| 负热电离质谱技术在锇同位素测定中的应用 |
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| 引用本文： | 孙卫东 万家骏. 负热电离质谱技术在锇同位素测定中的应用[J]. 质谱学报, 1997, 18(2): 7-15 |
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| 作者姓名： | 孙卫东 万家骏 |
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| 作者单位： | 美国FinninganMAT质谱公司中国服务站!北京，100081，中国科学技术大学地球和空间科学系!合肥，230026，第三世界科学院地球科学和天文学高级研究中心!合肥，230026 |
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| 基金项目： | 国家自然科学基金!（49573173） |
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| 摘 要： | 本文用ＭＡＴ－２６２Ｗ质谱仪研究了负热电离质谱技术测定Ｏｓ同位素组成的一些技术问题，首次采用样品与氧化剂一起点样等方法，配合通氧气，显著地提高了电离效率，所获得的离子流强度明显高于文献值。
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| 关 键 词： | 锇同位素 负热电离质谱 N－TIMS |
Application of Negative Thermal Ionization Mass Spectromery in Os Isotope Determination |
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| Sun Weidong,Peng Zicheng,Wang Zhaorong,Zhang Xun. Application of Negative Thermal Ionization Mass Spectromery in Os Isotope Determination[J]. Journal of Chinese Mass Spectrometry Society, 1997, 18(2): 7-15 |
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| Authors: | Sun Weidong Peng Zicheng Wang Zhaorong Zhang Xun |
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| Abstract: | Techniques on the determination of isotopic abundance of osrnium using negative thermal ionization mass spectrometry (N-TIMS)are discussed in this paper. Improvement on the method,for an example,loading samples together with oxidizer is proved to be useful. These methods coupled with gas bleeding can improve the ionization efficiency significantly. The stable osmium isotopic composition obtained in this experiment is concordant with those of literature. High precision data for 200 pg osmium samples is gotten,which means that the isotope compositions of trace Os (10-9~10-12)in geological samples is determinable. This technique is very important to the developement of osmium isotopic geochemistry in China. |
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| Keywords: | osmium isotope negative thermal ionization mass spectrometry high precision determianation |
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