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Ion chromatography on reversed-phase materials coated with mixed cationic and nonionic surfactants

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Zhu, Y and Haddad, PR and Fritz, JS (2003) Ion chromatography on reversed-phase materials coated with mixed cationic and nonionic surfactants. Journal of Chromatography A, 985 (1-2). pp. 359-365. ISSN 0021-9673

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Abstract

Columns suitable for use in anion chromatography can be prepared by coating a packed reversed-phase HPLC column (C18 silica or polystyrene particles) with a cationic surfactant. The efficiency is improved dramatically by first coating the column with a nonionic surfactant and then subsequently with the cationic surfactant. The thickness of the first coated layer as well as the chemical structure of the surfactant have a major effect on the column performance. Actual separations are included to demonstrate the convenience and practical use of the coated columns. Using this approach, columns with 12 900 theoretical plates for the 15-cm column (or 86 000 plates/m) were produced, giving well shaped peaks with an average asymmetry factor of 1.09. The coated layers were found to be stable, giving retention times with an average relative standard deviation of 1.6% for 12 consecutive runs.

Item Type: Article
Keywords: Surfactants; Nonionic surfactant; Cationic surfactant; Stationary phase, LC; Dynamically coated column
Journal or Publication Title: Journal of Chromatography A
Page Range: pp. 359-365
ISSN: 0021-9673
Identification Number - DOI: 10.1016/S0021-9673(02)01419-X
Additional Information: The definitive version is available at http://www.sciencedirect.com
Date Deposited: 20 Oct 2008 03:56
Last Modified: 18 Nov 2014 03:52
URI: http://eprints.utas.edu.au/id/eprint/7819
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