Novel ion-to-electron transduction principle for solid-contact ISEs

A1 Journal article (refereed)

Internal Authors/Editors

Publication Details

List of Authors: Elisa Hupa, Ulriika Vanamo, Johan Bobacka
Publication year: 2015
Journal: Electroanalysis
Volume number: 27
Issue number: 3
Start page: 591
End page: 594
eISSN: 1521-4109


Solid-​contact ion-​selective electrodes (SC-​ISEs) are traditionally employed as potentiometric sensors, where the ion activity is related to the zero-​current potential of the sensor vs. the ref. electrode. In this communication, an alternative ion-​to-​electron transduction principle for SC-​ISEs is introduced. The suggested signal transduction principle resembles "const.-​potential coulometry" utilizing the redox capacitance of the internal solid contact in order to convert changes in ion concn. (activity) into elec. current and charge. This short communication provides proof-​of-​concept for the suggested signal transduction method for SC-​ISEs utilizing poly(3,​4-​ethylenedioxythiphene) (PEDOT) as the solid contact that was coated with a cation-​sensitive polymeric membrane.

Last updated on 2020-23-01 at 05:10