Innovative Cavitand-Based Sol−Gel Coatings for the Environmental Monitoring of Benzene and Chlorobenzenes via Solid-Phase Microextraction
Federica Bianchi
Monica Mattarozzi
Paolo Betti
Franco Bisceglie
Maria Careri
Alessandro Mangia
Leonard Sidisky
Stefano Ongarato
Enrico Dalcanale
10.1021/ac800881g.s001
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.
2008-08-15 00:00:00
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