Determination of zinc and cadmium with characterized Electrodes of carbon and polyurethane modified by a bismuth film

Materials Research

Jossy Karla Brasil Bernardelli²  Flávio Rubens Lapolli¹  Carlos Marcus Gomes Da Silva Cruz²  João Batista Floriano² 

[1] ,Federal University of Technology of Paraná Department of Chemistry & Curitiba PR ,Brazil

关键词: voltammetry;    modified electrode;    metals;    bismuth film;   

DOI  :  10.1590/S1516-14392011005000058

来源: SciELO

【 摘 要 】

This study aims to use electrodes modified with bismuth films for the determination of zinc and cadmium. The film was electrodeposited ex situ on a composite carbon electrode with polyurethane and 2% metallic bismuth (2BiE) and on a carbon bar electrode (CBE). The electrodes were characterized by scanning electron microscopy and energy dispersive spectroscopy. Through differential pulse anodic stripping voltammetry, the electrodes 2BiE and CBE containing bismuth films showed a limit of detection (LOD) of 5.56 × 10-5 and 3.07 × 10-5 g.L-1 for cadmium and 1.24 × 10-4 and 1.53 × 10-4 g.L-1 for zinc, respectively. The presence of a bismuth film increased the sensitivity of both electrodes.

【 授权许可】

CC BY   
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