A compound present in a standard sample of known concentration and volume which is
analysed separately from the unknown sample under identical conditions. It is used
to facilitate the qualitative indentification and/or quantitative determination of
the sample components. The volume of the external standard (standard sample) need
not to be known if it is identical to that of the unknown sample.
Source:
PAC, 1993, 65, 819
(Nomenclature for chromatography (IUPAC Recommendations 1993))
on page 837
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.
