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Related Concept Videos

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...
Principles Of Column Chromatography01:13

Principles Of Column Chromatography

The chromatography technique was first invented in 1901 by Michael S. Tswett, a Russian botanist, to separate plant pigments using organic solvents. Further, in 1941, Archer John Porter Martin and R. L. M. Synge modified the technique by packing silica gel into a column. A mixture of amino acids was then separated on the packed column using chloroform and water mixture as the mobile phase. This was the first report on column chromatography. At present, column chromatography is a widely used...
Chromatography: Introduction01:10

Chromatography: Introduction

Chromatography is a technique used to separate compounds based on differences of partitioning between two phases, the stationary phase and the mobile phase.
The phase in which the compounds linger or on which the compounds adsorb is called the stationary phase, whereas the mobile phase is the solvent that carries the solutes to be analyzed. In traditional column chromatography, the mixture flows through the stationary phase, and the compounds partition between the stationary and mobile phases...
Gas Chromatography: Types of Columns and Stationary Phases01:17

Gas Chromatography: Types of Columns and Stationary Phases

Gas chromatography (GC) relies on stationary phases to separate and analyze components in a sample. There are two main types of stationary phases: liquid and solid. Liquid stationary phases are non-volatile, thermally stable, and chemically inert liquids coated onto the column. Solid stationary phases are particles of adsorbent material, such as silica gel or molecular sieves.
For an analyte to remain on the column for a sufficient amount of time, it must exhibit some level of compatibility (or...
Optimizing Chromatographic Separations01:15

Optimizing Chromatographic Separations

Optimizing chromatographic separations is crucial for obtaining clean separations in a minimum amount of time. Optimization is required for several factors, including kinetic effects related to band broadening, plate height, capacity factor, and separation factor.
Band broadening refers to spreading solute bands as they travel through the column. This broadening can impact resolution. Plate height (H) represents the length required for one theoretical plate. A lower plate height corresponds to...
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...

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Curtain Flow Column: Optimization of Efficiency and Sensitivity
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Published on: June 12, 2016

Solvent modulation of column chromatography.

Tsutomu Arakawa1, Yoshiko Kita, Daisuke Ejima

  • 1Alliance Protein Laboratories, Thousand Oaks, CA 91360, USA. tarakawa2@aol.com

Protein and Peptide Letters
|August 6, 2008
PubMed
Summary
This summary is machine-generated.

Co-solvents, such as arginine and ethylene glycol, can significantly improve protein recovery and resolution in various column chromatography techniques beyond traditional salt and pH adjustments. This review explores their diverse applications for enhanced chromatographic performance.

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Area of Science:

  • Biochemistry
  • Analytical Chemistry
  • Chemical Engineering

Background:

  • Traditional column chromatography relies on salts (e.g., ammonium sulfate, NaCl) and pH adjustments for protein separation.
  • These conventional methods may not always yield optimal protein recovery and resolution.
  • Co-solvents offer an alternative approach to enhance chromatographic performance.

Purpose of the Study:

  • To review the applications of co-solvents in various column chromatography techniques.
  • To highlight how co-solvents can improve protein separation efficiency.
  • To provide a summary of co-solvent usage beyond standard buffers.

Main Methods:

  • Literature review of co-solvent applications in chromatography.
  • Analysis of co-solvent effects on protein recovery and resolution.
  • Categorization of co-solvents and their specific uses in different chromatography types.

Main Results:

  • Co-solvents like ethylene glycol and MgCl2 have been used for antibody elution in affinity chromatography.
  • Arginine demonstrates broad applicability across size exclusion chromatography (SEC), hydrophobic interaction chromatography (HIC), and affinity chromatography.
  • Polyethylene glycol and glycine enhance performance in HIC and hydroxyapatite chromatography.

Conclusions:

  • Co-solvents represent a valuable tool for optimizing column chromatography performance.
  • Their application can lead to improved protein recovery and resolution compared to traditional methods.
  • Further exploration of co-solvent utility can advance protein purification strategies.