Unbiased Selectivity Coefficients Obtained for the Pulsed Chronopotentiometric Polymeric Membrane Ion Sensors

摘要

We report here on the successful observation of the unbiased thermodynamic selectivity of galvanostatically controlled ion-selective sensors. In contrast to that of their potentiometric counterparts, the selectivity of the sensors is not affected by the conditioning procedure or composition of inner filling solution. For the K-selective sensor considered here, a 1000-fold difference in biased and thermodynamic selectivity was found.