Another empirical correlation for predicting the diffusion coefficient of large molecules and polymers was given by Polson and later used to look at biopolymers by Young et al. where D has the units...

Another empirical correlation for predicting the diffusion coefficient of large molecules and polymers was given by Polson and later used to look at biopolymers by Young et al.

where D has the units of m2/s. Use this expression to calculate the diffusivity of Fluorescein (Mw—332), IgG (Mw—150,000), and Phycoerythrin (Mw—240,000) in water at 25°C. Compare with data taken for diffusion in gels (mostly water) by de Beer et al. How close are the predicted and measured values?