Application of polymer nonocomposits in solid phase microextraction

Solid phase microextraction (SPME), nowadays, is regarded asa well-established and solvent-free extraction technique and hasbeen applied for the determination of a variety of chemicals indifferent samples. In this technique the extraction process is pre-dominantly performed on fragile fused silica-based fibers .Therefore access to appropriate fiber coatings is one of the most critical steps in SPME. One importantstrategy to improve the sensitivity of SPME relies on the usage ofnanostructured materials in which the interactions between thedesired chemicals and the fiber coating are enhanced. The developments of new fibers are mostly focused on improving the thermal,mechanical and chemical stabilities, imparting diverse functionalities and polarities and enhancing their extraction capacity.The use of polymer nanocomposites-based coatings and replacing thefragile fused silica substrates by metallic wires are amongthe recent approaches toward achieving an overall stability for the prepared fibers.