preconcentration coefficient

of a desired microcomponent

in trace analysis

This is defined as

$K = Q T Q M Q T o Q M o$

where $Q T$ and $Q T o$ are the quantities of the microcomponent in the concentrate and in the sample, respectively (mass units or concentration units), and $Q M o$ and $Q M$ and are the quantities of the matrix before and after preconcentration, respectively. If the recovery is 100%, $K = Q M o Q M$ . The terms enrichment coefficient and enrichment factor are not recommended.

Source:

PAC, 1979, 51, 1195 (Separation and preconcentration of trace substances. I - Preconcentration for inorganic trace analysis) on page 1198

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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.

Last update: 2014-02-24; version: 2.3.3.

DOI of this term: https://doi.org/10.1351/goldbook.P04804.

Original PDF version: http://www.iupac.org/goldbook/P04804.pdf. The PDF version is out of date and is provided for reference purposes only. For some entries, the PDF version may be unavailable.

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