Coulometric generation of H+ ions by anodic oxidation of esters of gallic acid,phenols and ascorbic acid in propylene carbonate

The application of esters of gallic acid (methyl, ethyl, propyl, butyl, octyl and dodecyl gallate), phenols (pyrocatechol and pyrogallol) and ascorbic acid for the coulometric generation of H⁺ ions in propylene carbonate, is described. The current-potential curves recorded for these depolarizers, titrated bases, indicator and the solvent used showed that the investigated depolarizers are oxidized at lower potentials than the oxidation potentials of other components in the solution H⁺ ions formed by the oxidation of these depolarizers were used for the titration of organic bases (pyridine, piperidine and quinoline) with visual and potentiometric end-point detection. The current efficiency was 100%.