| 天然气中稀有气体同位素的分析技术 |
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| 引用本文： | 孙明良.天然气中稀有气体同位素的分析技术[J].沉积学报,2001,19(2):271-272. |
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| 作者姓名： | 孙明良 |
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| 作者单位： | 中国科学院兰州地质研究所气体地球化学国家重点实验室 兰州 730000 |
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| 摘 要： | 在天然气稀有气体同位素分析技术方面,目前国内存在着主机辅助设备不足和检测项目较少等急需解决的问题,为此,本文建立了高真空、低漏率和低本底的天然气进样系统,成功地解决了实验室分析过程中空气Ar对天然气样品Ar的污染,获得了天然气中40 Ar/ 36Ar的准确值,新测比值较国内外已发表的40 Ar/ 36Ar值普遍高,二者差值的大小与天然气中Ar的含量密切相关。同时,应用自制的液氮调温冷阱实现了Ar与Kr+Xe的粗分离和天然气Kr与Xe同位素组成的检测.
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| 关 键 词： | 天然气 稀有气体同位素 分析技术 |
| 文章编号： | 1000-0550(2001)02-0271-05 |
| 收稿时间： | 2000-09-25 |
| 修稿时间： | 2000年9月25日 |
Measurement Technology of Noble Gas Isotopes in Natural Gases |
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| SUN Ming-liang.Measurement Technology of Noble Gas Isotopes in Natural Gases[J].Acta Sedimentologica Sinica,2001,19(2):271-272. |
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| Authors: | SUN Ming-liang |
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| Institution: | State Key Laboratory of Gas Geochemistry,Lanzhou Institute of Geology,Chinese Academy of Sciences, Lanzhou 730000 |
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| Abstract: | A high vacuum purification line with lower leakage and lower background level had been established. The contamination of atmospheric argon to the samples was eliminated. The author determined the 40 Ar/ 36 Ar ratios of the samples analyzed previously using new method. Precise 40 Ar/ 36 Ar ratio is obtained by this system. The 40 Ar/ 36 Ar ratio observed by the new method is significantly higher than the previously determined ones, and the discrepancy was related to the Ar content of nature gas. Separating Ar from Kr and Xe is basically successful by temperature modulated cold finger, Kr and Xe isotopic compositions then can be measured. |
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| Keywords: | natural gas noble gas isotope analyzing technology |
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