Analytical reactions of substituted cyanoferrates: 4. Spectrophotometric determination of beryllium(II), gallium(III), and indium(III) in solution

Abstract

A new spectrophotometric method for microanalysis of Be 2+, Ga 3+, and In 3+ in solution has been developed. These ions accelerate formation of colored pentacyanoazidoferrate(III) species (absorbing at 555 nm) under alkaline conditions. Ga 3+ and In + have been quantified in the ranges 0.4–4.0 and 0.4–3.0 ppm, respectively, while for Be 2+ the range extends to 10 ppm. The reaction is nonselective, but some cations and anions can be tolerated at comparable concentrations.