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


Klampfl, CW and Haddad, PR, Behaviour 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 (2000) [Refereed Article]

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DOI: doi:10.1016/S0021-9673(99)01314-X


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 Details

Item Type:Refereed Article
Keywords:Aniline; Toluidines; Pyridine; Benzylamine; Aminopyridines;Electrochromatography; Background electrolyte composition; Mixed-mode chromatography
Research Division:Chemical Sciences
Research Group:Analytical chemistry
Research Field:Separation science
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the chemical sciences
UTAS Author:Klampfl, CW (Dr Christian Klampfl)
UTAS Author:Haddad, PR (Professor Paul Haddad)
ID Code:19327
Year Published:2000
Web of Science® Times Cited:25
Deposited By:Chemistry
Deposited On:2000-08-01
Last Modified:2010-02-20

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