mass distribution ratio, kMEKC 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