title: A novel multiwalled carbon nanotubes bonded fused-silica fiber for solid phase microextraction-gas chromatographic analysis of phenols in water samples.
abstract: The present work reports on the synthesis of chemically bonded multiwalled carbon nanotubes (MWCNTs)/fused-silica fibers and their use in solid phase microextraction of seven phenols from water samples coupled with gas chromatography (GC). The synthetic strategy was verified by infrared (IR) spectroscopy and field emission scanning electron microscopy. Adsorption factors (pH, ionic strength, stirring rate, adsorption time and temperature) and desorption factors (time and temperature) of the fibers were systematically investigated. Detection limits to seven phenols were less than 0.05 microg L(-1), and their calibration curves were all linear (R(2)> or =0.9984) in the range from 0.05 to 5000 microg L(-1). This method was then utilized to analyze two real water samples from Yellow River and sanitary wastewater, resulting in satisfactory results. Compared with normal solid phase materials, this MWCNTs-bonded fused-silica fibers showed a number of advantages: wide linear range and low detection limit for extracting phenols couple with GC, and good stability in acid, alkali, organic solvents and at high temperature.
authors.affiliation: Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China.
authors.forename: Hongmei
authors.initials: H
authors.lastname: Liu
authors.forename: Jubai
authors.initials: J
authors.lastname: Li
authors.forename: Xia
authors.initials: X
authors.lastname: Liu
authors.forename: Shengxiang
authors.initials: S
authors.lastname: Jiang
mesh_terms: D002849:Chromatography, Gas / Q000379:methods*; D037742:Nanotubes, Carbon; D010636:Phenols / Q000032:analysis*; D012822:Silicon Dioxide; D052617:Solid Phase Microextraction / Q000379:methods*; D014867:Water / Q000032:analysis*
chemical_list: D037742:Nanotubes, Carbon; D010636:Phenols; D014867:Water; D012822:Silicon Dioxide