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.

Innovative cavitand-based sol-gel coatings for the environmental monitoring of benzene and chlorobenzenes via solid-phase microextraction / F. BIANCHI; M. MATTAROZZI; P. BETTI; F. BISCEGLIE; M. CARERI; A. MANGIA; L. SIDISKY; S. ONGARATO; E. DALCANALE. - In: ANALYTICAL CHEMISTRY. - ISSN 0003-2700. - 80:(2008), pp. 6423-6430. [10.1021/ac800881g]

Innovative cavitand-based sol-gel coatings for the environmental monitoring of benzene and chlorobenzenes via solid-phase microextraction

BIANCHI, Federica;MATTAROZZI, Monica;BETTI, Paolo;BISCEGLIE, Franco;CARERI, Maria;MANGIA, Alessandro;DALCANALE, Enrico
2008

Abstract

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.
Innovative cavitand-based sol-gel coatings for the environmental monitoring of benzene and chlorobenzenes via solid-phase microextraction / F. BIANCHI; M. MATTAROZZI; P. BETTI; F. BISCEGLIE; M. CARERI; A. MANGIA; L. SIDISKY; S. ONGARATO; E. DALCANALE. - In: ANALYTICAL CHEMISTRY. - ISSN 0003-2700. - 80:(2008), pp. 6423-6430. [10.1021/ac800881g]
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11381/2295713
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