Simple model for the calculation of concentration and temperature dependent refractive index of different solutions

Simple analytical models for the calculation of concentration (c) and temperature (T) dependent refractive index i.e., n(c,T) values of the six solutions namely, three electrolyte (KCl, NaCl, and CaCl2), a polar (glucose), a non-polar (ethyl acetate), and a protein (bovine serum albumin) solutions have been proposed. The values of refractive index obtained using our proposed models have been compared with the corresponding values of the refractive index obtained using other reported models and the experimental values. A fairly good agreement between them has been obtained.