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Behavior of basic compounds in ion-exchange capillary electrochromatography with low-pH carrier electrolytes

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Klampfl, CW and Haddad, PR (2000) Behavior of basic compounds in ion-exchange capillary electrochromatography with low-pH carrier electrolytes. Journal of Chromatography A, 884 (1-2). pp. 277-285. ISSN 0021-9673

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Abstract

This work describes the separation of basic aromatic compounds by capillary electrochromatography employing acidic carrier electrolytes and bare silica as well as strong cation-exchange stationary phases. A mixed-mode separation mechanism was involved, comprising chromatographic interactions (adsorption, ion-exchange) as well as electrophoretic migration. The influence of ion-exchange on the retention/migration of the solutes could be manipulated according to procedures commonly employed in ion chromatography. These include variations of the eluting strength and/or the concentration of the competing ion present in the background electrolyte. Using this approach, separation times could be shortened and changes in selectivity could be achieved for a number of analytes.

Item Type: Article
Keywords: Aniline; Toluidines; Pyridine; Benzylamine; Aminopyridines; Electrochromatography; Background electrolyte composition; Mixed-mode chromatography
Journal or Publication Title: Journal of Chromatography A
Page Range: pp. 277-285
ISSN: 0021-9673
Identification Number - DOI: 10.1016/S0021-9673(99)01314-X
Additional Information: The definitive version is available at http://www.sciencedirect.com
Date Deposited: 31 Oct 2008 06:05
Last Modified: 18 Nov 2014 03:52
URI: http://eprints.utas.edu.au/id/eprint/7926
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