• Analytical Science and Technology
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• v.17 no.3
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• pp.278-281
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• 2004

The separation and concentration method of gold(III) and platium(IV) ions from other ions has been investigated using chelate resin, Amberlite IRC 718 in the mixed solution. The adsorption and desorption capacity of ions on the chelate resin in mixed solution were measured at room temperature. Using the data, gold(III) and platium(IV) ions were separated and concentrated in the ions solution.

• Journal of the Korean Chemical Society
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• v.19 no.2
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• pp.104-115
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• 1975

The electrochemical reduction of iodine in non-aqueous media have been studied by polarography, chronopotentiometry, cyclic voltammetry and controlled potential coulometry at dropping mercury electrode and platinum, gold and amalgamated platium electrodes. In amphiprotic solvents such as methanol, ethanol, isopropanol and pyridine, iodine were reduced to iodide ions via one step reduction involving 1 electron and in aprotic solvents such as acetonitrile, dimethylformamide and dimethylsulfoxide via two step reduction involving all 3 electrons. The reductions of iodine give well defined polarograms at dropping mercury electrode and irreversible chronopotentiograms at platinum electrode, but less defined irreversible chronopotentiograms at gold and amalgamated platinum electrodes, those are all diffusion controlled. The diffusion coefficients of iodine in various solvents were estimated from the chronopotentiometric data and Sand equation.