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Performance of ex situ bismuth film rotating disk electrode in trace metal analysis by stripping chronopotentiometry: definition of the depletion regime and optimization of experimental parameters
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Orientador(es)
Resumo(s)
The potentiality of the ex situ deposited bismuth film electrode, allied to the rotation of a glassy carbon disk electrode
(BiFE-RDE), was exploited in trace metal analyses of lead(II) and cadmium(II) by stripping chronopotentiometry (SCP). A single BiFE (6.2 nm film thickness) can be used for a 1-day term with no significant variation in the analytical signal. The limit of detection (3s) for a deposition time of 40 s and an oxidation current of 15 10 9 A was 1.5 10 8 M for Pb(II) and 3.0 10 8 M for Cd(II). BiFE-RDE was successfully applied to the direct SCP determination of lead(II) in a fresh water certified material.
Descrição
Palavras-chave
Bismuth film electrode Fresh water Heavy metals Stripping chronopotentiometry Thin mercury film electrode
Contexto Educativo
Citação
Rocha, L. S.; Pereira, E.; Duarte, A. C.; Pinheiro, J. P.Performance of Ex Situ Bismuth Film Rotating Disk Electrode in Trace Metal Analysis by Stripping Chronopotentiometry: Definition of the Depletion Regime and Optimization of Experimental Parameters, Electroanalysis, 23, 8, 1891-19, 2011.
Editora
Wiley