IUPAC > Gold Book > alphabetical index > M > mass distribution ratio, k MEKC in micellar electrokinetic chromatography


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.
  1. 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 )
  2. 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).
PAC, 2004, 76, 443 (Terminology for analytical capillary electromigration techniques (IUPAC Recommendations 2003)) on page 449
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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. doi:10.1351/goldbook.
Last update: 2014-02-24; version: 2.3.3.
DOI of this term: doi: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 The PDF version is out of date and is provided for reference purposes only.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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