Surface Charge Density/Surface Potential Approximate Analytic Expression for Insid

The nonlinear Poisson-Boltzmann quation （PBE） is solved by perturbation method and linearizing approximation coupled with interation method to obtain two didfferent surface charge density/surface potential approximate analytical expressions for inside of reverse micells,the two approximate analytical expressions are characterized by being fit for the general case of mixed, nonsymmetric electrolyte solution, contrast with exact numerical solution solution of computer shows that the two approximate analytical expressions have percent relative errors of 1.0 and 5.0respectively in the case of general reversed micelles inside surface potential. Thus the partial approximate analytical solution of nonlinear PBE in entire extent is construed.