| Summary: | 碩士 === 國立東華大學 === 化學系 === 99 === A novel anodized TiO2 nanotube wire for headspace solid phase microextraction (HS-SPME) coupled with Gas Chromatography-Mass Spectrometry (GC-MS) for benzene, toluene, ethylbenzene, xylene (BTEX) analysis is described. The 6 hours anodizing time and 450°C annealing temperature obtain the best TiO2 nanotube in Ti wire. The Optimal extraction condition for BTEX is as follow: extraction time, 1 min ; extraction temperature, 60°C ; NaCl, 0.2g; desorption temperature, 250°C; desorption time, 2min. The limit of detections (LOD) for benzene, toluene, ethylbenzene and xylene are 0.1, 0.5, 1 and 2 µg/L, respectively with the wider linear range (from 0.5- 15000 µg/L)) and satisfactory linearity, R2 ≥0.9954. The TiO2 nanotube wire shows superior extraction efficiency than commercial PDMS (polydimethylsiloxane) fiber. The TiO2 nanotube wire is a promising technique for BTEX analysis.
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