Abstract
A method is described for the separation of quaternary alkylbenzylammonium compounds as well as alkyl pyridinium salts by capillary electrophoresis using direct UV detection. The influence of the organic buffer modifier on the electrophoretic behaviour of the analytes is discussed. In addition to fused silica capillaries, also C8, C18 and neutral surface coatings are used. Separation is also performed in completely non-aqueous media. The results of method development are applied to the determination of cationic surfactants in cosmetics and pharmaceuticals. A comparison with HPLC with respect to efficiency, reproducibility and detection limits is presented.
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Received: 1 July 1996 / Revised: 6 November 1996 / Accepted: 10 November 1996
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Heinig, K., Vogt, C. & Werner, G. Determination of cationic surfactants by capillary electrophoresis. Fresenius J Anal Chem 358, 500–505 (1997). https://doi.org/10.1007/s002160050454
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DOI: https://doi.org/10.1007/s002160050454