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distribution isotherm

in chromatography
The equilibrium relation between the concentration of a sample component in the stationary phase c S , and in the mobile phase c M, expressed as a function c S = f c M.
The relation can be influenced also by concentrations of other sample components. c S and c M are usually expressed per unit volume of the phase; c S may also be expressed per mass of the dry solid phase or per unit surface area.
In some versions of chromatography, a distribution isotherm can be seen as a partition isotherm, an adsorption isotherm, or a combination of these, depending on the mechanism of separation.
PAC, 1996, 68, 1591 (Nomenclature for non-linear chromatography (IUPAC Recommendations 1996)) on page 1592
This definition supersedes an earlier definition of distribution isotherm.
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IUPAC. Compendium of Chemical Terminology, 2nd ed. (the "Gold Book"). Compiled by A. D. McNaught and A. Wilkinson. Blackwell Scientific Publications, Oxford (1997). XML on-line corrected version: (2006-) created by M. Nic, J. Jirat, B. Kosata; updates compiled by A. Jenkins. ISBN 0-9678550-9-8.
Last update: 2014-02-24; version: 2.3.3.
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