Indirect potentiometric titration of reducing carbohydrates. I. Using alkaline potassium mercuric bromide solution...

Indirect potentiometric titration of reducing carbohydrates was developed, where sugar is heated with excess of alkaline Hg(II)-bromide solution. The end point is detected potentiometrically using sulphide selective electrode. The effect of the alkalinity of the reagent, the heating period in a boiling water bath and the presence of the sucrose were studied. The statistical analysis of the results obtained by this method reveals that it can be used with the same accuracy as the Fehling' method.