Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/34001
標題: Determination of aqueous chlorophenols by microwave-assisted headspace solid-phase microextraction and gas chromatography
作者: Wei, M.C.
鄭政峰
Jen, J.F.
關鍵字: gas chromatography;electron-capture detection;microwave-assisted;headspace solid-phase microextraction;chlorophenols in water;performance liquid-chromatography;environmental water samples;trap;mass-spectrometry;human-urine;pesticides;extraction;phenols;pentachlorophenol;herbicides;chemistry
Project: Chromatographia
期刊/報告no:: Chromatographia, Volume 55, Issue 11-12, Page(s) 701-706.
摘要: 
A pretreatment technique denoted microwave-assisted headspace solid-phase microextraction (MAHS-SPME) has been designed and studied for one-step in-situ sample preparation before analysis of aqueous chlorophenols (CP). The aqueous CP are extracted on to a solid-phase microextraction fiber directly in the headspace with the aid of microwave irradiation. After collection on the SPME fiber the CP were desorbed in a GC injection port and analyzed by gas chromatography with electron-capture detection (GC-ECD). Experimental conditions (pH, addition of salt to the sample solution, microwave power and irradiation time, and temperature and time of desorption) were optimized to obtain the most efficient extraction. The results indicated that the highest extraction efficiency (recovery > 93%) and lowest RSD (< 8.0%) were obtained by irradiation of sample solution at pH 2 with medium-power microwaves for 5 min, and desorption at 300 degreesC for 3 min. Detection limits were approximately 0.1 to 2.0 mug L-1. The proposed method is a very simple, rapid, and solvent-free procedure for collection of CP from complicate sample matrixes. Its application was illustrated by the analysis of trace CP in landfill leachates.
URI: http://hdl.handle.net/11455/34001
ISSN: 0009-5893
DOI: 10.1007/bf02491785
Appears in Collections:化學系所

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