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Determination of ascorbic acid in pharmaceutical dosage forms based on oxidation at the tubular carbon electrode.

A method for the determination of ascorbic acid in pharmaceutical dosage forms based on electrochemical oxidation at the tubular carbon electrode is presented. This method is highly specific and may be used to determine ascorbic acid in the presence of other vitamins commonly found in multivitamin products. A comparison with two commonly employed procedures of analysis shows this new method to have fewer manipulative steps and to give comparable precision and accuracy. Although automation was not used in this study, the method could readily be incorporated in automated systems because it employs the technique of continuous analysis in flowing streams.