Phase Boundary Model

Phase Boundary Model for simulating the calibration curves (concentration-potential dependencies) of Ion-Selective Electrodes.

An interface between two liquid or solid phases represents a potential generating system. The phase-boundary potential or interfacial potential difference is caused mainly by the non-uniform distribution of electrically charged species between two phases and differences in single-ion chemical standard potentials. For the details of the model and its solution see:

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Input Data
Exchange constantKex
Charge
of ion
z
Concentration in the left solutioncL [M]
Concentration in the right solutioncR [M]
Primary Ion
Ion  2
* Calibration curve calculated for   concentration points
   with starting CL of ion 1 M
   and concentration multiplier
Temperature K
Results

ISE calibration curve