Determination of intermolecular and intramolecular isotopic compositions of low-abundance gaseous hydrocarbons using an online hydrocarbon gas concentration method
文献类型：期刊论文
| 作者 | Liu, Wen1,2,3; Li, Yun1,3 ; Jiang, Wenmin1,3; Xiong, Yongqiang1,3
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| 刊名 | JOURNAL OF CHROMATOGRAPHY A
 |
| 出版日期 | 2023-09-13 |
| 卷号 | 1706页码:5 |
| 关键词 | Natural gas Low-abundance gaseous hydrocarbons Compound-specific isotopic analyses Position-specific isotopic analyses Online concentration system |
| ISSN号 | 0021-9673 |
| DOI | 10.1016/j.chroma.2023.464250 |
| 英文摘要 | The stable isotopic composition of natural gas can be used to identify its origin and source. However, low concentrations of gaseous hydrocarbons in high-mature natural and shale gases hinder accurate determination of their compound-and position-specific isotopic compositions. In this study, an online C2+ hydrocarbon gas concentration system combined with gas chromatography-isotope ratio mass spectrometry (GC-IRMS) or gas chromatography-pyrolysis-gas chromatography-isotope ratio mass spectrometry (GC-Py-GC-IRMS) was developed to determine compound-and position-specific isotopic compositions of low-abundance gaseous hydrocarbons. The lower limit of the gas concentration required for isotope ratio determination using the online concentration system is 0.001% (0.003%) for compound-specific carbon (hydrogen) isotopes and 0.005% for position-specific carbon isotopes and is thus applicable to most natural gas samples. The online concentration technique does not cause significant isotopic fractionation effects, and the combination with GC-IRMS and GC-Py-GC-IRMS can accurately and precisely determine the compound-specific 813C and 8D values of low content C2+ gaseous hydrocarbons and the position-specific 813C values (813Ca, 813Cb, and SP values) of propane in low-content propane samples, respectively. The application of our method to two natural gas samples from the Ordos and Sichuan basins further confirms that the online concentration method allows simple and rapid determination of the compound-and position-specific isotopic compositions of low-abundance gaseous hydrocarbons. |
| WOS研究方向 | Biochemistry & Molecular Biology ; Chemistry |
| 语种 | 英语 |
| WOS记录号 | WOS:001051530700001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/74698]  |
| 专题 | 有机地球化学国家重点实验室 |
| 通讯作者 | Li, Yun; Jiang, Wenmin |
| 作者单位 | 1.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Organ Geochem, Guangzhou 510640, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.CAS Ctr Excellence Deep Earth Sci, Guangzhou 510640, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Wen,Li, Yun,Jiang, Wenmin,et al. Determination of intermolecular and intramolecular isotopic compositions of low-abundance gaseous hydrocarbons using an online hydrocarbon gas concentration method[J]. JOURNAL OF CHROMATOGRAPHY A,2023,1706:5. |
| APA | Liu, Wen,Li, Yun,Jiang, Wenmin,&Xiong, Yongqiang.(2023).Determination of intermolecular and intramolecular isotopic compositions of low-abundance gaseous hydrocarbons using an online hydrocarbon gas concentration method.JOURNAL OF CHROMATOGRAPHY A,1706,5. |
| MLA | Liu, Wen,et al."Determination of intermolecular and intramolecular isotopic compositions of low-abundance gaseous hydrocarbons using an online hydrocarbon gas concentration method".JOURNAL OF CHROMATOGRAPHY A 1706(2023):5. |
入库方式： OAI收割
来源：广州地球化学研究所
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