Separation of aromatic sulfonate compounds by coelectroosmotic micellar electrokinetic chromatography |
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Authors: | M J Cugat F Borrull M Calull |
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Institution: | 1. Department of Química Analítica i Química Orgànica, Universitat Rovira i Virgili, P?a Imperial Tarraco 1, 43005, Tarragona, Spain
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Abstract: | Summary Coelectroosmotic micellar electrokinetic chromatography (coelectroosmotic MEKC) has been investigated for the separation of
twelve aromatic sulfonate compounds. The advantage of this method is that it combines the efficient separation characteristic
of MEKC and the short analysis time of the coelectroosmotic mode. MEKC was performed with either cetyltrimethylammonium bromide
(CTAB) or polyethylene glycol dodecyl ether (Brij 35) surfactants as pseudostationary phases and 2-propanol as organic modifier.
The electroosmotic Flow (EOF) was reversed by adding two types of EOF modifier, an alkylammonium salt (cetyltrimethylammonium
bromide, CTAB) or a cationic polyelectrolyte (hexadimetrine bromide, HDB). The surfactant concentration, applied voltage,
and temperature were optimized, the influence of 2-propanol on the MEKC resolution of the compounds was studied. The effect
of the osmotic modifier on the separation was also investigated. |
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Keywords: | Micellar electrokinetic chromatography Coelectroosmotic flow Aromatic sulfonate compounds Surfactants |
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