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Related Concept Videos

Extraction: Advanced Methods00:56

Extraction: Advanced Methods

405
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...
405
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,...
208

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Related Experiment Video

Updated: May 31, 2025

Microfluidic-based Synthesis of Covalent Organic Frameworks COFs: A Tool for Continuous Production of COF Fibers and Direct Printing on a Surface
08:42

Microfluidic-based Synthesis of Covalent Organic Frameworks COFs: A Tool for Continuous Production of COF Fibers and Direct Printing on a Surface

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[Research advance of solid-phase microextraction based on covalent organic framework materials].

Ying-Chao Cheng1, Yi-Yang Gao1, Xiao-Min Li1

  • 1School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China.

Se Pu = Chinese Journal of Chromatography
|January 23, 2025
PubMed
Summary

Covalent organic frameworks (COFs) enhance solid-phase microextraction (SPME) by improving analyte extraction efficiency and selectivity. These advanced materials offer superior performance for environmental and food safety analysis.

Keywords:
bioanalysischromatographic analysiscovalent organic frameworks (COFs)environmental analysisfood analysisreviewsolid-phase microextraction (SPME)

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Area of Science:

  • Analytical Chemistry
  • Materials Science

Context:

  • Solid-phase microextraction (SPME) is a crucial sample preparation technique for sensitive analysis.
  • Developing novel extractive coatings is vital for enhancing SPME efficiency and selectivity.
  • Covalent organic frameworks (COFs) offer unique properties for advanced material development.

Purpose:

  • To review recent advances in using COFs for SPME applications.
  • To highlight the development of COF-based materials for fiber-, in-tube, and membrane-based SPME.
  • To discuss the potential and future trends of COFs in SPME.

Summary:

  • COFs have been successfully integrated into SPME techniques, including fiber, in-tube, and membrane formats.
  • COF-modified SPME materials demonstrate efficient extraction of various analytes like PAHs, phthalates, PCBs, pesticides, and bisphenols.
  • These methods offer good enrichment, wide linear ranges, and high sensitivity for complex sample matrices.

Impact:

  • COF-based SPME significantly improves analytical method sensitivity and selectivity.
  • Expands the application of SPME in environmental monitoring, food safety, and biomedical analysis.
  • Paves the way for next-generation sample preparation technologies with enhanced performance.