GeoVOC: A SIFT-MS method for the analysis of small linear hydrocarbons of relevance to oil exploration
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- 作者：Gregory J. Francis ; Paul F. Wilson ; Daniel B. Milligan ; Vaughan S. Langford ; Murray J. McEwan
- 关键词：Selected ion flow tube ; Hydrocarbon ; Ion– ; molecule ; Oil prospecting
- 刊名：International Journal of Mass Spectrometry
- 出版年：2007
- 出版时间：15 November 2007
- 年：2007
- 卷：268
- 期：1
- 页码：38-46
- 全文大小：400 K
文摘
The rate coefficients of the ion–molecule reactions between O2![]()
+, H3O+, and a range of linear saturated hydrocarbons, and between common hydrocarbon product ions from these reactions and water were determined using a flowing afterglow selected ion flow tube mass spectrometer. Using these data, the selected ion flow tube-mass spectrometry (SIFT-MS) technique was applied to the real-time measurement of linear saturated hydrocarbons in dry and moist headspace samples without sample preparation. Using a Voice100 SIFT-MS instrument the Geochemical VOC method (GeoVOC) has been assessed against calibrated standards and found to give an experimental RMS precision to within 2 % for dry and 6 % for humid hydrocarbon samples in the ppm range. The application of SIFT-MS and development of the GeoVOC method offers a fast convenient means of assessment of hydrocarbon seeps.