Simultaneous determination of compound‐specific isotopic compositions of acyclic isoprenoids and n ‐alkanes in light crude oil
| Autor: | Yankuan Tian, Zhao-Wen Zhan, Shuang Yu |
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| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Journal of Separation Science. 44:3594-3599 |
| ISSN: | 1615-9314 1615-9306 |
| Popis: | Stable carbon and hydrogen isotope ratios of individual n-alkanes and acyclic isoprenoids are important tools in petroleum geochemistry. However, the analysis requires baseline separation and peak profiles using gas chromatography-isotope ratio mass spectrometry to obtain accurate compound-specific isotope data. Time-consuming isolation or purification is typically conducted to separate the compounds to avoid co-elution with other compounds or matrices in crude oils. We developed a simple gas chromatography separation method to simultaneously measure the compound-specific carbon or hydrogen isotope compositions of n-alkanes and acyclic isoprenoids. It was achieved by direct injection of the whole crude condensate and light oil or the saturated fractions of different types of crude oils using a 60 m DB-17ms column. This method simplifies the pre-treatment of compound-specific isotope analysis, saves manpower and time, and reduces the use of organic solvents to be more environmentally friendly. |
| Databáze: | OpenAIRE |
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