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Related Concept Videos

Capillary Electrophoresis: Instrumentation01:20

Capillary Electrophoresis: Instrumentation

Capillary electrophoresis instrumentation typically consists of several key components. A high-voltage power supply generates the electric field necessary for the separation by connecting to an anode (the positively charged electrode) and a cathode (the negatively charged electrode) located in buffer reservoirs at each end of the capillary tube. The system includes a sample vial, a fused silica capillary tube coated with polyimide for mechanical strength through which the sample components...
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Electrophoresis: Overview

Electrophoresis is a powerful analytical separation technique that relies on the differential migration of charged species when subjected to an electric field. The core strength of electrophoresis lies in its ability to separate high-molecular-weight species in complex mixtures. It has found widespread use in biochemistry, molecular biology, and analytical chemistry, allowing the separation of compounds like amino acids, nucleotides, carbohydrates, and proteins with excellent resolution.
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Capillary Electrophoresis: Applications01:30

Capillary Electrophoresis: Applications

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Electrophoretic Separation of Proteins
08:17

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Published on: June 12, 2008

Contemporary sample stacking in analytical electrophoresis.

Andrea Šlampová1, Zdena Malá, Pavla Pantůčková

  • 1Institute of Analytical Chemistry of the Academy of Sciences of the Czech Republic, Brno, Czech Republic.

Electrophoresis
|November 20, 2012
PubMed
Summary

Sample stacking in capillary electrophoresis (CE) concentrates dilute samples for enhanced analysis. This review covers key methods like Kohlrausch, pH step, and micellar techniques published between 2010-2012.

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Area of Science:

  • Analytical Chemistry
  • Separation Science

Background:

  • Sample stacking is crucial for enhancing sensitivity and efficiency in capillary electrophoresis (CE).
  • It involves concentrating analytes from a large sample zone into a sharp band within the capillary.
  • This technique is widely used for analyzing diluted samples.

Purpose of the Study:

  • To provide an overview of sample stacking methods in CE.
  • To review papers published between 2010 and 2012 focusing on specific stacking principles.
  • To continue a series of reviews on electromigration-based stacking techniques.

Main Methods:

  • Focuses on four main principles of sample stacking: Kohlrausch adjustment of concentrations, pH step, micellar methods, and transient isotachophoresis (ITP).
  • Reviews literature published from 2010 to 2012.
  • Excludes transient ITP from this specific review, as it is covered elsewhere.

Main Results:

  • Summarizes advancements and applications of Kohlrausch, pH step, and micellar stacking methods.
  • Highlights the practical implementation of these techniques in CE analyses.
  • Identifies trends and developments in sample stacking over the 2010-2012 period.

Conclusions:

  • Sample stacking remains a vital technique for improving CE performance.
  • The reviewed principles (Kohlrausch, pH step, micellar) are fundamental to many CE applications.
  • Continued research in sample stacking contributes to more sensitive and efficient analytical methods.