Química Nova | |
Determinação voltamétrica por redissolução anódica de Cu(II) em águas residuárias empregando um eletrodo de pasta de carbono modificado com quitosana | |
Bruno Campos Janegitz1  Luiz Humberto Marcolino Junior1  Orlando Fatibello-filho1  | |
[1] ,Universidade Federal de São Carlos Departamento de Química São Carlos SP ,Brasil | |
关键词: chitosan; copper(II); stripping analysis; | |
DOI : 10.1590/S0100-40422007000700033 | |
来源: SciELO | |
【 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】
CC BY-NC
All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License
【 预 览 】
Files | Size | Format | View |
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RO202103040062228ZK.pdf | 202KB | download |