Liquid Junction Potentials. Solutions of different concentrations, or those containing different substances, when in contact across a junction, develop a potential across the interface called a junction potential. This concentration-potential results from different ions having different migrating rates due to their size, weight and shape differences. Such potentials develop across all solution interfaces and will depend on the ionic mobility’s and the concentration gradients involved.

Further Information on this Topic can be found in the books of R.P.W. Scott by following the listed links