Determinação voltamétrica por redissolução anódica de Cu(II) em águas residuárias empregando um eletrodo de pasta de carbono modificado com quitosana

Química Nova

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   
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