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Flow-Injection Potentiometric Detection of Metal Ions Based on Tungsten Oxide Electrode

Citation

Chen, ZL and Alexander, PW, Flow-Injection Potentiometric Detection of Metal Ions Based on Tungsten Oxide Electrode, Electroanalysis, 9, (2) pp. 141-144. ISSN 1040-0397 (1997) [Refereed Article]

DOI: doi:10.1002/elan.1140090210

Abstract

The use of a tungsten oxide electrode for potentiometric flow-injection analysis of transition metal ions is described. The effect of a variety of experimental conditions, including the carrier pH, the types of ligands and their concentrations, was studied. It was found that the best sensitivity for the ions tested was obtained using EDTA as a ligand. The electrode exhibited a linear response for Fe3+, Cu2+, Pb2+ and Ca2+ in the range of 2.5 × 10-4 M to 2 × 10-3 M using with 1 × 10-3 M EDTA at pH 5.0 as carrier. The detection limits were found to be between 1 × 10-5 to 5 × 10-5 M. Reproducibility for Fe3+ was about 1.7% with a stable baseline potential.

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:12330
Year Published:1997
Web of Science® Times Cited:20
Deposited By:Applied Science
Deposited On:1997-08-01
Last Modified:2011-08-15
Downloads:0

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