The sections in this article are
Zero‐current Electrochemical Cells Incorporating Ion‐selective Membranes
Selectivity of Potentiometric Membrane Electrodes
Glass Electrodes
Solid‐state Electrodes
Liquid Membrane Electrodes
Ion‐exchangers
Neutral Ionophores
Charged Ionophores
Gas‐sensing Probes
Ion‐selective Electrode‐based Biosensors