| 气相色谱-同位素比值质谱法测定天然气水合物气体单体碳氢同位素 |
| |
| 引用本文： | 贺行良,刘昌岭,王江涛,张媛媛,孟庆国.气相色谱-同位素比值质谱法测定天然气水合物气体单体碳氢同位素[J].岩矿测试,2012,31(1):154-158. |
| |
| 作者姓名： | 贺行良 刘昌岭 王江涛 张媛媛 孟庆国 |
| |
| 作者单位： | 国土资源部海洋油气资源与环境地质重点实验室, 山东 青岛 266071;青岛海洋地质研究所, 山东 青岛 266071;中国海洋大学海洋化学理论与工程技术教育部重点实验室, 山东 青岛 266100;国土资源部海洋油气资源与环境地质重点实验室, 山东 青岛 266071;青岛海洋地质研究所, 山东 青岛 266071;中国海洋大学海洋化学理论与工程技术教育部重点实验室, 山东 青岛 266100;国土资源部海洋油气资源与环境地质重点实验室, 山东 青岛 266071;青岛海洋地质研究所, 山东 青岛 266071;国土资源部海洋油气资源与环境地质重点实验室, 山东 青岛 266071;青岛海洋地质研究所, 山东 青岛 266071 |
| |
| 基金项目： | 国家自然科学基金项目(41072037); 国土资源部公益性行业科研专项(201111026) |
| |
| 摘 要： | 天然气水合物气体同位素组成数据是其气体成因、运移与积聚过程研究的重要参数。目前天然气水合物气体单体碳、氢同位素仪器分析技术主要借鉴天然气的分析方法,但对水合物气的分解、收集、储存等前处理技术缺乏系统研究。本文利用气相色谱-同位素比值质谱(GC-IRMS)技术,对比研究了顶空法、注射器法和排水法等水合物气体分解与收集方法的实用性,以及铝塑气袋和丁基橡胶塞密封的玻璃顶空瓶对分解气的储存效果。实验结果表明:在丁基橡胶塞密封的玻璃顶空瓶内真空分解且原位储存是水合物气体单体碳、氢同位素分析的最佳前处理方法。方法标准偏差为0.12‰～0.23‰δ13C-(C1-C3,CO2)]、1.0‰～1.8‰δD-(C1-C3)];相对标准偏差(RSD,n=6)为0.38%～0.86%δ13C-(C1-C3,CO2)]、0.62%～1.00%δD-(C1-C3)]。通过对南海神狐海域、祁连山冻土区、人工合成水合物样品的分析测定,表明该方法简便实用、适用范围宽,可满足天然气水合物气体单体碳、氢同位素的分析要求。
|
| 关 键 词： | 天然气水合物气体 碳氢同位素 气相色谱-同位素比值质谱法 |
| 收稿时间： | 2011/11/19 0:00:00 |
Measurement of Carbon and Hydrogen Isotopes of Natural Gas Hydrate-Bound Gases by Gas Chromatography-Isotope Ratio Mass Spectrometry |
| |
| HE Xing-liang,LIU Chang-ling,WANG Jiang-tao,ZHANG Yuan-yuan and MENG Qing-guo.Measurement of Carbon and Hydrogen Isotopes of Natural Gas Hydrate-Bound Gases by Gas Chromatography-Isotope Ratio Mass Spectrometry[J].Rock and Mineral Analysis,2012,31(1):154-158. |
| |
| Authors: | HE Xing-liang LIU Chang-ling WANG Jiang-tao ZHANG Yuan-yuan and MENG Qing-guo |
| |
| Institution: | Key Laboratory of Marine Hydrocarbon Resources and Environmental Geology, Ministry of Land and Resources, Qingdao 266071, China;Qingdao Institute of Marine Geology, Qingdao 266071, China;Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China;Key Laboratory of Marine Hydrocarbon Resources and Environmental Geology, Ministry of Land and Resources, Qingdao 266071, China;Qingdao Institute of Marine Geology, Qingdao 266071, China;Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China;Key Laboratory of Marine Hydrocarbon Resources and Environmental Geology, Ministry of Land and Resources, Qingdao 266071, China;Qingdao Institute of Marine Geology, Qingdao 266071, China;Key Laboratory of Marine Hydrocarbon Resources and Environmental Geology, Ministry of Land and Resources, Qingdao 266071, China;Qingdao Institute of Marine Geology, Qingdao 266071, China |
| |
| Abstract: | The isotopic compositions of natural gas hydrate-bound gases can provide valuable information about the origin,migration and accumulation process of the gases.At present,the instrumental analysis methods for carbon and hydrogen isotope of natural gas hydrate-bound gases mainly refer to that for the natural gases.However,there is a lack of comprehensive studies on the influences of preparation technologies such as decomposition,collection and storage.In this paper,a Gas Chromatography-Isotope Ratio Mass Spectrometry(GC-IRMS) method was established for the measurement of carbon and hydrogen isotope of natural gas hydrate-bound gases(C1-C3,CO2).The practical applicability of different gas decomposition and collection methods(i.e.headspace,syring and drainage),and the storage effect of different decomposed gases′ storage vessels(i.e.aluminum air bag,glass bottle with butyl rubber plug) were comparatively studied.The results indicate that the best preparation methods are vacuum headspace-decomposition and in situ storage.Good precision of δ13C-(C1-C3,CO2) and δD-(C1-C3) is in the range of 0.12‰-0.23‰ and 1.0‰-1.8‰ with relative standard deviations(RSD,n=6) of 0.38%-0.86% and 0.62%-1.00%,respectively.The method was successfully applied in the determination of gas isotopic compositions of natural gas hydrate-bound gases from the South China Sea,Qilian Mountain Permafrost and laboratory synthetic samples.This method is easy to operate,can be applied widely,and is suitable for the determination of isotopic compositions of hydrate-bound gases. |
| |
| Keywords: | natural gas hydrate-bound gas carbon and hydrogen isotopes gas chromatography-isotope ratio mass spectrometry |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《岩矿测试》浏览原始摘要信息 |
| 点击此处可从《岩矿测试》下载免费的PDF全文 |
|
