Diffusion in liquid systems. II. Computer-assisted measurement of diffusion coefficients at various temperatures

Abstract

A physical description of the dispersion of solutes in Poiseuille flow and its analogy to Fickian diffusion is presented. The superior accuracy of the computerized data acquisition and processing technique over the graphical method of obtaining diffusion coefficients from the retention volume distribution (RVD) of solutes in capillaries is demonstrated. The diffusion coefficients of various organic compounds in chloroform at different temperatures were measured and activation energies calculated.