Use of GC-QMS for stable isotope analysis of environmentally relevant main and trace gases in the air
作者:
R. Russow,
H. Förstel,
期刊:
Isotopenpraxis Isotopes in Environmental and Health Studies
(Taylor Available online 1993)
卷期:
Volume 29,
issue 4
页码: 327-334
ISSN:0021-1915
年代: 1993
DOI:10.1080/00211919308046700
出版商: Taylor & Francis Group
关键词: air;analysis;carbon dioxide;environment;GC/MS;nitrogen 15;nitrogen oxides;tracer technique
数据来源: Taylor
摘要:
When tracing the fluxes of N compounds (especially N oxides) and carbon dioxide in the system soil-atmosphere and applying15N and13C, it is necessary to simultaneously determine both the concentration of the substances and their isotopic composition. GC separation (packed column) was coupled to a mass spectrometer by a special interface. Variable sample volumes can be delivered by changing the split by means of the interface in front of the MS. Thus, both the concentration of a gaseous compound and its15N content can be measured. Supplying sample volumes in a range between 5 μl and 5 ml, it is possible to measure both components of high content (e.g., nitrogen) and at the lower ppm(v)-content (e.g., dinitrogen oxide) in the air. Measurements of N2, N2O, NO and CO2are demonstrated, too.
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