Techniques based on the distribution of components being separated between two phases,
one of which is stationary and the other mobile. The advantage of some chromatographic
methods is the possibility of combining the
preconcentration and determination steps, as well as improving the speed of determination, and the
possibility of separation of components with similar properties, and of achieving
high values of the
preconcentration coefficient.
The methods enable analyses of microamounts of substances.
Ion-exchange chromatography is not widely used owing to the great volumes of solutions being treated and, consequently,
to a great degree to the variation in the blank, and to some diffusional limitations.
Static ion-exchange, which is much simpler and more readily carried out, is practised
quite widely.
Source:
PAC, 1979, 51, 1195
(Separation and preconcentration of trace substances. I - Preconcentration for inorganic
trace analysis)
on page 1199
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.
