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Environmental monitoring of complex hydrocarbon mixtures in water and soil samples after solid phase microextraction using PVC/MWCNTs nanocomposite fiber

Matin, Amir Abbas, Biparva, Pourya, Gheshlaghi, Mohammad, Farhadi, Khalil, Gheshlaghi, Ali
Chemosphere 2013 v.93 pp. 1920-1926
BTEX (benzene, toluene, ethylbenzene, xylene), carbon nanotubes, coatings, environmental monitoring, nanocomposites, petroleum, pollutants, poly(vinyl chloride), river water, scanning electron microscopy, soil sampling, solid phase microextraction, stainless steel
A novel nanocomposite based on incorporation of multiwalled carbon nanotubes (MWCNTs) in polyvinyl chloride (PVC) was prepared. Proposed nanocomposite was coated on stainless steel wire by deep coating. Composition of nanocomposite was optimized based on results of morphological studies using scanning electron microscopy. The best composition (83% MWCNTs:17% PVC) was applied as a solid phase microextraction fiber. Complex mixture of aromatic (BTEX) and aliphatic hydrocarbons (C5–C34) were selected as model analytes, and performance of proposed fiber in extraction of the studied compounds from water and soil samples was evaluated. Analytical merits of the method for water samples (LODs=0.10–1.10ngL−1, r2=0.9940–0.9994) and for soil samples (LODs=0.10–0.77ngkg−1, r2=0.9946–0.9994) showed excellent characteristics of it in ultra trace determination of petroleum type environmental pollutants. Finally, the method was used for determination of target analytes in river water, industrial effluent and soil samples.