Preparation by low-temperature nonthermal plasma of graphite fiber and its characteristics for solid-phase microextraction |
| |
Authors: | Fan Luo Ping Tao |
| |
Affiliation: | a Department of Environmental Engineering, State Key Laboratory of Clean Energy Utilization, Key Laboratory of Polluted Environment Remediation and Ecological Health, MOE, Zhejiang University, Hangzhou 310027, PR China b Institute of Structural Mechanics, China Academy of Engineering Physics, Mianyang 621900, PR China c College of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, PR China |
| |
Abstract: | Low-temperature nonthermal plasma has been used to prepare solid-phase microextraction (SPME) fibers with high adsorbability, long-term serviceability, and high reproducibility. Graphite rods serving as fiber precursors were treated by an air plasma discharged at 15.2-15.5 kV for a duration of 8 min. Sampling results revealed that the adsorptive capacity of the homemade fiber was 2.5-34.6 times that of a polyacrylate (PA) fiber for alcohols (methanol, ethanol, isopropyl alcohol, n-butyl alcohol), and about 1.4-1.6 times and 2.5-5.1 times that of an activated carbon fiber (ACF) for alcohols and BTEX (benzene, toluene, ethylbenzene, and xylenes), respectively. It is confirmed from FTIR (Fourier transform infrared spectrophotometer) and SEM (scanning electron microscope) analyses that the improvement in the adsorptive performance attributed to increased surface energy and roughness of the graphite fiber. Using gas chromatography (GC)-flame-ionization detector (FID), the limits of detection (LODs) of the alcohols and BTEX ranged between 0.19 and 3.75 μg L−1, the linear ranges were between 0.6 and 35619 μg L−1 with good linearity (R2 = 0.9964-0.9997). It was demonstrated that nonthermal plasma offers a fast and simple method for preparing an efficient graphite SPME fiber, and that SPME using the homemade fiber represents a sensitive and selective extraction method for the analysis of a wide range of organic compounds. |
| |
Keywords: | Solid-phase microextraction Graphite fiber Nonthermal plasma Adsorption |
本文献已被 ScienceDirect 等数据库收录! |
|