NDLI: Comparison of geochemical parameters derived from comprehensive two-dimensional gas chromatography with time-of-flight mass spectrometry and conventional gas chromatography-mass spectrometry

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Comparison of geochemical parameters derived from comprehensive two-dimensional gas chromatography with time-of-flight mass spectrometry and conventional gas chromatography-mass spectrometry

Content Provider	Springer Nature Link
Author	Wang, HuiTong Weng, Na Zhang, ShuiChang Zhu, GuangYou Wei, CaiYun
Copyright Year	2011
Abstract	The saturated and aromatic hydrocarbon fractions of crude oil samples have been analyzed by using comprehensive two-dimensional gas chromatography with time-of-flight mass spectrometry (GC×GC-TOFMS) and conventional gas chromatography-mass spectrometry (GC-MS). In order to investigate the consistency and discrepancy of the obtained data from the two instruments, some petroleum geochemical parameters have been compared. A comparison of 23 geochemical parameters indicates that 10 parameters are comparable from the two instruments with less than 5% deviations. Therefore, GC×GC-TOFMS is equivalent to conventional GC-MS in some geochemical parameter acquisitions. However, the other 13 parameters are discrepant, including gammacerane / αβ-hopane, Ts/Tm, 2-ethyl-naphthalene / 1-ethyl-naphthalene (ENR), (2, 6-dimethyl-naphthalene +2,7-dimethyl-naphthalene) / 1,5-dimethyl-naphthalene (DNR), etc. Furthermore, compared to GC×GC-TOFMS, some low concentration compounds could not be detected by the conventional GC-MS, which results in the missing of related geochemical data. Normally, this is caused by the limited separation power and peak capacity of the conventional GC column. Besides, the co-eluting peak integrations are also affected significantly due to the incomplete separation of the compounds. Some low concentration compounds might not be detected because of the interference from the baseline noise or from other substances. GC×GC-TOFMS prevails in compound separation against the conventional GC-MS by avoiding co-elution, which achieves more accurate and precise peak area measurement with the presence of a true baseline. So petroleum geochemical parameters obtained from the GC×GC-TOFMS are more reliable than those from the conventional GC-MS. GC×GC-TOFMS may become one of the most effective analytical tools for the oil and gas geochemical study.
Starting Page	1892
Ending Page	1901
Page Count	10
File Format	PDF
ISSN	16747313
Journal	Science in China Series D: Earth Sciences
Volume Number	54
Issue Number	12
e-ISSN	18691897
Language	English
Publisher	SP Science China Press
Publisher Date	2011-12-08
Publisher Place	Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	comprehensive two-dimensional gas chromatography time-of-flight mass spectrometry gas chromatography-mass spectrometry geochemical parameters Earth Sciences
Content Type	Text
Resource Type	Article
Subject	Earth and Planetary Sciences

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