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Effect of drying on the degradation of cationic surfactants and separation performance in capillary zone electrophoresis of inorganic anions

Citation

Harakuwe, AH and Haddad, PR and Davies, NW, Effect of drying on the degradation of cationic surfactants and separation performance in capillary zone electrophoresis of inorganic anions, Journal of Chromatography A, 863, (1) pp. 81-87. ISSN 0021-9673 (1999) [Refereed Article]


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DOI: doi:10.1016/S0021-9673(99)00952-8

Abstract

Tetradecyltrimethylammonium bromide (TTAB) is used in capillary zone electrophoresis (CZE) to control the direction and magnitude of the electroosmotic flow and the migration time of analyte anions. Drying of the hygroscopic TTAB at 100C overnight has been found to influence the final CZE separation by providing improved resolution, precision of migration times, and enhanced detection response for hydrogenphosphate. Chemical analysis of the dried TTAB using IR and GCMS indicated the presence of small amounts of an unexpected tertiary alkylamine, tetradecyldimethylamine. This amine appears to contribute to the improved separation, probably by making more effective the masking of silanophilic activity at the capillary surface and/or generating a more stable double-layer.

Item Details

Item Type:Refereed Article
Keywords:norganic anions; Surfactants; Tetradecyltrimethylammonium bromide; Tetradecyldimethylamine
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
Author:Harakuwe, AH (Mr Anthony Hekare Harakuwe)
Author:Haddad, PR (Professor Paul Haddad)
Author:Davies, NW (Associate Professor Noel Davies)
ID Code:16253
Year Published:1999
Web of Science® Times Cited:1
Deposited By:Chemistry
Deposited On:1999-08-01
Last Modified:2010-02-20
Downloads:0

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