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Related Concept Videos

Diffusion on Chromatography Columns01:07

Diffusion on Chromatography Columns

In column chromatography, when an analyte is introduced as a narrow band at the top of the column, the solutes begin to separate and broaden, developing a Gaussian profile. This broadening occurs due to various factors, such as longitudinal diffusion.
Longitudinal diffusion occurs when the solute molecules in the mobile phase diffuse from the more concentrated center of the chromatographic band to the more dilute regions on either side, both towards and against the flow direction. This...
Column Efficiency: Rate Theory01:12

Column Efficiency: Rate Theory

The rate theory of chromatography provides quantitative insight into the shapes and widths of elution bands. These bands are based on the random-walk mechanism governing molecular migration within a column. The Gaussian profile of chromatographic bands arises from the cumulative effect of random molecular motions as they progress through the column.
During elution, a solute molecule experiences numerous transitions between stationary and mobile phases, exhibiting irregular residence times in...
Chromatographic Resolution01:15

Chromatographic Resolution

In chromatography, a solute moves through a chromatographic column and tends to spread, forming a Gaussian-shaped band. The longer the solute spends in the column, the broader the band becomes. The broadening can lead to overlaps within the column, affecting separation effectiveness.
The effectiveness of separation can be evaluated by determining the level of separation between two neighboring peaks in a chromatogram, which represents the individual components of a sample.
In chromatography,...
Chromatographic Methods: Terminology01:18

Chromatographic Methods: Terminology

Chromatography is an analytical technique widely used in fields such as chemistry, biology, environmental science, and pharmaceuticals to separate the components of a mixture and identify substances between them. The process of chromatography is based on the interactions between two distinct phases: the stationary phase and the mobile phase. The stationary phase is fixed in place by a supporting material, while the mobile phase moves over it, carrying the solutes. As the mobile phase travels,...
High-Performance Liquid Chromatography: Elution Process01:05

High-Performance Liquid Chromatography: Elution Process

In High-Performance Liquid Chromatography (HPLC), the elution process is critical to the separation of analytes and the quality of chromatographic results. Elution describes how compounds move through the column and separate based on their interactions with the mobile and stationary phases. This process determines the resolution, peak shape, and retention times in the chromatogram, which are essential for identifying and quantifying components in complex mixtures. Understanding the elution...
Ion-Exchange Chromatography01:09

Ion-Exchange Chromatography

Ion-exchange chromatography, or IEC, is a technique for separating ions based on their affinity for the stationary phase. The stationary phase is a cross-linked polymer resin with covalently attached ionic functional groups. The functional groups can be either positively charged (cation exchangers) or negatively charged (anion exchangers). A cation exchanger consists of a polymeric anion and active cations, while an anion exchanger is a polymeric cation with active anions. The choice of...

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Related Experiment Video

Updated: Jul 3, 2026

Curtain Flow Column: Optimization of Efficiency and Sensitivity
06:44

Curtain Flow Column: Optimization of Efficiency and Sensitivity

Published on: June 12, 2016

Displacement effects in large-scale chromatography?

A Jungbauer1, K Uhl, P Schulz

  • 1Institute of Applied Microbiology, University of Bodenkultur, Nussdorferlaende 11 82, A-1190 Vienna, Austria.

Biotechnology and Bioengineering
|March 5, 1992
PubMed
Summary
This summary is machine-generated.

Displacement effects in large-scale ion-exchange chromatography were studied for purifying superoxide dismutase. Optimizing elution conditions improved biomolecule resolution and recovery.

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Area of Science:

  • Biochemistry
  • Chromatography
  • Protein Purification

Background:

  • Large-scale purification of biomolecules like human erythrocyte superoxide dismutase (hESOD) is crucial.
  • Ion-exchange chromatography (IEC) is a common method for protein purification.
  • Understanding displacement effects in IEC is key to optimizing purification processes.

Purpose of the Study:

  • To investigate displacement effects during large-scale and preparative ion-exchange chromatography of hESOD.
  • To compare experimental elution data with theoretical predictions using the Yamamoto model.
  • To provide guidance on achieving beneficial displacement phenomena for improved resolution and recovery.

Main Methods:

  • Large-scale (150 L total column volume) and preparative ion-exchange chromatography.
  • Step gradient elution to elute biomolecules behind the salt wave.
  • Application of the Yamamoto model for theoretical calculation of peak width and retention behavior.
  • Comparison of theoretical predictions with experimental elution data.

Main Results:

  • Biomolecules, including hESOD, were eluted in a very small peak volume (<0.2 v(o)) behind the salt wave.
  • A discrepancy was observed between theoretical elution type I (fronting) and experimental results.
  • Specific conditions leading to beneficial displacement phenomena were identified.

Conclusions:

  • Displacement effects in IEC can lead to highly concentrated elutions with small peak volumes.
  • The Yamamoto model provides a theoretical framework, but experimental validation is essential.
  • Controlled displacement phenomena offer a strategy to enhance resolution and recovery in biomolecule purification.