Open AccessEmission Intensity Readout of Ion-Selective Electrodes Operating under an Electrochemical Trigger
Author(s) -
Katarzyna Węgrzyn,
Justyna Kalisz,
Emilia Stelmach,
Krzysztof Maksymiuk,
Agata Michalska
Publication year - 2021
Publication title -
analytical chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.117
H-Index - 332
eISSN - 1520-6882
pISSN - 0003-2700
DOI - 10.1021/acs.analchem.1c00857
Subject(s) - chemistry , coulometry , electrode , electrochemistry , ion , analytical chemistry (journal) , transducer , redox , inorganic chemistry , chromatography , physics , organic chemistry , quantum mechanics
We report for the first time on in situ transduction of electrochemical 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.