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Quantitative Determination of Cationic and Nonionic Surfactants in Aqueous Solutions of Their Mixtures by Capillary Zone Electrophoresis

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Abstract

A method based on capillary zone electrophoresis is developed for a quantitative determination of cationic (dodecylpyridinium bromide) and nonionic (Triton X-100) surfactants absorbing in the UV region. The effect of the pH and ionic strength of the solution on the output time and shape of the resultant peaks is studied, and the optimal conditions of the analysis are determined. For both surfactants, the analytical signal (the area of the peak on the electrophoregram) is found to linearly depend on the concentration. It is established that the presence of a second surface-active component does not affect the signal of the surfactant analyzed; thus, surfactants may be quantitatively determined in both individual and mixed solutions. The method of capillary zone electrophoresis is shown to be applicable for determining the CMCs of surfactants.

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Authors and Affiliations

  1. Department of Chemistry, Moscow State University, Vorob'evy gory, Moscow, 119899, Russia

    T. V. Kharitonova & N. I. Ivanova

  2. Russian Academy of Sciences, Vernadskii Institute of Geochemistry and Analytical Chemistry, ul. Kosygina 19, Moscow, 117975, Russia

    A. V. Rudnev

Authors
  1. T. V. Kharitonova
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  2. A. V. Rudnev
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  3. N. I. Ivanova
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Kharitonova, T.V., Rudnev, A.V. & Ivanova, N.I. Quantitative Determination of Cationic and Nonionic Surfactants in Aqueous Solutions of Their Mixtures by Capillary Zone Electrophoresis. Colloid Journal 65, 244–247 (2003). https://doi.org/10.1023/A:1023385612778

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  • DOI: https://doi.org/10.1023/A:1023385612778

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