The equilibrium relation between the concentration of a sample component in the
stationary phase
, and in the
mobile phase
,
expressed as a function
.
Note:
The relation can be influenced also by concentrations of other sample components.
and
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.
Source:
PAC, 1996, 68, 1591
(Nomenclature for non-linear chromatography (IUPAC Recommendations 1996)) on page 1592
This definition supersedes an earlier definition of distribution isotherm.
Cite as:
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.
in liquid-liquid distribution
