Mass transfer kinetics measurements by thermal frequency response method

Summary A frequency response method based on the temperature measurement of a sample by I.R. emission is described. The possibilities of this thermal method, are shown by some results obtained on the NaX-water system which has very fast kinetics. Precise determination of the Fickian diffusion coefficient and the surface barrier are obtained even for such a fast system. The results agree well with N.M.R. results obtained for the same crystals.