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

被引：18
|
作者：
Janegitz, Bruno Campos [1 ]
Marcolino, Luiz Humberto, Jr. [1 ]
Fatibello-Filho, Orlando [1 ]
机构：
[1] Univ Fed Sao Carlos, Dept Quim, BR-13560 Sao Carlos, SP, Brazil
来源：
QUIMICA NOVA | 2007年 / 30卷 / 07期
关键词：
chitosan; copper(II); stripping analysis;
D O I：
10.1590/S0100-40422007000700033
中图分类号：
O6 [化学];
学科分类号：
0703 ;
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.
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页码：1673 / 1676
页数：4
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