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Deposition of Porous Sorbents on Fabric Supports
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Substrateless graphene fiber: a sorbent for solid-phase microextraction.

Yan-Bo Luo1, Bi-Feng Yuan, Qiong-Wei Yu

  • 1Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), Department of Chemistry, Wuhan University, Wuhan 430072, China.

Journal of Chromatography. A
|November 8, 2012
PubMed
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A novel graphene fiber, prepared using a simple hydrothermal method, offers superior performance for solid-phase microextraction (SPME) of organochlorine pesticides (OCPs). This advanced material enables sensitive and reliable environmental water analysis.

Area of Science:

  • Materials Science
  • Analytical Chemistry
  • Environmental Science

Background:

  • Organochlorine pesticides (OCPs) pose environmental and health risks, necessitating sensitive detection methods.
  • Traditional solid-phase microextraction (SPME) sorbents have limitations in efficiency and reusability.
  • Development of advanced sorbent materials is crucial for improved analytical performance.

Purpose of the Study:

  • To synthesize a novel, substrateless graphene fiber using a facile hydrothermal strategy.
  • To evaluate the performance of the graphene fiber as a solid-phase microextraction (SPME) sorbent for organochlorine pesticides (OCPs).
  • To develop and validate a headspace (HS)-SPME-GC/ECD method utilizing the graphene fiber for OCP determination in environmental water samples.

Main Methods:

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  • Substrateless graphene fiber preparation via hydrothermal synthesis.
  • Headspace solid-phase microextraction (HS-SPME) technique.
  • Gas chromatography coupled with an electron capture detector (GC/ECD) for OCP analysis.

Main Results:

  • The graphene fiber demonstrated higher extraction efficiencies, enhanced thermal stability (up to 310°C), and superior reusability (>180 cycles) compared to commercial fibers.
  • The developed HS-SPME-GC/ECD method achieved low limits of detection (0.83-11.5 ng/L) and wide linear dynamic ranges.
  • Successful application to environmental water samples yielded good recoveries (81-121%) and satisfactory precisions (RSD < 9%).

Conclusions:

  • The substrateless graphene fiber is a highly efficient and stable sorbent for SPME analysis of OCPs.
  • The proposed HS-SPME-GC/ECD method offers a sensitive, reliable, and robust approach for OCP determination in environmental matrices.
  • This advancement provides a valuable tool for environmental monitoring and pesticide residue analysis.