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Updated: Jun 23, 2026

Merging Ion Concentration Polarization between Juxtaposed Ion Exchange Membranes to Block the Propagation of the Polarization Zone
Published on: February 23, 2017
Differential pulse voltammetry for ion transfer at liquid membranes with two polarized interfaces
A Molina1, C Serna, J A Ortuño
1Departamento de Química Física, Facultad de Química, Universidad de Murcia, 30100 Murcia, Spain. amolina@um.es
Abstract:
A simple analytical expression for the response of the double-pulse technique differential pulse voltammetry (DPV) corresponding to ion transfer processes in systems with two liquid/liquid polarizable interfaces has been deduced. This expression predicts lower and wider curves than those obtained with a membrane system with a single polarizable interface. Moreover, the peak potential of these systems is shifted 13 mV from the half-wave membrane potential. We have applied this expression to study the ion transfer of drugs with different pharmacological activities (verapamil, clomipramine, tacrine, and imipramine), at a solvent polymeric membrane ion sensor.
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