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学科主题: 物理化学
题名: A cryogen-free refrigerating preconcentration device for the measurement of C2 to C4 hydrocarbons in ambient air
作者: Peng, Hong1, 2;  Wang, JianWei1;  Shen, Zheng1;  Wu, Dapeng1;  Guan, Yafeng1
通讯作者: 关亚风
刊名: ANALYST
发表日期: 2011
DOI: 10.1039/c0an00563k
卷: 136, 期:3, 页:586-590
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 ;  Physical Sciences
类目[WOS]: Chemistry, Analytical
摘要: A cryogen-free refrigerating preconcentration device for the measurement of C2 to C4 hydrocarbons in ambient air
研究领域[WOS]: Chemistry
英文摘要: A cryogen-free refrigerating preconcentration device for the enrichment of trace amounts of highly volatile organic compounds in the atmosphere prior to analysis has been designed and evaluated. The device consists of a microtrap housed in an insulated box, which is cooled by a conventional refrigeration unit. Experimental parameters, including adsorbent mass, trapping temperature, and thermal desorption temperature, were optimized. The on-line coupling of the device to a GC allows sufficient enrichment and separation of C2 to C4 hydrocarbons in less than 40 min without a second cryotrap. The target compounds analysis showed good linearity (correlation coefficients >0.99) and repeatability (relative standard deviation <5%). Detection limits for the 10 volatile organic compounds ranged from 14 ppt to 52 ppt, under the conditions of a 500 mL sampling volume and -10 degrees C trapping temperature. Real air sample measurements were conducted at an urban site, and five VOCs including ethane, ethene, propane, propene and 1-butene were detected and quantified.
关键词[WOS]: VOLATILE ORGANIC-COMPOUNDS ;  CHROMATOGRAPHY-MASS SPECTROMETRY ;  AUTOMATED GAS-CHROMATOGRAPH ;  THERMAL-DESORPTION ;  NONMETHANE HYDROCARBONS ;  ADSORBENT MATERIALS ;  OZONE PRECURSORS ;  QUALITY-CONTROL ;  URBAN ;  SYSTEM
语种: 英语
WOS记录号: WOS:000286326800025
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/115447
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, Dept Instrumentat & Analyt Chem, Key Lab Separat Sci Analyt Chem CAS, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, Grad Sch, Beijing 100039, Peoples R China

Recommended Citation:
Peng, Hong,Wang, JianWei,Shen, Zheng,et al. A cryogen-free refrigerating preconcentration device for the measurement of C2 to C4 hydrocarbons in ambient air[J]. ANALYST,2011,136(3):586-590.
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