| A GC×GC-ToFMS Investigation of the Unresolved Complex Mixture
and Associated Biomarkers in Biodegraded Petroleum |
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| 作者姓名： | WANG Guangli Bernd Rolf Tatsuo SIMONEIT SHI Shengbao WANG Tieguan ZHONG Ningning WANG Peirong |
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| 作者单位： | 1 State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, 18 Fuxue Road, Beijing 102249, China
2 Laboratory for Marine Mineral Resources, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China
3 WA – Organic and Isotope Geochemistry Centre, Department of Chemistry, Curtin University, GPO Box U1987, Perth WA 6845, Australia,4 Department of Chemistry, College of Science, Oregon State University, Corvallis, OR 97331, U.S.A.,1 State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, 18 Fuxue Road, Beijing 102249, China,1 State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, 18 Fuxue Road, Beijing 102249, China,1 State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, 18 Fuxue Road, Beijing 102249, China and 1 State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, 18 Fuxue Road, Beijing 102249, China |
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| 摘 要： | Heavy biodegraded crude oils have larger numbers of coeluting compounds than non-biodegraded oils, and they are typically not resolved with conventional gas chromatography (GC). This unresolved complex mixture (UCM) has been investigated using comprehensive two- dimensional gas chromatography–time-of-flight mass spectrometry (GC×GC-ToFMS) within a set of biodegraded petroleums derived from distinct sedimentary basins, including northwestern Sichuan (Neoproterozoic, marine), Tarim (Early Paleozoic, marine), Bohai Bay (Eocene, saline/brackish) and Pearl River Mouth (Eocene, freshwater). In general, the hydrocarbons that constitute the UCM in petroleum saturate fractions can be classified into three catalogues based on the distributions of resolved compounds on two dimensional chromatograms. Group 1 is composed mainly of normal and branched alkanes, isoprenoid alkanes and monocyclic alkanes; Group 2 comprises primarily terpanes ranging from two to five rings, and Group 3 is dominated by monoaromatic hydrocarbons such as tetralins and monoaromatic steranes. In addition, the UCM is source dependent and varies between oil populations. i.e., the UCM of petroleum derived from Precambrian and Early Paleozoic marine, Eocene saline/brackish and freshwater source rocks is specifically rich in higher homologues of A-norsteranes, series of 1,1,3-trimethyl-2-alkylcyclohexanes (carotenoid-derived alkanes), and tetralin and indane compounds, respectively.
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| 关 键 词： | unresolved complex mixture (UCM) biomarker source biodegradation comprehensive two-dimensional gas chromatography–time-of-flight mass spectrometry (GC×GC-ToFMS) |
| 收稿时间： | 2018/1/27 0:00:00 |
| 修稿时间： | 2018/5/15 0:00:00 |
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