Solute sedimentation is accelerated if the solution or dispersion under study is allowed to settle in osmotic contact with the solvent, in a dialysis cell. By using the linear formalism of non-equilibrium thermodynamics it is found that apparent sedimentation coefficients (in the osmotically assisted sedimentation) are orders of magnitude larger than “normal” sedimentation coefficients. Moreover, the apparent sedimentation coefficients increase with increasing solute concentration, cell height and dialysis cell membrane area. These results may assist the experimenter’s decisions regarding a choice between osmosedimentation and normal sedimentation techniques.
ASJC Scopus subject areas
- Physics and Astronomy(all)