Comparison of oil-in-water and water-in-oil microemulsion in microemulsion electrokinetic chromatography for the analysis of water-soluble vitamins - Roth, Gabriel; Silva, Claudinei Alves da; Tavares, Marina Franco Maggi; Altria, Kevin; Kedor-Hackmann, Erika Rosa Maria; Santoro, Maria Inês Rocha Miritello; Aurora-Prado, Maria Segunda (International Symposium, Exhibit & Workshops on Electro and Liquid Phase Separation Techniques, 2012)