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Fabrication of versatile and robust hydrophobic sodium oleate-modified MOF as fiber for solid phase microextraction of polycyclic aromatic hydrocarbons

  • 0School of Chemistry and Environmental Engineering, State Key Laboratory of Green and Efficient Development of Phosphorus Resources, Wuhan Institute of Technology, Wuhan, 430205, China.
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September 25, 2025

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September 25, 2025

View abstract on PubMed

Summary

This summary is machine-generated.

A new hydrophobic composite coating was developed for solid-phase microextraction (SPME) to efficiently detect polycyclic aromatic hydrocarbons (PAHs) in environmental and food samples. This advanced material offers improved moisture resistance and sensitive analysis of pollutants.

Area Of Science

  • Materials Science
  • Analytical Chemistry
  • Environmental Science

Background

  • Conventional metal-organic frameworks (MOFs) used in SPME coatings often suffer from moisture sensitivity, limiting their application in complex environmental and food matrices.
  • Polycyclic aromatic hydrocarbons (PAHs) are persistent organic pollutants requiring sensitive and reliable detection methods for environmental and food safety monitoring.

Purpose Of The Study

  • To develop a novel hydrophobic composite material for enhanced SPME performance.
  • To improve the moisture resistance and extraction efficiency of MOF-based SPME coatings.
  • To enable sensitive and reliable detection of PAHs in diverse sample types.

Main Methods

  • Synthesis of a hydrophobic NH2-UiO-66@NaOA composite via surface functionalization of NH2-UiO-66 with sodium oleate (NaOA).
  • Application of the composite as a coating for SPME.
  • Analysis of extracted PAHs using Gas Chromatography-Flame Ionization Detection (GC-FID).
  • Validation of the method's sensitivity, linearity, and reproducibility.

Main Results

  • The NH2-UiO-66@NaOA composite exhibited excellent moisture resistance and enhanced PAHs extraction efficiency due to synergistic hydrophobic and π-π stacking interactions.
  • The optimized SPME-GC-FID method achieved high sensitivity (LODs: 0.014–0.083 ng mL⁻¹), a wide linear range (0.2–200 ng mL⁻¹), and good reproducibility (RSD ≤ 7.71%).
  • The method was successfully applied to real environmental water and food samples, demonstrating its reliability in complex matrices.

Conclusions

  • The developed hydrophobic MOF composite is a robust and effective SPME coating for sensitive PAH detection.
  • The surface modification strategy offers broad applicability, extendable to other MOF structures.
  • This technology holds significant potential for monitoring trace-level persistent organic pollutants in environmental and food safety applications.

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