Related Experiment Video
Updated: Jun 8, 2026

Merging Ion Concentration Polarization between Juxtaposed Ion Exchange Membranes to Block the Propagation of the Polarization Zone
Published on: February 23, 2017
Physical insights of salt transfer through solvent polymeric membranes by means of electrochemical methods
Angela Molina1, Joaquín A Ortuño, Carmen Serna
1Departamento de Química Física, Facultad de Química, Universidad de Murcia, 30100 Murcia, Spain. amolina@um.es
Abstract:
A combined voltammetric study of the joint transfer of the two constituting ions of a water-soluble salt has been carried out using normal-pulse voltammetry, linear-sweep voltammetry and square-wave voltammetry in a system with two liquid-liquid polarized interfaces. As a result, we have explained the voltammetric features that allow us to distinguish this uptake from that corresponding to two equally charged ions, in spite of the appearance in both situations of two current peaks with the same sign in both square-wave and linear-sweep voltammograms, and we have found that linear-sweep voltammetry and square-wave voltammetry complement each other excellently.A theoretical comparison with a system of a single polarized interface has also been made, showing that these systems are much less appropriate for characterizing these salt-ion transfers.
Related Concept Videos
Potentiometry: Membrane Electrodes
Osmosis and Osmotic Pressure of Solutions
Capillary Electrophoresis: Applications
Capillary zone electrophoresis (CZE) separates ionic components based on their electrophoretic mobility. It has been used to separate proteins, amino acids,...
Electrochemical Systems
Solvents
A...
Interfacial Electrochemical Methods: Overview

