Adsorption and electrochemical reduction of Co(II)-dimethylglyoxime on mercury

被引：19

作者：

Cordon, F

Ramírez, SA

Gordillo, GJ

机构：

[1] Univ Nacl Gen Sarmiento, Inst Ciencias, RA-1613 Los Polvorines, Buenos Aires, Argentina

[2] Univ Buenos Aires, INQUIMAE DQIAQF, Fac Ciencias Exactas & Nat, RA-1428 Buenos Aires, DF, Argentina

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 2002年 / 534卷 / 02期

关键词：

cobalt; dimethylglyoxime; adsorption; capacitance; mercury electrode;

D O I：

10.1016/S0022-0728(02)01156-7

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Cobalt and nickel in aqueous solutions can be determined by adsorptive striping voltammetry, using dimethylglyoxime as a complexing agent in order to accumulate the metals efficiently on a mercury surface. In borate buffer solution (pH 9.3) capacity results suggest that Co(II)-dimethylglyoxime (Co(HDMG)(2)) adsorbs in. two different orientations each undergoing different reaction pathways: for low surface concentrations Co(0) is produced and two electrons are transferred; for high surface concentration both Co(II) and the ligand are reduced, this process involving the transfer of more than two electrons. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：131 / 141

页数：11

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