Micellar electrophoresis using ionic liquids.
In this study, ionic liquid based cationic surfactants were evaluated as pseudo-stationary phases in micellar electrokinetic chromatography (MEKC). The aggregation behaviour of long-chain (C(12) and C(14)) alkylimidazolium ionic liquids in water and aqueous phosphate buffer was investigated by spectrophotometry. The critical micelle concentrations of these salts were determined and compared to those of tetradecyl- and dodecyltrimethylammonium chloride, salts commonly used in capillary electrophoresis. The practical utilization of a new type of surfactant in MEKC was evaluated by introducing an ionic liquid into the running aqueous buffer to separate neutral analytes-methylresorcinol isomers and benzene derivatives.
Borissova
Maria
M
Institute of Chemistry, Faculty of Science, Tallinn University of Technology, Akadeemia tee 15, Tallinn, Estonia. mariab@chemnet.ee
Palk
Klairy
K
Koel
Mihkel
M
D001555:Benzene Derivatives / Q000302:isolation & purification; D020374:Chromatography, Micellar Electrokinetic Capillary / Q000379:methods*; D007093:Imidazoles / Q000737:chemistry; D000644:Quaternary Ammonium Compounds / Q000737:chemistry; D012118:Resorcinols / Q000302:isolation & purification; D013501:Surface-Active Agents / Q000737:chemistry*; D050337:Trimethyl Ammonium Compounds / Q000737:chemistry
D001555:Benzene Derivatives; D007093:Imidazoles; D000644:Quaternary Ammonium Compounds; D012118:Resorcinols; D013501:Surface-Active Agents; D050337:Trimethyl Ammonium Compounds; C022806:dodecyltrimethylammonium; C009410:tetradecyltrimethylammonium