ISSN:
1040-0397
Keywords:
Tungsten oxide electrode
;
Potentiometric flow-injection analysis
;
Metal ions
;
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
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.
Additional Material:
4 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/elan.1140090210
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