Abstract
The potential of high-performance capillary electrophoresis for the resolution of alkylaromatic sulphonates was investigated. The operating conditions in capillary zone electrophoresis and in micellar electrokinetic chromatography were optimized on a mixture of model molecules synthesized in the laboratory. The two methods appear to be complementary. Capillary zone electrophoresis allows not only an efficient sorting out according to the number of the sulphonic groups, but also allows, using an organic solvent (acetonitrile), a better resolution in unit time of the structural homologues of the alkylbenzene sulphonates than micellar electrokinetic chromatography. On the other hand, the latter method permits the separation of alkylbenzene sulphonate isomers.
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