An operation (process) as the result of which microcomponents are transferred from
the sample of larger mass into the sample of smaller mass, so that the concentration
of the microcomponents is increased. Examples include the decrease in solvent volume
during distillation or
evaporation, and the transfer of microcomponents from an aqueous solution into a smaller volume
of organic solvent by
extraction.
Source:
PAC, 1979, 51, 1195
(Separation and preconcentration of trace substances. I - Preconcentration for inorganic
trace analysis)
on page 1197
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.
