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.
Source:
PAC, 1979, 51, 1195
(Separation and preconcentration of trace substances. I - Preconcentration for inorganic
trace analysis)
on page 1197