Anodic stripping voltammetric determination of copper (II) in wastewaters using a carbon paste electrode modified with chitosan

Química Nova

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