Química Nova | |
Anodic stripping voltammetric determination of copper (II) in wastewaters using a carbon paste electrode modified with chitosan | |
Janegitz, Bruno Campos1  Marcolino Junior, Luiz Humberto1  Universidade Federal de São Carlos, São Carlos, Brasil1  Fatibello-Filho, Orlando1  | |
关键词: chitosan; copper(II); stripping analysis.; | |
DOI : 10.1590/S0100-40422007000700033 | |
学科分类:化学(综合) | |
来源: Sociedade Brasileira de Quimica | |
【 摘 要 】
The electrochemical applications of a CPE modified with chitosan for the determination of Cu(II) in wastewater samples using anodic stripping voltammetry are described. The best voltammetric response was observed for a paste containing 25% m/m of chitosan. A 0.10 mol L-1 NaNO3 solution (pH 6.5) as supporting electrolyte, a pre-concentration potential of 0.20 V, pre-concentration time of 270 s and a scan rate of 25 mV s-1 were selected. The calibration graph was linear in the Cu(II) concentration range from 2.0 x 10-7 to 7.4 x 10-6 mol L-1, with a detection limit of 8.3 x 10-8 mol L-1.
【 授权许可】
Unknown
【 预 览 】
Files | Size | Format | View |
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RO201912050593950ZK.pdf | 202KB | download |