Dispersion in Chromatography Columns: Dispersion Processes Diffusion Process

Dispersion in Chromatography Columns
by RPW Scott
part of the Chrom Ed. Series

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(5)

where (D_m) is the Diffusivity of the solute in the fluid.

and is the concentration gradient at (x).

Now, mass of solute leaving the slice (dx) thick, at (x+dx), i.e., (m_x+dx), is,

Thus, the net change in mass per unit time in the slice (dx) thick will be

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