Citation: HAN Xiao-Xiao, LI Jin-Xu, JIANG Ji-Chun, WU Chen-Xin, CHEN Ping, ZHANG Zhi-Ping, HOU Ke-Yong, LI Hai-Yang. Rapid Detection of Trace Volatile Organic Compounds By Electric Driven Cryo-Trap Movable Mass Spectrometer[J]. Chinese Journal of Analytical Chemistry, ;2018, 46(5): 642-649. doi: 10.11895/j.issn.0253-3820.171459 shu

Rapid Detection of Trace Volatile Organic Compounds By Electric Driven Cryo-Trap Movable Mass Spectrometer

¹ The College of Chemistry & Chemical Engineering of Xi'an Shiyou University, Xi'an 710065, China;
² Key Laboratory of Separation Science for Analytical Chemistry of Chinese Academy of Sciences, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China

Received Date: 28 November 2017
Revised Date: 9 March 2018

Fund Project: This work was supported by the National Natural Science Foundation of China (Nos. 21375129, 21675155) and the National High Technology Research and Development Program of China (No. 2014AA06A507).

An electric driven cryo-trap enrichment apparatus for the movable mass spectrometer was designed to realize rapid and automatic detection of trace volatile organic compounds (VOCs) in the atmosphere. Compared with traditional cryo-trap with refrigerant, the lowest temperature of cryocooler was down to -196℃, and it was easy to carry due to its small size, light weight and refrigerant-free. Cryo-trap combined with time-of-flight mass spectrometer was used to analyze benzene, toluene and xylene, and the result showed that the signal strength of benzene, toluene and xylene, with the cryo-trap enrichment, was improved by 212-fold, 254-fold and 242-fold, and the recoveries reached 98%, 87% and 87%, respectively. The analytical time for single sample was only 14 min. The electric driven cryo-trap combined with on-line mass spectrometer was used to detect 39 kinds of VOCs listed in TO-14 method of EPA and ambient air, and the sensitivity of the newly designed instrument was better than the threshold of national indoor VOCs. The combination of electric driven cryo-trap and time-of-flight mass spectrometer could be used for rapid enrichment and monitoring of trace VOCs in the atmosphere and indoor air, showing great potential in in-site measurement and real-time monitoring of volatile organic pollutants.
- Volatile organic compounds,
- Cryo-trap enrichment,
- Movable mass spectrometer,
- Trace determination
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