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Related Concept Videos

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 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.
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Ion Exchange

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Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
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Supercritical Fluid Chromatography01:18

Supercritical Fluid Chromatography

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Supercritical fluid chromatography (SFC) provides a beneficial substitute for gas chromatography (GC) and liquid chromatography (LC) for certain samples because it merges the top attributes of both techniques. SFC allows the separation and analysis of compounds that GC or LC does not easily manage. These compounds are traditionally nonvolatile or thermally unstable, making GC unsuitable and lacking functional groups required for HPLC analysis.
SFC utilizes a supercritical fluid mobile phase,...
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High-Performance Liquid Chromatography: Introduction01:11

High-Performance Liquid Chromatography: Introduction

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High-performance liquid chromatography(HPLC), formerly referred to as High-pressure liquid chromatography, is a powerful technique used to separate, identify, and quantify components in complex mixtures. The term "high pressure" refers to using high pressure to push the liquid mobile phase through the tightly packed columns.
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Principles Of Column Chromatography01:13

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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...
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Recent advances on ionic liquid uses in separation techniques.

A Berthod1, M J Ruiz-Ángel2, S Carda-Broch3

  • 1Institut des Sciences Analytiques, Université de Lyon, CNRS, 5 rue de la Doua, 69100, Villeurbanne, France.

Journal of Chromatography. A
|September 30, 2017
PubMed
Summary
This summary is machine-generated.

Ionic liquids (ILs) are versatile molten salts revolutionizing separation sciences. This review highlights their advanced applications in nuclear waste, high-temperature gas chromatography, and sensitive mass spectrometry detection.

Keywords:
Deep eutectic solventGas chromatographyIonic liquidsLiquid chromatographyTrace anion detection

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Area of Science:

  • Separation Science
  • Green Chemistry
  • Analytical Chemistry

Background:

  • Ionic liquids (ILs) are molten organic salts (<100°C) with unique solvent properties like negligible vapor pressure and high thermal stability.
  • Their tunable characteristics (viscosity, polarity, etc.) make them adaptable for diverse separation applications.
  • This review updates previous work, focusing on recent advancements in ILs, particularly alkyl methylimidazolium salts.

Purpose of the Study:

  • To review recent developments in the application of ionic liquids (ILs) in various separation techniques.
  • To highlight the expanded capabilities and new applications of ILs since 2008.
  • To introduce related deep eutectic solvents (DES) and their use in countercurrent chromatography.

Main Methods:

  • Literature review of recent research on ionic liquids in separation science.
  • Focus on advancements in gas chromatography, liquid chromatography, capillary electrophoresis, and mass spectrometry.
  • Inclusion of studies on nuclear waste reprocessing and deep eutectic solvents.

Main Results:

  • Ionic liquids enable high-temperature gas chromatography (>300°C) with specialized columns.
  • Tailor-made ILs facilitate highly sensitive mass spectrometry detection of trace anions (femtogram level).
  • ILs are increasingly used in nuclear waste reprocessing and advanced chromatographic techniques.

Conclusions:

  • Ionic liquids offer exceptional and tunable properties for advanced separation science.
  • Recent developments show significant progress in IL applications across chromatography, electrophoresis, and mass spectrometry.
  • Deep eutectic solvents represent a related class of compounds with emerging applications in chromatography.