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Development of polyaniline microarray electrodes for cadmium analysis
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Orientador(es)
Resumo(s)
Disposable screen-printed electrodes (SPCE) were modified using a cosmetic product to partially
block the electrode surface in order to obtain a microelectrode array. The microarrays formed were
electropolymerized with aniline. Scanning electron microscopy was used to evaluate the modified
and polymerized electrode surface. Electrochemical characteristics of the constructed sensor for
cadmium analysis were evaluated by cyclic and square-wave voltammetry. Optimized stripping
procedure in which the preconcentration of cadmium was achieved by depositing at –1.20 V (vs.
Ag/AgCl) resulted in a well defined anodic peak at approximately –0.7 V at pH 4.6. The achieved
limit of detection was 4 × 10−9 mol dm−3. Spray modified and polymerized microarray electrodes
were successfully applied to quantify cadmium in fish sample digests.
Descrição
Palavras-chave
Screen-printed electrodes Microarray electrodes Aniline Cadmium
Contexto Educativo
Citação
Editora
Springer Verlag