Dispersion in Chromatography Columns - The Random Walk Model > Page 8
Lateral Movement/Particle =
It follows, that the average lateral step will be,
Employing the random walk function, the radial variance will be given by:- (2)
Now assuming one lateral step is taken by a molecule for every distance (jdp) that it moves axially, then, (n) the number of steps is given by:-
where (l) is the distance traveled axially by the solute band.
Thus, substituting for (n) in equation (2),