Voltammetric determination of pyridoxine by use of a carbon paste electrode

Abstract

The oxidation of pyridoxine and related compounds in ammonia buffer solutions is described and a fast and simple method for the determination of pyridoxine in pharmaceutical preparations is given. The only interferences are from ascorbic acid and iron(II), both of which can be removed by ion-exchange chromatography. A comparison of the proposed method with a colorimetric method has also been made; the voltammetric method has a better relative standard deviation.