The application of anion-selective membrane electrodes in pharmaceutical analysis. Part II. Determination of cyanocobalamin in pharmaceutical preparations

Abstract

Quantitative reduction or illumination of cyanocobalamin are used to liberate hydrogen cyanide, which is then determined by using the cyanideselective membrane electrode. The results from this procedure are very satisfactory. The method is applicable to very low concentrations not only of pure cyanocobalamin but also of pharmaceutical preparations.