Silver-based polymeric ionic liquid sorbent coatings for solid-phase microextraction: Materials for the selective...

Area of Science:

• Polymer Chemistry
• Analytical Chemistry
• Materials Science

Background:

• Polymeric ionic liquids (PILs) offer tunable properties for advanced applications.
• Silver-based materials show promise in selective analyte interactions.
• Solid-phase microextraction (SPME) requires innovative sorbent materials for improved performance.

Purpose of the Study:

• To develop and characterize novel silver-based PIL sorbent coatings for SPME.
• To evaluate the thermal stability and extraction efficiency of these new materials.
• To demonstrate the application of these PILs in determining unsaturated compounds and fatty acids.

Main Methods:

• Synthesis of silver-based ionic liquid monomers and their polymerization into PIL sorbent coatings.
• Fabrication of SPME fibers with the developed PIL coatings.
• Application of headspace and direct-immersion SPME techniques for analyte determination.
• Gas chromatography-mass spectrometry (GC-MS) for analyte quantification.

Main Results:

• Seven distinct silver-based PIL sorbent coatings were successfully synthesized.
• The PIL coatings exhibited adequate thermal stability, allowing for high-temperature desorption.
• Selective determination of alkenes/alkynes with terminal double bonds was achieved.
• Sensitive detection of unsaturated fatty acids (oleic, linoleic, linolenic) was demonstrated, comparable to commercial fibers.
• Low limits of detection (2.6–14 μg L⁻¹) and good reproducibility (RSD < 13%) were obtained.
• Successful application in analyzing dairy farm rinse water samples.

Conclusions:

• Silver-based PIL sorbent coatings represent a promising advancement in SPME technology.
• These materials offer enhanced selectivity and sensitivity for unsaturated analytes.
• The developed PILs are suitable for diverse analytical applications, including environmental and food analysis.