The equilibrium relation between the concentration of a sample component in the
, and in the
expressed as a function
The relation can be influenced also by concentrations of other sample components.
are usually expressed per unit volume of the phase;
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.
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: http://goldbook.iupac.org (2006-) created by M. Nic,
J. Jirat, B. Kosata; updates compiled by A. Jenkins. ISBN 0-9678550-9-8. https://doi.org/10.1351/goldbook