Rapid Detection of Trace Volatile Organic Compounds By Electric Driven Cryo-Trap Movable Mass Spectrometer
10.11895/j.issn.0253-3820.171459
- VernacularTitle:电冷阱富集-光电离移动质谱快速检测痕量挥发性有机物
- Author:
Xiao-Xiao HAN
1
;
Jin-Xu LI
;
Ji-Chun JIANG
;
Chen-Xin WU
;
Ping CHEN
;
Zhi-Ping ZHANG
;
Ke-Yong HOU
;
Hai-Yang LI
Author Information
1. 西安石油大学化学化工学院
- Keywords:
Volatile organic compounds;
Cryo-trap enrichment;
Movable mass spectrometer;
Trace determination
- From:
Chinese Journal of Analytical Chemistry
2018;46(5):642-649
- CountryChina
- Language:Chinese
-
Abstract:
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.
