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Analysis of inorganic anions by electrostatic ion chromatography using zwitterionic/cationic mixed micelles as the stationary phase

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Hu, W and Haddad, PR and Hasebe, K and Cook, HA and Fritz, JS (2000) Analysis of inorganic anions by electrostatic ion chromatography using zwitterionic/cationic mixed micelles as the stationary phase. Fresenius' Journal of Analytical Chemistry, 367 (7). pp. 641-644. ISSN 0937-0633

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Abstract

The inability to separate fluoride, phosphate and sulfate by electrostatic ion chromatography (EIC) was overcome by using an ODS silica column coated with mixed zwitterionic-cationic surfactants as the stationary phase. The best results were obtained using the zwitterionic surfactant, 3-(N,N-dimethylmyristylammonium)-propanesulfonate (C19H41NO3S), and the cationic surfactant, myristyltrimethylammonium, CH3(CH2)13N+(CH3)3, in a 10:1 molar ratio in the column coating solution. With a dilute solution of sodium tetraborate as the eluent the model analyte anions were completely separated in the following elution order: F-, HPO42-, SO42-, Cl-, NO2-, Br-, NO3-. The very early elution of phosphate and sulfate is most unusual and is unique to this system. Detection limits better than 1.1 2 10-4 mM and linear calibration plots up to 7.0 mM were obtained with a suppressed conductivity system.

Item Type: Article
Journal or Publication Title: Fresenius' Journal of Analytical Chemistry
Page Range: pp. 641-644
ISSN: 0937-0633
Identification Number - DOI: 10.1007/s002160000436
Additional Information: The original publication is available at www.springerlink.com
Date Deposited: 31 Oct 2008 06:01
Last Modified: 18 Nov 2014 03:52
URI: http://eprints.utas.edu.au/id/eprint/7916
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