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Related Concept Videos

Capillary Electrophoresis: Applications01:30

Capillary Electrophoresis: Applications

Capillary electrophoretic separations offer various modes, each with unique applications. These modes include capillary zone electrophoresis, capillary gel electrophoresis, capillary array electrophoresis, capillary isoelectric focusing, capillary isotachophoresis, micellar electrokinetic chromatography, and capillary electrochromatography.
Capillary zone electrophoresis (CZE) separates ionic components based on their electrophoretic mobility. It has been used to separate proteins, amino acids,...
Electrophoresis: Overview01:20

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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.
There...
Capillary Electrophoresis: Instrumentation01:20

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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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Chemical Affinity-Based Isolation of Extracellular Vesicles from Biofluids for Proteomics and Phosphoproteomics Analysis
09:28

Chemical Affinity-Based Isolation of Extracellular Vesicles from Biofluids for Proteomics and Phosphoproteomics Analysis

Published on: October 27, 2023

Electromembrane extraction from biological fluids.

Nickolaj Jacob Petersen1, Knut Einar Rasmussen, Stig Pedersen-Bjergaard

  • 1Department of Pharmaceutics and Analytical Chemistry, Faculty of Pharmaceutical Sciences, University of Copenhagen, Copenhagen, Denmark.

Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry
|October 12, 2011
PubMed
Summary
This summary is machine-generated.

Electromembrane extraction (EME) offers rapid, selective drug isolation from biological fluids using a supported liquid membrane (SLM) and electrical potential. This technique significantly reduces extraction times and is suitable for micro-scale sample volumes.

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Area of Science:

  • Analytical Chemistry
  • Separation Science
  • Biomedical Engineering

Background:

  • Supported liquid membrane (SLM) technology is utilized for sample preparation.
  • Electromembrane extraction (EME) is a novel technique for ionic drug extraction.
  • Traditional methods often involve lengthy extraction times and complex procedures.

Purpose of the Study:

  • To introduce and evaluate electromembrane extraction (EME) as a new sample preparation technique.
  • To demonstrate the efficiency and versatility of EME for drug extraction from biological fluids.
  • To highlight the advantages of EME over existing liquid-phase microextraction (LPME) techniques.

Main Methods:

  • Ionic drugs were extracted from biological fluids using a supported liquid membrane (SLM).
  • An electrical potential (1-300 V) was applied across the SLM to facilitate ion transfer.
  • Extractions were performed using both fiber-based and flat-sheet SLM supports, including microfluidic formats.

Main Results:

  • EME achieved significantly reduced extraction times (6-17 fold faster than LPME), down to seconds in microfluidic devices.
  • The technique provided efficient sample clean-up and was effective for low µL sample volumes.
  • Successful extraction from untreated human plasma and whole blood demonstrated compatibility with complex biological matrices.

Conclusions:

  • Electromembrane extraction (EME) is a highly efficient and rapid technique for sample preparation.
  • EME offers selective drug isolation and concentration from biological fluids, even from complex matrices.
  • The technique is versatile, scalable, and compatible with various biological samples, showing promise for clinical and forensic applications.