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Preparation of Highly Porous Coordination Polymer Coatings on Macroporous Polymer Monoliths for Enhanced Enrichment of Phosphopeptides
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Nanoparticle-templated hierarchically porous polymer/zeolitic imidazolate framework as a solid-phase microextraction

Milad Ghani1, Saeed Masoum1, Sayed Mehdi Ghoreishi1

  • 1Department of Analytical Chemistry, Faculty of Chemistry, University of Kashan, Kashan, Iran.

Journal of Chromatography. A
|July 2, 2018
PubMed
Summary

A novel polymer/zeolitic imidazolate framework (ZIF) coating was developed for solid-phase microextraction (SPME). This method efficiently extracts benzene, toluene, ethylbenzene, and xylenes (BTEX) from water samples with high sensitivity.

Keywords:
BTEXHierarchically porous materialsPolymer monolithsSolid-phase microextractionZeolitic imidazolate frameworksZnO nanoparticles

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Area of Science:

  • Analytical Chemistry
  • Materials Science

Background:

  • Solid-phase microextraction (SPME) is a widely used technique for sample preparation.
  • Developing advanced SPME coatings with enhanced extraction capabilities is crucial for trace analysis.

Purpose of the Study:

  • To develop a novel polymer/zeolitic imidazolate framework (ZIF) monolithic coating for headspace SPME.
  • To evaluate the efficiency of this coating for the extraction of benzene, toluene, ethylbenzene, and xylenes (BTEX) from water samples.

Main Methods:

  • A two-step ZnO nanoparticle-directed method was used to create polymer/ZIF monolith coatings on stainless steel wires.
  • The coatings were applied to headspace SPME of BTEX from water samples.
  • Analysis was performed using gas chromatography-flame ionization detection (GC-FID).

Main Results:

  • The hierarchically porous polymer/ZIF monolithic coatings demonstrated superior performance for BTEX extraction compared to other tested coatings.
  • Optimized experimental parameters led to low limits of detection (0.02-0.11 μg/L) and wide linear ranges (0.2-200 μg/L).
  • High recoveries (>88%) were achieved for BTEX analysis in various water matrices.

Conclusions:

  • The developed polymer/ZIF monolithic SPME coatings offer a highly efficient and sensitive method for BTEX determination in water.
  • The hierarchical porosity and ZIF incorporation contribute to the enhanced extraction performance.
  • This technique shows great potential for environmental monitoring and water quality assessment.