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Simultaneous determination of cobalt and nickel by first-derivative spectrophotometry

José Antonio Murillo, José M. Lemus, Arsenio Muñoz de la Peña, F. Salinas

Abstract

A method for the simultaneous determination of cobalt and nickel in mixtures by first-derivative spectrophotometry is described. The method is based on the red complexes formed by both metal ions with 1-hydroxy-2-carboxyanthraquinone in alkaline ethanol-water mixtures. The range of application is between 0.75 and 4.5 µg ml–1 for cobalt and between 0.50 and 3.0 µg ml–1 for nickel. A statistical evaluation of the experimental results is reported.

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Available abstract

Key concepts: Cobalt, Nickel, Spectrophotometry, Chemistry, Derivative (finance), Metal ions in aqueous solution, Metal, Nuclear chemistry