The coulometric titration of acids and bases in dimethylsulfoxide media

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Bos, M. and IJpma, S.T. and Dahmen, E.A.M.F. (1976) The coulometric titration of acids and bases in dimethylsulfoxide media. Analytica Chimica Acta, 83 . pp. 39-47. ISSN 0003-2670

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Abstract:The coulometric titration of 20–200 μeq 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 successfully. Tris(hydroxymethyl)aminomethane is the weakest base titrated.
Item Type:Article
Copyright:© 1976 Elsevier Science
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Link to this item:http://purl.utwente.nl/publications/68088
Official URL:http://dx.doi.org/10.1016/S0003-2670(01)84629-8
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