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Rapid determination of the critical micelle concentration by Taylor dispersion analysis in capillaries using both direct and indirect detection
Author(s) -
Petr Jan
Publication year - 2017
Publication title -
journal of separation science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.72
H-Index - 102
eISSN - 1615-9314
pISSN - 1615-9306
DOI - 10.1002/jssc.201601085
Subject(s) - micelle , critical micelle concentration , chemistry , capillary electrophoresis , chromatography , chromophore , pulmonary surfactant , thermodynamics of micellization , dispersion (optics) , taylor dispersion , analytical chemistry (journal) , micellar electrokinetic chromatography , detection limit , thermodynamics , organic chemistry , optics , aqueous solution , biochemistry , physics , diffusion
The critical micelle concentration is a basic characteristic of surfactants. In this article, the process of formation of micelles is studied by Taylor dispersion analysis using capillary electrophoresis instrumentation as a substituent of capillary liquid chromatography. New methods for determination of critical micelle concentration are presented. Sodium octylbenzene sulfonate and sodium dodecylsulfate are used as model compounds with and without chromophore. Two novel approaches based on indirect ultraviolet detection and indirect Taylor dispersion analysis with direct ultraviolet detection are introduced for the determination of critical micelle concentration value of surfactant without any chromophore. The determined critical micelle concentration values are in correspondence with the tabulated values at 95% confidence level.