Emission Intensity Readout of Ion-Selective Electrodes Operating under an Electrochemical Trigger

We report for the first time on in situ transduction of electro-chemical responses of ion-selective electrodes, operating under non-zero-current conditions, to emission change signals. The proposed novel-type PVC-based membrane comprises a dispersed redox and emission active ion-to-electron transducer. The electrochemical trigger applied induces a redox process of the transducer, inducing ion exchange between the membrane and the solution, resulting also in change of its emission spectrum. It is shown that electrochemical signals recorded for ion-selective electrodes operating under voltammetric/coulometric conditions correlate with emission intensity changes recorded in the same experiments. Moreover, the proposed optical readout offers extended linear response range compared to electrical signals recorded in voltammetric or coulometric mode.

Automated summary

This study reports for the first time on the in situ transduction of ion-selective electrodes' electrochemical responses to emission change signals under non-zero-current conditions. By introducing a dispersed redox and emission active ion-to-electron transducer on a PVC-based membrane, the electrochemical trigger induces ion exchange between the membrane and solution, resulting in changes to the emission spectrum. Additionally, the proposed optical readout offers a wider linear response range compared to traditional electrical signals in voltammetric or coulometric mode.