DETERMINATION OF FRACTAL REACTION DIMENSION IN DISSOLUTION STUDIES

The paper presents a method for the calculation of fractal reaction dimension, D-R, in dissolution studies of powdered substances with a given particle size distribution. An estimate for D-R can be directly obtained from dissolution experiments using the well known Hixson-Crowell equations in a modified form. The estimation is accomplished with a special computer program in BASIC which was developed and applied to simulated errorless and contaminated data with very good results. A practical demonstration of the method's usefulness was shown on experimental data taken from the literature.