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Complexation of lead with humic matter by stripping voltammetry. Prevention of adsorption on Nafion-coated mercury film electrode

✍ Scribed by Sofia Capelo; Ana M. Mota; Maria L. S. Gonçalves

Publisher
John Wiley and Sons
Year
1995
Tongue
English
Weight
696 KB
Volume
7
Category
Article
ISSN
1040-0397

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✦ Synopsis

The complexation of humic matter with lead in natural water conditions was studied by differential pulse anodic stripping voltammetry (DPASV) using a mercury film of a Nafion-coated mercury film as the working electrode. The results clearly show that the Nafion film greatly minimizes the adsorption of humics on the electrode. Besides adsorption, other effects on the voltammetic signal are discussed, such as the degree of lability, ligand heterogeneity, and the metal-to-ligand concentration ratio at the electrode surface.

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