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

Elisa Hupa, Ulriika Vanamo, Johan Bobacka

Research output: Contribution to journalArticleScientificpeer-review

37 Citations (Scopus)

Abstract

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.
Original languageUndefined/Unknown
Pages (from-to)591–594
JournalElectroanalysis
Volume27
Issue number3
DOIs
Publication statusPublished - 2015
MoE publication typeA1 Journal article-refereed

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