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Evaluation of the stability constants of acidic and basic organic substances with 18-crown-6 and β-cyclodextrin using capillary zone electrophoresis

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Abstract

The possibility of evaluating stability constants in the analyte-macrocycle system by capillary zone electrophoresis was exemplified in the separation of a mixture of acids (homovanillic acid, vanilmandelic acid, 5-hydroxyindole-3-acetic acid, and 3,4-dihydroxyphenylalanine) or bases (adrenalin, noradrenalin, dopamine, serotonin, and metanephrine) with the addition of β-cyclodextrin or 18-crown-6, respectively, to the buffer electrolyte. The information content of the constants obtained in the separation of biologically important mixtures for the determination of optimum concentrations of the complex-forming agents in the running buffer is discussed.

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Authors and Affiliations

  1. Petrodvorets Branch, St. Petersburg State University, Universitetskii pr. 2, Petrodvorets, 198504, Russia

    L. A. Kartsova & A. M. Popova

  2. OOO TsKP Analiticheskaya Spektrometriya, ul. Gzhatskaya 27A, St. Petersburg, 195220, Russia

    A. A. Sidorova & O. I. Markova

Authors
  1. L. A. Kartsova
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  2. A. M. Popova
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  3. A. A. Sidorova
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  4. O. I. Markova
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Additional information

Original Russian Text © L.A. Kartsova, A.M. Popova, A.A. Sidorova, O.I. Markova, 2007, published in Zhurnal Analiticheskoi Khimii, 2007, Vol. 62, No. 2, pp. 198–203.

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Kartsova, L.A., Popova, A.M., Sidorova, A.A. et al. Evaluation of the stability constants of acidic and basic organic substances with 18-crown-6 and β-cyclodextrin using capillary zone electrophoresis. J Anal Chem 62, 179–183 (2007). https://doi.org/10.1134/S1061934807020141

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  • DOI: https://doi.org/10.1134/S1061934807020141

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