Minimum number of turbidity measurements required for the determination of particle size distributions

It has been claimed [D. H. Melik and H. S. Fogler, J. Colloid Interface Sci.92, 161 (1983)] that by combining the turbidity ratio and the wavelength exponent, a two-parameter size distribution of the particles in a suspension can be estimated from only two turbidity measurements at two widely separated wavelengths, in other words that one is able to estimate three independent parameters (number concentration of particles and the two parameters …