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Functionalization and Dispersion of Carbon Nanomaterials Using an Environmentally Friendly Ultrasonicated Ozonolysis Process
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Monodisperse microporous carbon nanospheres: An efficient and stable solid phase microextraction coating material.

Juan Zheng1, Kun Wang1, Erlun Luo1

  • 1MOE Key Laboratory of Aquatic Product Safety/KLGHEI of Environment and Energy Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, PR China.

Analytica Chimica Acta
|June 16, 2015
PubMed
Summary

Monodisperse microporous carbon nanospheres (MMCNSs) offer a novel solid-phase microextraction material. This new MMCNSs-fiber shows enhanced extraction of pollutants like polycyclic aromatic hydrocarbons (PAHs) and organochlorine pesticides (OCPs) in water.

Keywords:
Monodisperse microporous carbon nanospheresMonodisperse microporous polystyrene nanospheresOrganochlorine pesticidesPolycyclic aromatic hydrocarbonsSolid phase microextraction

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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 novel extraction materials with improved efficiency and stability is crucial for trace analysis.

Purpose of the Study:

  • To introduce monodisperse microporous carbon nanospheres (MMCNSs) as a new SPME material.
  • To evaluate the performance of MMCNSs-based SPME for the extraction of polycyclic aromatic hydrocarbons (PAHs) and organochlorine pesticides (OCPs).

Main Methods:

  • MMCNSs were synthesized using a sol-gel technique.
  • A SPME fiber was prepared using the sol-gel-MMCNSs.
  • The fiber's extraction efficiency was compared to commercial polydimethylsiloxane/divinylbenzene (PDMS/DVB) and polystyrene nanosphere fibers.
  • Analysis was performed using gas chromatography-mass spectrometry (GC-MS).

Main Results:

  • The sol-gel-MMCNSs fiber demonstrated superior extraction capabilities for PAHs and OCPs.
  • The fiber exhibited good repeatability, reproducibility, thermostability, and acid/base durability.
  • Detection limits for PAHs and OCPs ranged from 0.10 to 5.5 ng L(-1).
  • Satisfactory recoveries (81.0-120% and 72.8-118%) were achieved for real water and wastewater samples.

Conclusions:

  • The sol-gel-MMCNSs fiber is a highly effective and stable material for SPME.
  • This method provides sensitive and reliable detection of PAHs and OCPs in aqueous samples.
  • MMCNSs represent a promising new material for environmental analysis and trace contaminant detection.