Determination of ultra-trace amount of halo-hydrocarbon in nitrogen by atmospheric pressure ionization mass spectrometry

被引:0
|
作者
Bi, Zhe [1 ]
Zhou, Zeyi [1 ]
Liu, Zixuan [2 ]
Ma, Shuli [1 ]
Ma, Haomiao [1 ]
Wang, Zhen [1 ]
Huang, Peng [1 ]
Wang, Man [1 ]
机构
[1] Natl Inst Metrol, 18 Bei San Huan Dong Lu, Beijing 100029, Peoples R China
[2] Beijing Ctr Phys & Chem Anal, Beijing 100089, Peoples R China
关键词
R134a; standard gas mixture; atmospheric pressure ionization; electron impact ionization;
D O I
暂无
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
The monitoring of halo hydrocarbons such as R134a in atmosphere has attract great attention due to its strong global warming effect. In this study, on-line atmospheric pressure ionization (API) and electron impact ionization (EI) mass spectroscopy was used to measure R134a at ambient level (ppt, 10(-12) mol/mol). A dilution system was developed to test the linearity of API/EI MS. Results showed that the sensitivity of API MS was much higher than that of EI MS. A good linearity could be obtained at the range of 10-75 ppt for API MS. The API MS could directly measure R134a at ambient level without preconcentration devices.
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页码:1506 / 1509
页数:4
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