An operation (process) as a result of which microcomponents are selectively isolated
from a sample. It is used when the simultaneous presence of several components in
the concentrate may distort the results of analysis. Selective preconcentration usually
is achieved by isolation of the microcomponent to be determined.
PAC, 1979, 51, 1195
(Separation and preconcentration of trace substances. I - Preconcentration for inorganic
on page 1197
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