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Extraction: Advanced Methods00:56

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Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is...
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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 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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Application of Ternary Deep Eutectic Solvent in Liquid-Phase Microextraction Techniques.

Enoch Olvera-Ureña1, Begoña Aguilar-Perez1, Karen A Escamilla-Lara1

  • 1Area Academica de Quimica, Universidad Autonoma del Estado de Hidalgo, Mineral de la Reforma, Hidalgo, Mexico.

Critical Reviews in Analytical Chemistry
|July 10, 2025
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Summary
This summary is machine-generated.

Ternary deep eutectic solvents (DESs) offer improved performance over traditional solvents. These advanced DESs enhance extraction efficiency and selectivity in various applications.

Keywords:
Liquid-phase microextractionsample preparationternary deep eutectic solvent

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Area of Science:

  • Green Chemistry
  • Analytical Chemistry
  • Materials Science

Background:

  • Deep eutectic solvents (DESs) are increasingly used as environmentally friendly alternatives to traditional organic solvents.
  • DESs offer advantages like ease of preparation, low toxicity, and component accessibility, making them suitable for liquid phase microextraction.
  • Limitations of binary DESs, including solubility, viscosity, selectivity, and stability issues, have driven the development of ternary DESs.

Purpose of the Study:

  • To review and classify ternary deep eutectic solvents (DESs).
  • To discuss emerging trends in ternary DES development and their applications.
  • To highlight the improved characteristics and extraction capabilities of ternary DESs.

Main Methods:

  • Classification of ternary DESs based on synthesis components: hydrophilic, hydrophobic, magnetic, supramolecular, and polymeric.
  • Discussion of interaction mechanisms for extraction processes.
  • Analysis of applications across various matrices and target compounds.

Main Results:

  • Ternary DESs exhibit enhanced physical and chemical properties compared to binary DESs.
  • Improved extraction efficiency, selectivity, stability, dispersion, and separation characteristics are observed.
  • Successful application in diverse matrices for various target compounds.

Conclusions:

  • Ternary DESs represent a significant advancement in solvent technology, overcoming limitations of binary DESs.
  • Their tunable properties and enhanced performance make them highly promising for analytical extraction and other applications.
  • Further research into interaction mechanisms and applications will continue to expand their utility.