Determination of Zinc and Cadmium with Characterized Electrodes of Carbon and Polyurethane Modified by a Bismuth Film

作者：Brasil Bernardelli Jossy Karla; Lapolli Flavio Rubens; Gomes da Silva Cruz Carlos Marcus; Floriano Joao Batista

来源：Materials Research, 2011, 14(3): 366-371.

DOI：10.1590/S1516-14392011005000058

• voltammetry
• modified electrode
• metals
• bismuth film

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 x 10(-5) and 3.07 x 10(-5) g.L-1 for cadmium and 1.24 x 10(-4) and 1.53 x 10(-4) g.L-1 for zinc, respectively. The presence of a bismuth film increased the sensitivity of both electrodes.

• 出版日期2011-9