Abstract
Electromigration behavior of metal ions in the presence of high concentrations of polyethylene glycol as a complexing agent was investigated under acidic non-buffered conditions. Simulation of the isotachophoretic steady state of the system containing the neutral polymer was performed. Both the complexation and the influence of viscosity on the electrophoretic mobility were taken into account. Good agreement between the calculated results and the experimentally obtained values was achieved. Based on the theoretical model, a new approach for the estimation of polymer–metal stability constants from experimental isotachophoretic data was proposed. Stability constants of Li +, Na +, Cs +, Mg 2+, Sr 2+, Mn 2+, Co 2+, Ni 2+, Zn 2+, Pb 2+, Lu 3+ and Y 3+ ions with polyethylene glycol were determined.
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