高精度质谱计在同位素地球化学的应用前景

陈福坤; 李秋立; 李潮峰; 李向辉; 王秀丽; 王芳

Volume 30 Issue 6

Jun. 2005

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Article Navigation > Earth Science > 2005 > 30(6): 639-645

CHEN Fu-kun, LI Qiu-li, LI Chao-feng, LI Xiang-hui, WANG Xiu-li, WANG Fang, 2005. Prospect of High Precision Mass Spectrometer in Isotope Geochemistry. Earth Science, 30(6): 639-645.

Citation:

CHEN Fu-kun, LI Qiu-li, LI Chao-feng, LI Xiang-hui, WANG Xiu-li, WANG Fang, 2005. Prospect of High Precision Mass Spectrometer in Isotope Geochemistry. Earth Science, 30(6): 639-645.

CHEN Fu-kun, LI Qiu-li, LI Chao-feng, LI Xiang-hui, WANG Xiu-li, WANG Fang, 2005. Prospect of High Precision Mass Spectrometer in Isotope Geochemistry. Earth Science, 30(6): 639-645.

Citation:

CHEN Fu-kun, LI Qiu-li, LI Chao-feng, LI Xiang-hui, WANG Xiu-li, WANG Fang, 2005. Prospect of High Precision Mass Spectrometer in Isotope Geochemistry. Earth Science, 30(6): 639-645.

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Prospect of High Precision Mass Spectrometer in Isotope Geochemistry

Laboratory for Radiogenic Isotope Geochemistry, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China

Received Date: 2005-07-18
Publish Date: 2005-11-25

Abstract

Abstract

The high precision measurement of isotopic ratios for micro-geological samples has become very important in the geological and environmental sciences. Recently developed solid-source thermal ionization mass spectrometers are highly precise and sensitive, and are playing a crucial role in isotopic geochronology and geochemistry. This paper reports analytical data obtained from standard material solutions using an IsoProbe-T mass spectrometer. Measurements on the Sr standard material NBS987 and Nd standard material Ames yielded mean ⁸⁷Sr/⁸⁶Sr and ¹⁴³Nd/¹⁴⁴Nd ratio values of 0.710 241 8± 0.000 005 1 and 0.512 148 4±0.000 002 9, respectively, with an internal precision better than 0.000 3%. Measurements using a small amount of the Sr standard material solution NBS987 (0.3-1 ng) yielded an internal precision significantly better than 0.003%. Combining chemical separation procedures having low blank, measurements of micro-geological samples have successively been achieved. This combination of low-blank chemical procedures and the use of a high precision mass spectrometer will potently promote applications of single-grain geochronology and isotopic tracer on magmatic rocks, metamorphic rocks, ore deposits and tectonites.
- mass spectrometer,
- high precision,
- low blank,
- geochronology,
- isotope geochemistry

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References(25)

References

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