The coulometric titration of acids and bases in dimethylsulfoxide media

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

    Research output: Contribution to journalArticleAcademic

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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 languageUndefined
    Pages (from-to)39-47
    JournalAnalytica chimica acta
    Volume83
    DOIs
    Publication statusPublished - 1976

    Keywords

    • IR-68088

    Cite this

    Bos, M. ; IJpma, S.T. ; Dahmen, E.A.M.F. / The coulometric titration of acids and bases in dimethylsulfoxide media. In: Analytica chimica acta. 1976 ; Vol. 83. pp. 39-47.
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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.",
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    year = "1976",
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    The coulometric titration of acids and bases in dimethylsulfoxide media. / Bos, M.; IJpma, S.T.; Dahmen, E.A.M.F.

    In: Analytica chimica acta, Vol. 83, 1976, p. 39-47.

    Research output: Contribution to journalArticleAcademic

    TY - JOUR

    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

    M3 - Article

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    JO - Analytica chimica acta

    JF - Analytica chimica acta

    SN - 0003-2670

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