The Coulometric Titration of Acids and Bases in Dimethylsulfoxide Media

Abstract

The coulometric titration of 20-200 peq of acids and bases in DMSO media is described. In the titration of bases, the electro-oxidation of hydrogen at a platinized platinum electrode is used as the source of protons. The conditions for 100 % current efficiency at this electrode are low current density to avoid passivity and regular treatment of the electrode with potassium dichromate-sulfuric acid to remove a poisoning sulfide layer. The accuracy of the titrations is better than + 1 %. Very weak acids like phenols (pKa (DMSO) = 16) can be titrated s&cessfully. Tris(hydrosymethyl)aminomethane is the weakest base titrated_

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Cite this paper

@inproceedings{Bos2000TheCT, title={The Coulometric Titration of Acids and Bases in Dimethylsulfoxide Media}, author={Marten Bos and S T Ijpma and Erik Dahmen}, year={2000} }