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Suppressed electrostatic ion chromatography with tetraborate as eluent and its application to the determination of inorganic anions in snow and rainwater

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Hu, W and Tanaka, K and Haddad, PR and Hasebe, K (2000) Suppressed electrostatic ion chromatography with tetraborate as eluent and its application to the determination of inorganic anions in snow and rainwater. Journal of Chromatography A, 884 (1-2). pp. 161-165. ISSN 0021-9673

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Abstract

Tetraborate is investigated as the eluent ion for suppressed electrostatic ion chromatography (EIC) using a zwitterionic stationary phase. Good separation of a range of inorganic anions (SO42−, Cl−, NO2−, Br−, NO3−, ClO3−, and I−) was obtained, with detection limits for highly conducting ions (SO42−, Cl−, NO2−, Br−, and NO3−) being less than 8·10−8 M, and for weakly conducting anions (ClO3− and I−) being 2.7·10−7 and 5.8·10−7 M, respectively. Calibration curves were linear up to 1.8 mM of each analyte. Retention times were found to increase with increasing eluent concentration and a linear relationship was observed between log k′ and log[Na2B4O7] for all analytes. This behaviour is attributed to the progressive formation of a binary electrical double layer at the surface of the zwitterionic stationary phase. Retention times of analytes could be manipulated by varying the concentration of the eluent. This new suppressed-EIC system was applied to the determination of inorganic anions (SO42−, Cl−, NO3−, NO2−, and Br−) in snow and rainwater samples.

Item Type: Article
Keywords: Tetraborate; Inorganic anions; Electrostatic ion chromatography; Water analysis; Stationary phases, LC; Zwitterionic surfactant stationary phase
Journal or Publication Title: Journal of Chromatography A
Page Range: pp. 161-165
ISSN: 0021-9673
Identification Number - DOI: 10.1016/S0021-9673(00)00340-X
Additional Information: The definitive version is available at http://www.sciencedirect.com
Date Deposited: 31 Oct 2008 05:38
Last Modified: 18 Nov 2014 03:52
URI: http://eprints.utas.edu.au/id/eprint/7923
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