采用氧化物方式高精度测量微量样品钕同位素比值

李潮峰; 陈福坤; 王芳

Volume 33 Issue 2

Mar. 2008

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Article Navigation > Earth Science > 2008 > 33(2): 243-250

LI Chao-feng, CHEN Fu-kun, WANG Fang, 2008. Precise Measurement of Nd Isotopic Ratio of Micro-Samples Using NdO+ Method. Earth Science, 33(2): 243-250.

Citation:

LI Chao-feng, CHEN Fu-kun, WANG Fang, 2008. Precise Measurement of Nd Isotopic Ratio of Micro-Samples Using NdO⁺ Method. Earth Science, 33(2): 243-250.

LI Chao-feng, CHEN Fu-kun, WANG Fang, 2008. Precise Measurement of Nd Isotopic Ratio of Micro-Samples Using NdO+ Method. Earth Science, 33(2): 243-250.

Citation:

LI Chao-feng, CHEN Fu-kun, WANG Fang, 2008. Precise Measurement of Nd Isotopic Ratio of Micro-Samples Using NdO⁺ Method. Earth Science, 33(2): 243-250.

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Precise Measurement of Nd Isotopic Ratio of Micro-Samples Using NdO⁺ Method

LI Chao-feng^{1, 2
,},
CHEN Fu-kun¹,
WANG Fang^{1, 2}

1.
Laboratory for Radiogenic Isotope Geochemistry, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China
2.
School of Earth Sciences, Graduate school of Chinese Academy of Sciences, Beijing 100039, China

Received Date: 2007-06-08
Publish Date: 2008-03-25

Abstract

Abstract

Precise measurement of Nd isotopic ratio of micro-samples, being one of the most difficult tasks in measurements of isotopic ratios, plays an important role in research fields of earth and environmental sciences.This study reports the results of precise measurements of Nd isotopic ratios on the solutions of international standard material using less 1 ng samples.Applying the Nd⁺ and NdO⁺ measurement methods, solutions of the standard material (Ames, JMC, and Jndi-1) and the laboratory-own reference material (LRIG-Nd), which contain ≥200 ng to 0.25 ng Nd samples, were measured by a new thermal ionization mass spectrometer (IsoProbe-T).Data acquisition during the isotopic measurement was done by using a static mode with a multiple-receiver configuration.Internal and external precisions obtained for all the measurements of ¹⁴³Nd/¹⁴⁴Nd ratio were better than 0.003%.Compared with the Nd⁺ method, Nd isotopic measurement using the NdO⁺ method distinguishably displays an advantage in high sensibility of measurement, being about 100 times higher than that by using the Nd⁺ method.
- micro-sample,
- Nd isotope,
- oxide,
- correction of oxygen interference

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致谢: 本研究工作得到科技部国家重点基础研究发展计划(No.2006CB403505) 和国家自然科学基金委员会(No.40525007) 的资助.感谢肖平和李向辉在实验分析过程的帮助.

References(29)

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