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Modeling counter-current chromatography with non-ideal injection.

Haijun Chen1, Jianfeng Chen1, Tao Tang2

  • 1School of Mechanical Engineering, Sichuan University, Chengdu 610065, China.

Journal of Chromatography. A
|February 27, 2020
PubMed
Summary
This summary is machine-generated.

This study introduces a non-ideal counter-current chromatography (CCC) model that incorporates actual injection profiles. This approach accurately simulates elution profiles, revealing how injection characteristics impact peak shape and chromatography performance.

Keywords:
Cell modelCountercurrent chromatographyInjection profileNon-ideal injectionSimulation

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Area of Science:

  • Chromatography
  • Separation Science
  • Analytical Chemistry

Background:

  • Off-column fittings in counter-current chromatography (CCC) systems cause sample diffusion.
  • This diffusion leads to an irregular solute distribution at the column inlet, known as the injection profile.
  • Accurate simulation of elution profiles requires incorporating the actual injection profile into models.

Purpose of the Study:

  • To develop and validate a non-ideal CCC model that utilizes actual injection profiles.
  • To determine conditions under which a simplified, discrete injection profile can substitute for the actual profile in simulations.
  • To elucidate the relationship between injection profiles and elution profiles in CCC.

Main Methods:

  • Construction of a non-ideal CCC model with initial values derived from actual injection profiles.
  • Validation of the model's rationality using an iteration method.
  • Simulation analysis of various injection profiles to identify conditions for accurate discrete injection profile usage.

Main Results:

  • The non-ideal CCC model accurately reflects the relationship between injection and elution profiles.
  • Simulation analysis identified specific conditions where discrete injection profiles suffice for accurate elution simulation.
  • The model helps explain irregular elution phenomena such as peak tailing and flattening.

Conclusions:

  • Incorporating actual injection profiles into non-ideal CCC models is crucial for accurate elution simulation.
  • The developed model provides insights into peak shape irregularities by linking them to injection characteristics.
  • This work enhances the predictive power of CCC simulation models for optimizing separation processes.