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A highly thermal-resistant electrospun-based polyetherimide nanofibers coating for solid-phase microextraction.

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A novel high-temperature-resistant solid-phase microextraction (SPME) fiber made from polyetherimide (PEI) nanofibers was developed. This new SPME coating efficiently extracts polycyclic aromatic hydrocarbons from water samples.

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Area of Science:

  • Analytical Chemistry
  • Materials Science

Background:

  • Polycyclic aromatic hydrocarbons (PAHs) are significant environmental pollutants.
  • Developing robust and efficient extraction methods for PAHs is crucial for environmental monitoring.

Purpose of the Study:

  • To develop a high-temperature-resistant solid-phase microextraction (SPME) fiber using polyetherimide (PEI) nanofibers.
  • To optimize the SPME method for the extraction of environmentally important PAHs from aqueous samples.

Main Methods:

  • Electrospinning of polyetherimide (PEI) to create nanofibers coated on stainless steel SPME needles.
  • Optimization of PEI coating parameters and headspace SPME conditions (temperature, time, ionic strength, desorption).
  • Analysis of PAHs using gas chromatography-mass spectrometry (GC-MS) with time-scheduled selected ion monitoring.

Main Results:

  • Homogeneous PEI nanofibers with diameters of 500-650 nm were successfully prepared.
  • Optimized method achieved low detection limits (1-5 ng L(-1)) and good precision (1.1-7.1% RSD).
  • High linearity (5-1000 ng L(-1)) and excellent recovery rates (84-98%) in real water samples were demonstrated.

Conclusions:

  • The developed PEI-based SPME fiber offers a promising, high-temperature-resistant alternative for PAH analysis.
  • The method is sensitive, precise, and suitable for the determination of PAHs in environmental water samples.
  • This advancement contributes to improved environmental monitoring capabilities for persistent organic pollutants.