chapter  4
24 Pages

Potentiometric Ion Sensors: Host–Guest Supramolecular Chemistry in Ionophore-Based Ion-Selective Membranes

Ion-selective potentiometry looks back more than a century, being among the earliest instrumental methods of analysis. Its very beginning is marked by fundamental contributions on understanding the electrode potential of electrodes of the ˆrst and second kind as well as the potential difference arising at the interface

Introduction .............................................................................................................. 81 Ionophore-Based Membranes and Potentiometric Cell Conˆgurations ..................84 Theoretical Treatment of Potential Response ..........................................................86 Selectivity Coefˆcients and Their Relationship to Ion-Ionophore Complex Stabilities..................................................................................................................88 Determination of Concentration and Diffusion Coefˆcients of Ionophores and Ion-Ionophore Complexes in Liquid Membranes ...................................................90 Determination of Complex Formation Constants ....................................................92 Outlook ....................................................................................................................99