請用此 Handle URI 來引用此文件: http://hdl.handle.net/11455/35090
標題: Determination of aniline in silica gel sorbent by one-step in situ microwave-assisted desorption coupled to headspace solid-phase microextraction and GC-FID
作者: Yan, C.T.
鄭政峰
Shih, T.S.
Jen, J.F.
關鍵字: aniline
microwave-assisted desorption
headspace SPME
GC-FID
silica
gel
performance liquid-chromatography
electron-capture detection
gas-chromatography
aromatic-amines
mass-spectrometry
water
chlorophenols
samples
air
chemistry
期刊/報告no:: Talanta, Volume 64, Issue 3, Page(s) 650-654.
摘要: Microwave-assisted desorption (MAD) coupled to in situ headspace solid-phase microextraction (HS-SPME) was first proposed as a possible alternative pretreatment of samples in absorbent collected from workplace monitoring. Aniline collected on silica get was investigated. Under microwave irradiation, the aniline was desorbed from silica gel and directly absorbed onto the SPME fiber in the headspace. Having been sampled on the SPME fiber, and desorbed in the GC injection port, aniline was analyzed using a GC-FID system. Parameters that affect the proposed extraction efficiency, including the extraction media and its pH, the microwave irradiation power and the irradiation time as well as desorption parameters of the GC injector, were investigated. Experimental results revealed that the extraction of a 150-mg silica gel sample using a 0.8-ml aqueous solution (pH 12) and a PDMS/DVB fiber under medium-high-powered irradiation (345 W) for 3 min maximized the efficiency of extraction. Desorption of aniline from the SPME fiber was optimal at 230degreesC held for 3 min. The detection limit was 0.09 ng. The proposed method provided a simple, fast, and organic solvent-free procedure to analyze aniline from a silica gel matrix. (C) 2004 Elsevier B.V. All rights reserved.
URI: http://hdl.handle.net/11455/35090
ISSN: 0039-9140
文章連結: http://dx.doi.org/10.1016/j.talanta.2004.03.053
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