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 (SO4 2-, Cl-, NO2 -, Br-, NO3 -, ClO3 -, and I-) was obtained, with detection limits for highly conducting ions (SO4 2-, 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 logk' 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 (SO4 2-, Cl-, NO3 -, NO2 -, and Br-) in snow and rainwater samples. Copyright (C) 2000 Elsevier Science B.V.

Item Type:	Refereed Article
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:	Hu, W (Mr Wei Hu)
Author:	Tanaka, K (Dr Kazuhiko Tanaka)
Author:	Haddad, PR (Professor Paul Haddad)
ID Code:	19331
Year Published:	2000
Web of Science® Times Cited:	10
Deposited By:	Chemistry
Deposited On:	2000-08-01
Last Modified:	2011-08-04
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