From porous aromatic frameworks to nanoporous carbons: A novel solid-phase microextraction coating.

Area of Science:

• Materials Science
• Analytical Chemistry
• Environmental Science

Background:

• Nanoporous carbon materials offer unique properties for analytical applications.
• Porous aromatic frameworks (PAFs) are versatile precursors for advanced carbon materials.
• Solid-phase microextraction (SPME) is a widely used technique for sample analysis.

Purpose of the Study:

• To synthesize a novel nanoporous carbon (NPC) material using PAF-6.
• To develop a PAF-6 derived NPC (PAF-6-NPC) based SPME fiber for n-alkane determination.
• To evaluate the performance of the PAF-6-NPC SPME method in water and soil samples.

Main Methods:

• Synthesis of PAF-6 derived NPC using KOH activation.
• Fabrication of SPME fibers coated with PAF-6-NPC.
• Gas chromatography-flame ionization detection (GC-FID) for n-alkane analysis.
• Method validation including linearity, limits of detection, and repeatability.

Main Results:

• The PAF-6-NPC material exhibited excellent properties as an SPME coating.
• The developed SPME method showed large enhancement factors and low detection limits for n-alkanes.
• High recovery rates (89.5-102.9% for water, 86.0-104.5% for soil) were achieved.
• The PAF-6-NPC fiber demonstrated robust stability over 100 extraction cycles.

Conclusions:

• The novel PAF-6-NPC material is a promising candidate for SPME applications.
• The PAF-6-NPC fiber-based SPME method provides a sensitive and reliable approach for n-alkane determination.
• This method is successfully applicable to real-world water and soil sample analysis.