New materials in solid-phase microextraction

• New materials used in solid-phase microextraction (SPME) in recent years are reviewed.
• Structure, features and applications of fibers for solid-phase microextraction (SPME).
• Review on developing fiber coatings for solid-phase microextraction (SPME).

We review the new and most commonly used coating materials for solid-phase microextraction (SPME) in the past five years. We discuss ionic liquids (ILs), polymeric ILs, graphene, carbon nanotubes, molecularly imprinted polymers and metal-organic frameworks, based on the recent trends in SPME-fiber coatings. The designable basic structures indicate the possibilities for developing more task-specific SPME fibers using these materials.