Differential Pulse Anodic Stripping Voltammetric Study of Zinc- Ethylenediamine Complex
نویسنده
چکیده
Differential pulse anodic stripping voltammetric study of zinc-ethylenediamine complex has been investigated using thin mercury film coated glassy carbon electrode at 30°C. The overall work was carried out at constant ionic strength (I = 0.20 mol dm -3 ) and pH (9.10±0.10). The electrode processes were found to be reversible and diffusion controlled. The results revealed that zinc forms three (1:1, 1:2 and 1:3metal: ligand) complexes with ethylenediamine (en). The values of stability constant of zinc complexes were found to be 10 6.03 , 10 10.16 and 10 13.98 for ZnL, ZnL2 and ZnL3, respectively (the overall charges were omitted for simplicity). The percentage of all possible zinc species were calculated using the stability constant of zinc complexes and hydrolysis constant of zinc under present experimental conditions.
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