| Abstract: | Based upon a set of clearly specified assumptions, a universal integral equation is derived which describes the steady-state EMF of an electrochemical cell containing any type of ion-selective membrane electrode. The various modes of delineating the phenomenon ion-selectivity by an explicit function are shown. For all types of analytically important ion-sensitive electrodes, the selectivity between monovalent cations and anions, respectively, can be neatly and comprehensively rationalized. These theoretically derivable expressions are compiled. |
