mass distribution ratio, \(k_{\text{MEKC}}\)

in micellar electrokinetic chromatography
Defined as: \[k_{\text{MEKC}} = \frac{n_{\text{mc}}}{n_{\text{aq}}} = K\cdot \frac{V_{\text{mc}}}{V_{\text{aq}}}\] where \(n_{\text{mc}}\) and \(n_{\text{aq}}\) are the chemical amounts of the @A00331@ in the micellar and aqueous phases, respectively, \(K\) is the @D01813@ and \(V_{\text{mc}}\) and \(V_{\text{aq}}\) are the corresponding volumes of the phases.
  1. In the case of an electrically neutral analyte, \(k_{\text{MEKC}}\) can be calculated directly from the @M03920@ times: \[k_{\text{MEKC}} = \frac{t_{\text{m}} - t_{\text{eo}}}{t_{\text{eo}}(1 - t_{\text{m}}/t_{\text{mc}})}\]
  2. \(k_{\text{MEKC}}\) should not be confused with the retention factor (in @C01182@) \(k\). However, \(k_{\text{MEKC}}\) is analogous to the @E02305@ (in @C01075@).
PAC, 2004, 76, 443. (Terminology for analytical capillary electromigration techniques (IUPAC Recommendations 2003)) on page 449 [Terms] [Paper]