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Related Concept Videos

Capillary Electrophoresis: Applications01:30

Capillary Electrophoresis: Applications

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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,...
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Electrophoresis: Overview01:20

Electrophoresis: Overview

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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...
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Ion-Exchange Chromatography01:09

Ion-Exchange Chromatography

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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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Capillary Electrophoresis: Instrumentation01:20

Capillary Electrophoresis: Instrumentation

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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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Electrospray Ionization (ESI) Mass Spectrometry01:12

Electrospray Ionization (ESI) Mass Spectrometry

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Higher molecular weight biomolecules are nonvolatile compounds that may decompose before ionizing or vaporizing during mass analysis with conventional electron impact ionization methods. Accordingly, electrospray ionization (ESI) is the favored method for vaporizing and ionizing biomolecules as it circumvents rapid fragmentation and enables the recording of mass signals for the entire biomolecule.
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Size-Exclusion Chromatography01:08

Size-Exclusion Chromatography

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In size-exclusion chromatography (SEC), also known as molecular-exclusion or gel-permeation chromatography, molecules are separated based on their sizes. This technique is important for separating large molecules such as polymers and biomolecules. The two classes of micron-sized stationary phases encountered in SEC are silica particles and cross-linked polymer resin beads. Both materials are porous, but their pore sizes vary significantly.
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Microemulsion Electrokinetic Chromatography.

Wolfgang Buchberger1

  • 1Institut für Analytische Chemie, Universität Linz, TNF-Tower, T 209, Altenbergerstraße 69, Linz, 4040, Austria. wolfgang.buchberger@jku.at.

Methods in Molecular Biology (Clifton, N.J.)
|September 21, 2016
PubMed
Summary
This summary is machine-generated.

Microemulsion electrokinetic chromatography (MEEKC) offers versatile separations for neutral and charged species. This technique enhances sensitivity through on-capillary preconcentration, overcoming limitations of UV detection.

Keywords:
Capillary electrophoresisElectrokinetic chromatographyHydrophobic interactionMicroemulsionPseudostationary phase

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Area of Science:

  • Analytical Chemistry
  • Separation Science

Background:

  • Microemulsion electrokinetic chromatography (MEEKC) utilizes microemulsions as carrier electrolytes.
  • Analytes partition between aqueous and oil droplet phases, acting as pseudostationary phases.

Purpose of the Study:

  • To summarize reliable MEEKC conditions for routine analysis.
  • To highlight MEEKC's suitability for separating diverse analyte classes, including neutral, cationic, and anionic species.

Main Methods:

  • Employing microemulsions as carrier electrolytes in capillary electrophoresis.
  • Utilizing charged oil droplets (via surfactants) for neutral analyte separation.
  • Adjusting separation parameters by adding organic solvents, varying surfactants/cosurfactants, or using additives.

Main Results:

  • MEEKC effectively separates a wide range of analytes with a single set of parameters.
  • Resolution and analysis time can be fine-tuned through method modifications.
  • On-capillary preconcentration effectively circumvents poor concentration sensitivity with UV detection.

Conclusions:

  • MEEKC is a powerful technique for diverse analytical separations.
  • The method offers efficient preconcentration, enhancing detection sensitivity.
  • MEEKC provides a reliable platform for routine analytical applications.