COMBINED USE OF VARIOUS EXPERIMENTAL TECHNIQUES FOR DETERMINATION OF 9 DIFFUSION COEFFICIENTS IN 4-COMPONENT SYSTEMS

The procedures of isothermal diffusion studies of four-component systems2 are extended so that data from different types of diffusion experiments may be combined to evaluate the nine diffusion coefficients. It is possible to combine data from the same boundary condition as well as from different boundary conditions provided the same intensive property is measured. It appears that certain combinations of the experimental quantities, such as from Gouy and Rayleigh optical measurements of free diffusion, may give improved values of diffusion coefficients compared to the procedures described previously.2 Theoretical interpretations of these general procedures are given.