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Ion-Chromatography performance of Poly(Aspartic) Acid Bonded Silica with various pore sizes at different ionic strengths and column temperatures

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Kebets, PA and Nesterenko, EP and Nesterenko, PN and Alpert, AJ (2004) Ion-Chromatography performance of Poly(Aspartic) Acid Bonded Silica with various pore sizes at different ionic strengths and column temperatures. Microchimica Acta, 146 (2). pp. 103-110. ISSN 0026-3672

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Abstract

A significant effect of pore size on selectivity was observed for anion exchange on polyaspartic acid-coated silica (PolyCAT A). The retention order of halogenide anions, Cl– <Br– <I–, was completely reversed between 30nm and 6nm pore materials. The zwitterionic nature of PolyCAT A made possible the simultaneous separation of anions and cations. With the column temperature, retention of cations is increased whereas retention of anions is decreased. The ionic composition of the eluent had a dramatic effect on separation efficiency with PolyCAT A of 30nm pores. The separation efficiency of ions was optimal in sulfuric acid-based eluents of reasonably high ionic strength.

Item Type: Article
Keywords: Ion chromatography; simultaneous separation of anions and cations; poly(aspartic) acid bonded silica
Journal or Publication Title: Microchimica Acta
Page Range: pp. 103-110
ISSN: 0026-3672
Identification Number - DOI: 10.1007/s00604-004-0201-y
Additional Information: The original publication is available at www.springerlink.com
Date Deposited: 01 Jul 2008 02:19
Last Modified: 18 Nov 2014 03:43
URI: http://eprints.utas.edu.au/id/eprint/6822
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