Abstract
AbstractChemically modified electrodes are prepared by deposition of copper hexacyanoferrate (CuHCF) on glassy carbon. These electrodes are characterized by voltammetric and potentiometric measurements. After suitable conditioning they exhibit nearly Nernstian response to changes in activity of potassium or ammonium ions as well as good selectivity with respect to sodium ions. The kinetics of potassium ion exchange between the CuHCF film and aqueous solutions is studied and the diffusion coefficient of potassium ion in CuHCF is determined.
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