Determination of Volatile Water Pollutants Using Cross-Linked Polymeric Ionic Liquid as Solid Phase Micro-Extraction...

Area of Science:

• Analytical Chemistry
• Materials Science

Background:

• Ionic liquids are versatile due to their unique properties, finding applications in catalysis and extraction.
• Solid Phase Micro-extraction (SPME) is a widely used technique for sample preparation and analysis.

Purpose of the Study:

• To develop a novel copolymer SPME coating for enhanced extraction of polycyclic aromatic hydrocarbons (PAHs).
• To optimize the SPME method for the determination of PAHs in water samples.

Main Methods:

• A copolymer coating was synthesized using ethylene glycol dimethacrylate and 1-vinyl-3-butylimidazolium tetrafluoroborate via free-radical polymerization.
• The copolymer was applied to a surface-modified stainless-steel wire to create an SPME fiber.
• Extraction parameters such as monomer/cross-linker ratio, porogen amount, and polymerization time were optimized.
• The SPME device was coupled with gas chromatography for PAH analysis.

Main Results:

• The optimized SPME fiber demonstrated effective extraction of five common PAHs.
• The method exhibited a wide linear range, low detection limits, good reproducibility, and high selectivity.
• The developed SPME device showed excellent thermal stability.

Conclusions:

• The novel copolymer SPME coating is a promising tool for the sensitive and selective determination of PAHs in water.
• This SPME fiber offers potential for environmental monitoring and analysis of complex matrices.