1 January 1982
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in The Analyst
- Vol. 107 (1278) , 1065-1072
- https://doi.org/10.1039/an9820701065
Abstract
Biacetylmonoxime 2-pyridylhydrazone (BMPH) has been examined to evaluate its usefulness as a selective spectrophotometric reagent for cobalt. The yellow coloration is formed at an initial pH of 5–6 in a medium containing 20% of dimethylformamide and measured at 430 nm at a final concentration of 0.5 N perchloric acid. The molar absorptivity is 3700 l mol–1 cm–1. The method has been applied to the determination of cobalt in synthetic mixtures, hydrofining catalysts, alloys and chemicals with good results. The BMPH chromogen shows a wide range of application.Keywords
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