An Improved Sampling Method for Measurement of Trace Hydrogen Isotopic Composition by MAT 253 Gas Isotope Mass Spectrometer

MENG Qing-qiang; JIN Zhi-jun; LIU Wen-hui; TAO Cheng; BA Li-qiang; YANG Hua-min

Rock and Mineral Analysis > 2010 > 29(6): 639-642.

MENG Qing-qiang, JIN Zhi-jun, LIU Wen-hui, TAO Cheng, BA Li-qiang, YANG Hua-min. An Improved Sampling Method for Measurement of Trace Hydrogen Isotopic Composition by MAT 253 Gas Isotope Mass Spectrometer[J]. Rock and Mineral Analysis, 2010, 29(6): 639-642.

Citation:

PDF (1095 KB)

An Improved Sampling Method for Measurement of Trace Hydrogen Isotopic Composition by MAT 253 Gas Isotope Mass Spectrometer

1.
Department of Hydrocarbon Exploration, Institute of Petroleum Exploration and Development, China Petroleum & Chemical Corporation, Beijing 100083, China
2.
College of Energy Resource, China University of Geosciences, Beijing 100083, China
3.
Department of Hydrocarbon Exploration, Institute of Petroleum Exploration and Development, China Petroleum & Chemical Corporation, Beijing 100083, China
4.
Department of Hydrocarbon Exploration, Institute of Petroleum Exploration and Development, China Petroleum & Chemical Corporation, Beijing 100083, China
5.
Wuxi Institute of Petroleum Geology, Institute of Petroleum Exploration and Development, China Petroleum & Chemical Corporation, Wuxi 214151, China
6.
Wuxi Institute of Petroleum Geology, Institute of Petroleum Exploration and Development, China Petroleum & Chemical Corporation, Wuxi 214151, China
7.
Wuxi Institute of Petroleum Geology, Institute of Petroleum Exploration and Development, China Petroleum & Chemical Corporation, Wuxi 214151, China
8.
Wuxi Institute of Petroleum Geology, Institute of Petroleum Exploration and Development, China Petroleum & Chemical Corporation, Wuxi 214151, China

More Information

Received Date: February 06, 2010
Revised Date: August 12, 2010

Abstract

ABSTRACT

The trace hydrogen in the natural gas from the mantle-derived fluid areas is the best specimen to reveal the isotopic composition characters of mantle-derived fluids. Restricted by the present measurement methods, the detection limit of hydrogen for accurate measurements of hydrogen isotopic composition should be further improved. It was proved that the measurement error of hydrogen isotopes was relatively larger and reliability of the measurement results deteriorated when the hydrogen content was lower than 1.5%, which may relate to the random fractionation of hydrogen isotopes around the inlet needle when it was sampled by the carrier gas. In order to avoid this random fractionation, an improved pressure sampling method was brought out, that is, increasing the pressure inside the sample container by pumping in salt-saturated water. The experiment results showed that by this sampling method the range and the standard deviation of the measured hydrogen isotope values declined with the increasing of the hydrogen content within 1% range and the absolute error was equivalent to that of the system error of MAT 253 instrument. Thus, this sampling method could effectively avoid the random fractionation of hydrogen isotopes during the sampling and improve the accuracy and reliability of the measurement results. It was also proved that the presently employed machine could be reasonably improved in order to enhance its function.
- trace,
- hydrogen,
- sampling

FullText(HTML)

References (20)

References

陶明信,徐永昌,韩文功,高波,马锦龙,王万春.中国东部幔源流体的活动特征与成藏效应[J].大地构造与成矿学,2001,25(3):265-270.

陶明信,徐永昌,史宝光,蒋中惕,沈平,李晓斌,孙明良.中国不同类型断裂带的地幔脱气与深部地质构造特征[J].中国科学:D辑,2005, 35 (5): 441-451.

徐永昌,沈平,孙明良,徐胜.我国东部非烃及稀有气体地球化学[J].中国科学:B辑,1990,20(6):645-651.

金之钧,杨雷,曾溅辉,张刘平.东营凹陷深部流体活动及其生烃效应初探[J].石油勘探与开发, 2002,29(2):42-44.

金之钧,张刘平,杨雷,胡文暄.沉积盆地深部流体的地球化学特征及油气成藏效应初探[J].地球科学,2002,27(6):659-665.

Jin Z J, Zhang L P, Yang L, Hu W X. A preliminary study of mantle-derived fluids and their effects on oil/gas generation in sedimentary basins [J]. Journal of Petroleum Science and Engineering, 2004,41:45-55.

杨雷.沉积盆地深部流体活动特征及加氢生烃效应 .北京:中国石油大学,2002.

曾溅辉,金之钧,张刘平.东营凹陷高青—平南断裂带幔源流体活动特征及其成藏效应[J].地质论评,2004,50(5):501-506.

Meng Q Q, Wu J F, Zhang L P. A study on the ore-forming effect of mantle-derived fluid[J]. Petroleum Science,2007,4(4):44-49.

刘国勇,张刘平,杨振平.天然气中氢气的地球化学特征及油气成藏效应[J].天然气工业, 2004,24(11):31-33.

Itsuro Kita, Sadao Matsuo, Hiroshi Wakita, Yasukazu Nakamura. D/H ratios of H₂ in soil gases and an indicator of fault movements[J]. Geochemical Journal, 1980,14:317-320.

Javoy M, Pineau F. The volatile record of "popping" rock from the Mid-Atlantic Ridge at 14°N: Chemical and isotopic composition of gas trapped in the vesicles[J]. Earth Planet Science Letter,1991,107:598-611.

Delany J R, Muenow D W, Graham D G. Abundance and distribution of water, carbon and sulfur in the glassy rims of submarine pillow basalts [J]. Geochim et Cosmochim Acta,1978,42:581-594.

上官志冠,霍卫国.腾冲热海地热区逸出H₂的δD_H₂值及其成因[J].科学通报,2001,46(15):1316-1320.

Shangguan Z G, Huo W G. δD values of escaped H₂ from hot springs at the Tengchong Rehai geothermal area and its origin[J]. Chinese Science Bulletin,2002,47(2):146-149.

上官志冠,白春华,孙明良.腾冲热海地区现代幔源岩浆气体释放特征[J].中国科学:D辑,2000,30(4):407-414.

上官志冠.腾冲火山区幔源岩浆气体上升过程中的变化及原因[J].地质论评,1999,45(增刊):926-933.

上官志冠,赵慈平,李恒忠,高清武,孙明良.腾冲热海火山地热区近期水热爆炸的阶段性演化特征[J].矿物岩石地球化学通报,2004,23(2):124-128.

Mark Henning, Dariusz Strapoc, Grzegorz P Lis, Peter Sauer, Jon Fong, Arndt Schimmelmann, Lisa M Pratt. Versatile inlet system for on-line compound-specific δD and δ¹³C gas chromatography-oxidation/reduction-isotope ratio mass spectrometry analysis of gaseous mixtures[J]. Rapid Communication s in Mass Spectrometry, 2007,21:2269-2272.

武汉大学.分析化学[M]. 4版.北京:高等教育出版社,2000:8-13.

Supplements (0)

Cited By