The coulometric titration of acids and bases in dimethylsulfoxide media

M. Bos; S.T. IJpma; E.A.M.F. Dahmen

doi:10.1016/S0003-2670(01)84629-8

The coulometric titration of acids and bases in dimethylsulfoxide media

M. Bos, S.T. IJpma, E.A.M.F. Dahmen

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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.

Original language	Undefined
Pages (from-to)	39-47
Journal	Analytica chimica acta
Volume	83
DOIs	https://doi.org/10.1016/S0003-2670(01)84629-8
Publication status	Published - 1976

Keywords

IR-68088

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10.1016/S0003-2670(01)84629-8

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Bos, M., IJpma, S. T., & Dahmen, E. A. M. F. (1976). The coulometric titration of acids and bases in dimethylsulfoxide media. Analytica chimica acta, 83, 39-47. https://doi.org/10.1016/S0003-2670(01)84629-8

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T1 - The coulometric titration of acids and bases in dimethylsulfoxide media

AU - Bos, M.

AU - IJpma, S.T.

AU - Dahmen, E.A.M.F.

PY - 1976

Y1 - 1976

N2 - 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.

AB - 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.

KW - IR-68088

U2 - 10.1016/S0003-2670(01)84629-8

DO - 10.1016/S0003-2670(01)84629-8

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SP - 39

EP - 47

JO - Analytica chimica acta

JF - Analytica chimica acta

SN - 0003-2670

ER -