Ionophore-Based Ion-Selective Electrodes in Non-Zero Current Modes: Mechanistic Studies and the Possibilities of the Analytical Application
Anna V. Bondar, Valentina M. Keresten, Konstantin N. Mikhelson
Abstract
Abstract This mini review briefly describes (i) literature data on the non-zero current measurements with ionophore-based ion-selective electrodes (ISEs) aimed at fundamental studies of the mechanism of their potentiometric response, and (ii) the data on the possibilities of analytical applications of ISEs in voltametric and constant potential chronoamperometric/coulometric modes, in particular the K + ion assay in blood serum with the sensitivity of 0.1%. A special attention is paid to the basics of voltammetry and chronoamperometry/coulometry with the ionophore-based ISEs, and to how and why these methods differ from the classical voltammetry and coulometry.
Topics & Concepts
CoulometryChronoamperometryChemistryIonophorePotentiometric titrationAnalytical Chemistry (journal)Cyclic voltammetryIonElectroanalytical methodVoltammetryElectrodeIon selective electrodeChromatographyElectrochemistryPhysical chemistrySelectivityCalciumOrganic chemistryCatalysisAnalytical Chemistry and SensorsElectrochemical Analysis and ApplicationsElectrochemical sensors and biosensors