Dispersion in Chromatography Columns - Dispersion Processes that take Place in an LC Column > Longitudinal Diffusion > The Diffusion Process > Page 20


         where (t"o) is the kinetic dead time, ( Plate Theory and Extensions)

                    (k") is the kinetic capacity ratio.

The kinetic dead time and the kinetic capacity factors are calculated from the kinetic dead volume as opposed to the thermodynamic dead volume

Then from (7),       

      where (Ds) is now the solute Diffusivity in the stationary phase..

However, in this case, over the time period (tr), a fraction of time  is spent by the solute in the stationary phase and, thus,