A technique in which the identities of the sample components are intentionally changed
between sample introduction and detection. The reaction can take place upstream of
the column when the chemical identity of the individual components passing through
the column differs from that of the original sample, or between the column and the
detector when the original sample components are separated in the column but their
identity is changed prior to entering the detection device.
Source:
PAC, 1993, 65, 819
(Nomenclature for chromatography (IUPAC Recommendations 1993))
on page 827