Simultaneous determination of econazole nitrate, main impurities and preservatives in pharmaceutical formulations by micellar electrokinetic chromatography - Galdos, Angel Arturo Gaona; Zanolli Filho, Luiz Antonio; Aurora-Prado, Maria Segunda; Tavares, Marina Franco Maggi; Kedor-Hackmann, Erika Rosa Maria (Latin American Symposium on Biotechnology, Biomedical, Biopharmaceutical and Industrial Applications of Capillary Electrophoresis and Microchip Technology - LACE 2007, 2007)