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Chromatographia

, Volume 82, Issue 4, pp 733–739 | Cite as

Comparison of Electrophoretic Methods for Determination of Critical Micelle Concentration of Anionic Alkylsulfate Surfactants in Water/Organic Environment

  • Jana Váňová
  • Martina Vavříková
  • Zuzana Smetanová
  • Petr ČeslaEmail author
Original
  • 178 Downloads
Part of the following topical collections:
  1. 24th International Symposium on Separation Sciences combined with 21st International Conference Analytical Methods and Human Health

Abstract

The methods for determination of critical micelle concentration of anionic surfactants using capillary electrophoresis instrumentation were compared in this work. We have focused on the determination of critical micelle concentration of homological series of n-alkyl sulfates using four different methods: the electrical current-based method, and method using migration times, retention factors and effective mobilities of n-alkylbenzenes as probe molecules. We have studied the effects of operation conditions (capillary dimensions, applied voltage) and composition of probe samples on the values of critical micelle concentration. The values of critical micelle concentration determined in water and in 25 mmol L−1 borate buffer pH 8.5 without and with addition of 20% (v/v) of acetonitrile ranged from 60 mmol L−1 for sodium nonyl sulfate to 6.1 mmol L−1 for sodium tridecyl sulfate, with higher values for electrolyte containing acetonitrile. The concentration and solvent of probe molecules have significant effect on the determined value of critical micelle concentration. We have studied in detail critical micelle concentration of sodium dodecyl sulfate in mixtures with low concentration of acetonitrile up to the 6% (v/v). In this region, higher uncertainty of determination of critical micelle concentration was experienced.

Keywords

Capillary electrophoresis Critical micelle concentration Sodium dodecyl sulfate Acetonitrile Micelles 

Notes

Acknowledgements

The authors acknowledge the financial support by the Czech Science Foundation, project No. 18-14893S.

Funding

This study was funded by the Czech Science Foundation (Grant number 18-14893S).

Compliance with Ethical Standards

Conflict of interest

Author Jana Váňová declares that she has no conflict of interest. Author Martina Vavříková declares that she has no conflict of interest. Author Zuzana Smetanová declares that she has no conflict of interest. Author Petr Česla declares that he has no conflict of interest.

Ethical approval

This article does not contain any studies with human participants or animals performed by any of the authors.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Analytical Chemistry, Faculty of Chemical TechnologyUniversity of PardubicePardubiceCzech Republic

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