Inside needle capillary adsorption trap device for headspace solid-phase dynamic extraction based on...

Area of Science:

• Analytical Chemistry
• Materials Science
• Environmental Science

Background:

• Polycyclic aromatic hydrocarbons (PAHs) are significant environmental pollutants.
• Efficient extraction methods are crucial for PAH analysis in aqueous samples.
• Developing advanced sorbent materials can improve analytical performance.

Purpose of the Study:

• To fabricate an inside needle capillary adsorption trap (INCAT) device.
• To utilize a highly porous polyaniline/hexagonally ordered silica sorbent for PAH extraction.
• To develop and optimize a method for PAH determination in aqueous solutions.

Main Methods:

• Synthesis of polyaniline/SBA-15 nanocomposite via chemical polymerization.
• Fabrication of the INCAT device using the synthesized nanocomposite.
• Optimization of extraction parameters (temperature, time, ionic strength, flow rate, desorption conditions).
• Analysis of PAHs using gas chromatography-mass spectrometry (GC-MS).

Main Results:

• The optimized INCAT method achieved low quantitation limits (1-5 pg mL(-1)) for tested PAHs.
• Repeatability was good, with relative standard deviations between 4.2% and 10.2%.
• Successful application to spiked spring water samples with high relative recovery (87.3-109.1%).

Conclusions:

• The developed INCAT device provides a simple, cost-effective, and thermally stable solution for PAH extraction.
• The method offers shorter analysis times compared to conventional techniques.
• This approach demonstrates high efficiency for trace-level PAH determination in environmental water samples.