mass distribution ratio, $k MEKC$

in micellar electrokinetic chromatography

Defined as:

$k MEKC = n mc n aq = K · V mc V aq$

where $n mc$ and $n aq$ are the chemical amounts of the analyte in the micellar and aqueous phases, respectively, $K$ is the distribution constant and $V mc$ and $V aq$ are the corresponding volumes of the phases.

Notes:

In the case of an electrically neutral analyte, $k MEKC$ can be calculated directly from the migration times:
$k MEKC = t m − t eo t eo ( 1 − t m t mc )$
$k MEKC$ should not be confused with the retention factor (in column chromatography) $k$ . However, $k MEKC$ is analogous to the mass distribution ratio (in chromatography).

Source:

PAC, 2004, 76, 443 (Terminology for analytical capillary electromigration techniques (IUPAC Recommendations 2003)) on page 449

Related index:

IUPAC > Gold Book > math/physics > quantities

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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.MT06928.

Original PDF version: http://www.iupac.org/goldbook/MT06928.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 The PDF version is out of date and is provided for reference purposes only.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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