Diffusion coefficients of l-lysine hydrochloride and l-arginine hydrochloride in their aqueous solutions at 25 degrees C

The diffusion coefficients** of l-lysine hydrochloride and l-arginine hydro chloride in their aqueous solutions at 25 degrees C were determined by the metallic diaphragm cell method which is characterized by accuracy, promptne ss and convenience. Meanwhile, the densities and viscosities of the solutio ns were also determined. Based on all these data a semi-empirical model for correlating the diffusion coefficients of solid organic salts in their aqu eous solutions at 25 degrees C was proposed. The fitting result of this mod el is comparatively satisfactory. Compared to a former model, Gordon Model, this model can avoid a number of difficulties and arduous work.