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Potentiometric Detection of Metal Ions Separated by Liquid Chromatography Using a Tungsten Oxide Electrode

Citation

Chen, ZL and Alexander, PW, Potentiometric Detection of Metal Ions Separated by Liquid Chromatography Using a Tungsten Oxide Electrode, Electroanalysis, 9, (11) pp. 818-821. ISSN 1040-0397 (1997) [Refereed Article]

DOI: doi:10.1002/elan.1140091103

Abstract

The use of a tungsten oxide sensor for the potentiometric detection of metal ions separated by liquid chromatography is described. Separation of metal ions such as Fe3+, Fe2+, Cu2+ and Pb2+ was performed by ion chromatography using a mobile phase containing 25 mM sodium tartrate/2 mM ethylenediamine at pH 3.8. Calibration plots were linear in the range 0.5 to 3.5 mM. Potentiometric detection was also applied to ion-interaction chromatography. The results showed that separation of metal ions was improved and the detection limits for the test metals in the range of 0.5-5 nmol were obtained in the presence of sodium citrate/1-octanesulfonic acid at pH 3.0. The potentiometric detection described in this article is shown to have advantages in terms of low cost, simplicity and sensitivity.

Item Details

Item Type:Refereed Article
Research Division:Chemical Sciences
Research Group:Analytical Chemistry
Research Field:Instrumental Methods (excl. Immunological and Bioassay Methods)
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Chemical Sciences
Author:Alexander, PW (Professor Peter Alexander)
ID Code:12336
Year Published:1997
Web of Science® Times Cited:4
Deposited By:Applied Science
Deposited On:1997-08-01
Last Modified:2011-08-15
Downloads:0

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