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题名: Temperature-controlled headspace liquid-phase microextraction device using volatile solvents
作者: Chen, Shiheng1, 2;  Peng, Hong1;  Wu, Dapeng1;  Guan, Yafeng1
通讯作者: 关亚风
关键词: Temperature-controlled headspace liquid-phase microextraction ;  (TC-HS-LPME) ;  Headspace liquid-phase extraction ;  Thermoelectric cooler (TEC) ;  Chlorobenzenes ;  Large volume injection
刊名: JOURNAL OF CHROMATOGRAPHY A
发表日期: 2010-09-17
DOI: 10.1016/j.chroma.2010.07.033
卷: 1217, 期:38, 页:5883-5889
收录类别: SCI
文章类型: Article
部门归属: 1
项目归属: 105
产权排名: 1;1
WOS标题词: Science & Technology ;  Life Sciences & Biomedicine ;  Physical Sciences
类目[WOS]: Biochemical Research Methods ;  Chemistry, Analytical
研究领域[WOS]: Biochemistry & Molecular Biology ;  Chemistry
英文摘要: A novel temperature-controlled headspace liquid-phase microextraction (TC-HS-LPME) device was established in which volatile solvents could be used as extractant. In this device, a PTFE vial cap with a cylindrical cavity was used as the holder of the extraction solvent. Up to 40 mu l of extraction solvent could be suspended in the cavity over the headspace of aqueous sample in the vial. A cooling system based on thermoelectric cooler (TEC) was used to lower the temperature of extractant in PTFE vial cap to reduce the loss of volatile solvent during extraction process and increase the extraction efficiency. The selection of solvents for HS-LPME was then extended to volatile solvents, such as dichloromethane, ethyl acetate and acetone. The use of volatile extraction solvents instead of semi-volatile solvent reduced the interference of the large solvent peak to the analytes peaks, and enhanced the compatibility of HS-LPME with gas chromatograph (GC). Moreover, the use of larger volume of extractant solvent increases the extraction capacity and the injection volume of GC after extraction, thus improving detection limits. Several critical parameters of this technique were investigated by using chlorobenzenes (CBs) as the model analytes. High enrichment factors (498-915), low limits of detection (0.004-0.008 mu g/L) and precision (3.93-5.27%) were obtained by using TC-HS-LPME/GC-FID. Relative recoveries for real samples were more than 83%. (C) 2010 Elsevier BM. All rights reserved.
关键词[WOS]: SINGLE-DROP MICROEXTRACTION ;  ELECTRON CAPTURE DETECTION ;  GAS-CHROMATOGRAPHY ;  WATER SAMPLES ;  AQUEOUS SAMPLES ;  ORGANOCHLORINE PESTICIDES ;  NITROAROMATIC EXPLOSIVES ;  CHLOROBENZENES ;  FIBER ;  CHLOROPHENOLS
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000281921200002
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/103407
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Dept Instrumentat & Analyt Chem, Key Lab Separat Sci Analyt Chem,CAS, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, Grad Sch, Beijing 100039, Peoples R China

Recommended Citation:
Chen, Shiheng,Peng, Hong,Wu, Dapeng,et al. Temperature-controlled headspace liquid-phase microextraction device using volatile solvents[J]. JOURNAL OF CHROMATOGRAPHY A,2010,1217(38):5883-5889.
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