Adsorption and electrochemical reduction of Co(II)-dimethylglyoxime on mercury
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(H...
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| Autores principales: | , , |
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| Formato: | JOUR |
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_00220728_v534_n2_p131_Cordon |
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| Sumario: | 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. © 2002 Elsevier Science B.V. All rights reserved. |
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