Sensitivity and Selectivity of Ion-Selective Electrodes Interpreted Using the Nernst-Planck-Poisson Model

Jerzy J. Jasielec, Zekra Mousavi, Kim Granholm, Tomasz Sokalski, Andrzej Lewenstam

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The Nernst-Planck-Poisson model is used for modeling the sensitivity and selectivity of ion-selective electrodes (ISEs) with plastic membranes. Two pivotal parameters characterizing ISE response are in focus: sensitivity and selectivity. An interpretation of sensitivity, which considers the concurrent influence of anions and cations on the ISE slope, is presented. The interpretation of selectivity shows the validity and limits of approaches hitherto taken to measure the true (unbiased) selectivity coefficient. The validity of more idealized interpretations by the diffusion-layer model is conceived.

Original languageUndefined/Unknown
Pages (from-to)9644–9649
JournalAnalytical Chemistry
Issue number15
Publication statusPublished - 2018
MoE publication typeA1 Journal article-refereed

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