In-Groove Carbon Nanotubes Device for SPME of Aromatic Hydrocarbons |
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Authors: | Edita Adomaviciute Kristina Jonusaite Jurgis Barkauskas Vida Vickackaite |
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Institution: | (1) Faculty of Chemistry, Vilnius University, Naugarduko 24, 03225 Vilnius, Lithuania |
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Abstract: | A new solid phase microextraction (SPME) fibre using carbon nanotubes as fibre coating incorporated into a groove of a stainless
steel rod is suggested. It is mechanically stable and exhibits relatively high thermal stability (up to 280 °C). The coating
showed especially good extraction efficiency for aromatic hydrocarbons. The extraction properties of the fibre to benzene,
toluene, ethylbenzene and o-xylene were examined using both direct and headspace SPME modes coupled to gas chromatography-flame ionization detection.
The parameters affecting the extraction efficiency (extraction temperature and time, salt addition, desorption temperature
and time) were investigated and quality parameters were measured under the optimized conditions. For both headspace and direct
SPME the calibration graphs were linear up to 100 mg L−1 (R
2 > 0.996) and detection limits ranged from 0.09 to 0.39 μg L−1. The repeatabilities were 5.9–13.3%. The proposed coating was applied for aromatic hydrocarbons determination in petrol station
waste waters. |
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Keywords: | Gas chromatography Solid phase microextraction Carbon nanotubes coating Aromatic hydrocarbons |
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