showing that the quadrupole contribution to the surface potential accounts to 3.50 V, while the dipolar contribution is only 0.012 V. Later, Kathmann and co-workers 32 presented an in-depth investigation into the potential landscape created by point charge and density based water models, and showed how a sampling of the potential along a three-dimensional grid produces the characteristic inner potentials of respective method. That is why in the literature, the Poisson potential of liquid phase is also sometimes called the inner potential. Regardless of different nomenclatures, a common conclusion from all of these studies is that the value (and the sign) of the Poisson potential of liquid phase is strongly dependent on the nature of underlying computational methods. From the Gibbs-Guggenheim principle, it is known that the difference between the inner potential can be measured but not the inner potential itself. Therefore, it raises the question that how the shift in this potential looks like in concentrated solutions from computational models.