Current Response of Ionophore-Based Ion-Selective Electrode Membranes at Controlled Potential

Authors

  • Werner E. Morf
  • Titus Zwickl
  • Ernö Pretsch
  • Nico F. de Rooij

DOI:

https://doi.org/10.2533/000942903777678759

Keywords:

Current response, Ion-selective electrodes, Theory

Abstract

From electrochemical measurements at the interface of two immiscible electrolytes, the current at controlled potential is usually a linear function of the ion concentration in the aqueous phase. Surprisingly, a linear relationship between the current and the logarithm of the sample ion activity is found here for corresponding measurements on ion-selective electrode membranes. Here we document these new findings and give a theoretical explanation for the apparent contradiction between the results obtained with the two kinds of systems.

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Published

2003-10-01

Issue

Section

Scientific Articles

How to Cite

[1]
W. E. Morf, T. Zwickl, E. Pretsch, N. F. de Rooij, Chimia 2003, 57, 639, DOI: 10.2533/000942903777678759.