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题名: A Cryogen-free Refrigerating Prconcentration/Thermal Desorption Instrument for On-line Determination of Volatile Organic Compounds in Ambient Air
作者: Peng Hong1, 2;  Chen Shi-Heng1, 2;  Li Wei-Wei1, 2;  Wu Da-Peng1;  Guan Ya-Feng1
关键词: Volatile organic compounds ;  Sorbent trapping ;  Thermal desorption ;  On-line determination
刊名: CHINESE JOURNAL OF ANALYTICAL CHEMISTRY
发表日期: 2011-10-01
DOI: 10.3724/SP.J.1096.2011.01482
卷: 39, 期:10, 页:1482-1486
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Analytical
研究领域[WOS]: Chemistry
英文摘要: A cryogen-free refrigerating preconcentration/thermal desorption device that used a refrigeration compressor as cold source has been developed, optimized and characterized. Only -10 degrees C was needed to trap volatile organic compounds (VOCs) down to C2 in ambient air. The device was applied for the on-line determination of VOCs in ambient air. Carbon molecular sieves TDX-01 and graphitized carbon black were used as adsorbents for enrichment of VOCs at -10 degrees C. The trapped analytes were thermally desorbed, and were directly transferred into the gas chromatography for analysis without any second cryotrap or secondary condensation. Experimental results showed that the relative standard deviations were -less than 5%, the correlation coefficients were more than 0. 99, and the detection limits ranged from 14 X 10(-12) - 52 X 10(-12) (V/V) for 10 volatile organic compounds being tested. Compared with the traditional thermal desorption units that use liquid nitrogen or thermoelectric coolers as cold sources, device is more applicable for the rapid analysis of trace VOCs in air with merits of compactness, small size and low power consumption.
关键词[WOS]: WORKPLACE AIR ;  HYDROCARBONS ;  ATMOSPHERE
语种: 英语
WOS记录号: WOS:000298456000005
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/142453
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, Key Lab Separat Sci Analyt Chem, Dept Instrumentat & Analyt Chem, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China

Recommended Citation:
Peng Hong,Chen Shi-Heng,Li Wei-Wei,et al. A Cryogen-free Refrigerating Prconcentration/Thermal Desorption Instrument for On-line Determination of Volatile Organic Compounds in Ambient Air[J]. CHINESE JOURNAL OF ANALYTICAL CHEMISTRY,2011,39(10):1482-1486.
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