Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Linear two-step gradient counter-current chromatography analysis based on a recursive solution of an equilibrium

Daria Beltscheva1, Peter Hugo, Andreas Seidel-Morgenstern

  • 1Otto-von-Guericke-Universität Magdeburg, Institut für Verfahrenstechnik, P.O. Box 4120, D-39106 Magdeburg, Germany.

Journal of Chromatography. A
|March 19, 2003
PubMed
Summary

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Comparison of rate models for gradient elution chromatography and experimental evaluation for IEC, HIC, and RPC systems.

Journal of chromatography. A·2026
Same author

Separation of Enantiomers of the Chiral Arginine System: Solid-Phase Characterization, Solubility Phase Diagrams, and Preferential Crystallization.

ACS omega·2025
Same author

Chromatographic method to isolate valuable ingredients of saffron extracts.

Journal of chromatography. A·2025
Same author

Experimental and model-based approach to evaluate solvent effects on the solubility of the pharmaceutical artemisinin.

European journal of pharmaceutical sciences : official journal of the European Federation for Pharmaceutical Sciences·2024
Same author

Real-Time Crystal Growth Monitoring of Boric Acid from Sodium or Lithium Sulfate Containing Aqueous Solutions by Atomic Force Microscopy.

ACS omega·2023
Same author

Shortcut Model for Batch Preferential Crystallization Coupled with Racemization for Conglomerate-Forming Chiral Systems.

Crystal growth & design·2022

Gradient counter-current chromatography enhances separation performance by adjusting solvent strength. This study presents a model to optimize these complex two-step gradient processes for improved efficiency.

Area of Science:

  • Chemical Engineering
  • Separation Science
  • Chromatography

Background:

  • Continuously operated chromatographic counter-current processes are effective separation methods.
  • Implementing gradients, particularly in solvent strength, can significantly improve performance.
  • Optimizing two-step gradient processes presents design and control challenges.

Purpose of the Study:

  • To develop and present a simplified model for simulating two-step gradient counter-current chromatography.
  • To provide an efficient algorithm for evaluating a wide range of operating conditions and gradient types.
  • To systematically analyze the impact of key parameters on process performance.

Main Methods:

  • Utilized a steady-state equilibrium stage model for process simulation under linear conditions.

Related Experiment Videos

  • Developed a rapid algorithm to efficiently describe the chromatographic unit, even for large stage numbers.
  • Conducted parametric calculations to assess the influence of adsorption equilibrium, stage number, and purity requirements.

    • Main Results:

    • The developed algorithm efficiently simulates the process, enabling systematic evaluation of various operating conditions.
    • Demonstrated the significant impact of adsorption equilibrium constants' dependence on solvent composition.
    • Highlighted the influence of the number of equilibrium stages and purity specifications on process outcomes.

    Conclusions:

    • The study emphasizes the considerable potential of two-step gradient counter-current chromatography for enhanced separations.
    • The presented modeling approach offers an efficient tool for the design and optimization of such chromatographic systems.
    • Systematic evaluation of parameters is crucial for realizing the full benefits of gradient elution in counter-current chromatography.