A new open source software for the calculation of the liquid junction potential between two solutions according to the stationary Nernst-Planck equation

TL;DR

This paper introduces an open source software tool that calculates liquid junction potentials and ion fluxes by solving the stationary Nernst-Planck equations, aiding electrochemical research.

Contribution

It provides a freely accessible software implementing a novel approach to compute junction potentials considering variable ion diffusion coefficients.

Findings

Software accurately computes potential differences and ion fluxes.

Allows user-defined ion concentrations and diffusion dependencies.

Facilitates research in electrochemistry with open source tool.

Abstract

We describe an open source software which we have realized and made publicly available at the website http://jljp.sourceforge.net. It provides the potential difference and the ion fluxes across a liquid junction between the solutions of two arbitrary electrolytes. The calculation is made by solving the Nernst-Planck equations for the stationary state in conditions of local electrical quasi-neutrality at all points of the junction. The user can arbitrarily assign the concentrations of the ions in the two solutions, and also specify the analytical dependence of the diffusion coefficient of each ion on its concentration.