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Characterization of a Copper Detecting Amperometric Electrode

✍ Scribed by Hans-Helmut Frey; Calum J. McNeil; Russell W. Keay; Joe V. Bannister

Book ID
101311869
Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
145 KB
Volume
10
Category
Article
ISSN
1040-0397

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✦ Synopsis

A tetraphenylporphyrin (TPP) coated glassy carbon electrode (GCE) was used for anodic stripping voltammetry (ASV) of heavy metals. It showed an increase in sensitivity for the detection of copper compared to an uncoated electrode. The influence of TPP layer thickness, pH and accumulation time on the copper detection and the interference with other cations was investigated. The detection limit of copper following a short accumulation time of 30 s was 12 ppb. Using longer accumulation times, the detection limit can be reduced to lower concentrations of the metal.

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The characteristics and applicability of a Nafion-copper modified electrode for the determination of some sugars in food samples are described. Coating with a Nafion membrane and subsequent immersion in a copper solution provides a good barrier against many electroactive hydroxyacids commonly found