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Modelling counter-current and dual counter-current chromatography using longitudinal mixing cell and eluting
Artak E Kostanyan1, Vera V Belova, Anatoly I Kholkin
1Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninsky prosp. 31, Moscow 119991, Russia. kost@igic.ras.ru
Journal of Chromatography. A
|April 6, 2007
Summary
This study compares two models for counter-current chromatography, finding their theoretical elution profiles differ. A new equation is presented for dual counter-current chromatography solute distribution.
Area of Science:
- Analytical Chemistry
- Separation Science
Background:
- Counter-current chromatography (CCC) is a liquid-liquid partition chromatography technique.
- Analyzing CCC processes is crucial for optimizing separation efficiency.
Purpose of the Study:
- To compare the longitudinal mixing cell model and Craig's counter-current distribution (CCD) model for analyzing CCC.
- To derive a solute distribution equation for dual CCC.
Main Methods:
- Theoretical comparison of elution profiles using the cell model and CCD model.
- Mathematical derivation of solute distribution for dual CCC.
Main Results:
- Distribution functions of the CCD and cell models generally differ.
- A novel equation, Q(x)=(1-c(m))/(1-c(n+1)), describes dual CCC solute distribution based on extraction factor, equilibrium stages, and sample inlet position.
Conclusions:
- The choice of model impacts the theoretical analysis of CCC processes.
- The derived equation provides a quantitative method for predicting solute distribution in dual CCC.
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