10.1021/ac800881g.s001 Federica Bianchi Federica Bianchi Monica Mattarozzi Monica Mattarozzi Paolo Betti Paolo Betti Franco Bisceglie Franco Bisceglie Maria Careri Maria Careri Alessandro Mangia Alessandro Mangia Leonard Sidisky Leonard Sidisky Stefano Ongarato Stefano Ongarato Enrico Dalcanale Enrico Dalcanale Innovative Cavitand-Based Sol−Gel Coatings for the Environmental Monitoring of Benzene and Chlorobenzenes via Solid-Phase Microextraction American Chemical Society 2008 cavitand repeatability stability morphology subnanogram microextraction desorption extraction recoveries term capability Innovative soil samples hydrocarbon chlorobenzenes sampling 94.7 LOD values MicroextractionAn trace levels film thickness presence sol determination liter range pollutant Benzene river water Coatings pH resistance coating technology recovery Extraction efficiency Environmental Monitoring device RSD 87.4 Sol Chlorobenzene 2008-08-15 00:00:00 Journal contribution https://acs.figshare.com/articles/journal_contribution/Innovative_Cavitand_Based_Sol_Gel_Coatings_for_the_Environmental_Monitoring_of_Benzene_and_Chlorobenzenes_via_Solid_Phase_Microextraction/2920408 An innovative and very selective solid-phase microextraction coating synthesized by sol−gel technology was developed for the determination of environmental pollutants such as aromatic hydrocarbons at trace levels in air, water, and soil samples. The obtained fibers, composed of quinoxaline-bridged cavitand units, were characterized in terms of film thickness, morphology, thermal stability, and pH resistance. Fibers, characterized by an average thickness of 56 ± 6 μm, exhibited an excellent thermal stability until 400 °C and a very good fiber-to-fiber and batch-to-batch repeatability with RSD lower than 6%. Finally, the capabilities of the developed coating for the selective sampling of aromatic hydrocarbons were proved, obtaining LOD values in the subnanogram per liter range. Extraction efficiency at least 2-fold higher than that obtained using commercial devices was proved for chlorobenzenes sampling in river water, obtaining extraction recoveries ranging from 87.4 ± 2.6% to 94.7 ± 1.9%. The selective desorption of benzene in the presence of high amounts of other airborne pollutants was also demonstrated.