Determination of ascorbic acid amount in gelatin aqueous solutions by galvanostatic coulometry using electrogenerated bromine

Abstract

The content of ascorbic acid in 0.1-3% aqueous solution of gelatin is determined by galvanostatic coulometry. The value of the concentration of ascorbic acid in the obtained solution is 2-8% lower compared with the entered values. The difference grows with the increasing concentration of gelatin. The proposed operation sequence in the sample preparation procedure allows getting reproducible results. Based on non-linear multiple regression suggested empirical approach to assessing the content of ascorbic of acids in aqueous solutions of gelatin. This is the basis for quantitative determination of ascorbic acid in jelly products from the rest of the food matrix.