請用此 Handle URI 來引用此文件: http://hdl.handle.net/11455/35056
標題: Analysis of hexachlorocyclohexanes in aquatic samples by one-step microwave-assisted headspace control led-temperature liquid-phase microextraction and gas chromatography with electron capture detection
作者: Tsai, M.Y.
鄭政峰
Kumar, P.V.
Li, H.P.
Jen, J.F.
關鍵字: Microwave assisted
Headspace
Liquid-phase microextraction
Hexachlorocyclohexane
Water
GC-ECD
organochlorine pesticides
mass-spectrometry
soil samples
polychlorinated-biphenyls
aqueous samples
hch isomers
water
metabolites
extraction
期刊/報告no:: Journal of Chromatography A, Volume 1217, Issue 12, Page(s) 1891-1897.
摘要: A microwave-assisted headspace controlled-temperature liquid-phase microextraction (HS-CT-LPME) technique was applied for the one-step sample extraction of hexachlorocyclohexanes (HCHs) from aqueous samples with complicate matrices, followed by gas chromatographic (CC) analysis with electron capture detector (ECD) Microwave heating was applied to accelerate the evaporation of HCHs into the headspace and an external-cooling system was used to control the temperature in the sampling zone for HS-LPME Parameters affecting extraction efficiency, such as LPME solvent. sampling position and temperature, microwave power and irradiation time (the same as sampling time), sample pH. and salt addition were thoroughly investigated From experimental results, the following conditions were selected for the extraction of HCHs from 10-mL water sample(pH 2.0) by Using I-octanol as the LPME solvent. with sampling done at 38 degrees C for 6 min under 167 W of microwave irradiation The detections were linear in the concentration of 1-10 mu/L for alpha-HCH and gamma-HCH, and 1-100 mu g/L for beta-HCH and delta-HCH Detection limits were 0 05. 0.4. 0 03 and 0. 1 mu/L for alpha-, beta-, gamma- and delta-HCH, respectively Environmental water samples were analyzed with recovery between 86 4% and 102 4% for farm-field water, and between 92.2% and 98.6% for river water. The proposed method proved to serve as a simple, rapid, sensitive, inexpensive, and eco-friendly procedure for the determination of HCHs in aqueous samples. (C) 2010 Elsevier B V. All rights reserved.
URI: http://hdl.handle.net/11455/35056
ISSN: 0021-9673
文章連結: http://dx.doi.org/10.1016/j.chroma.2010.01.076
顯示於類別:化學系所

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