| 铼-锇测年法中锇的化学行为的研究 |
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| 引用本文： | 何红蓼,杜安道,邹晓秋,孙亚莉,殷宁万.铼-锇测年法中锇的化学行为的研究[J].分析化学,1994,22(2):109-114. |
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| 作者姓名： | 何红蓼 杜安道 邹晓秋 孙亚莉 殷宁万 |
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| 作者单位： | 地质矿产部岩矿测试技术研究所!北京100037 |
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| 基金项目： | 国家自然科学基金，地质行业科技发展基金联合资助项目 |
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| 摘 要： | 本文研究了不同介质中Os的价态变化和蒸馏过程以及等离于体质谱(ICP/MS)测定中的同位素分馏现象。用水吸收蒸馏出的OsO_4可使Os的ICP/MS测量灵敏度提高到50倍.在此基础上建立了辉钼矿的Re-Os测年法。测得的辉钼矿Re-Os年龄符合地质背景,并与其它传统测年法的结果一致。
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| 关 键 词： | 铼-锇地质年龄测定法 等离子体质谱 锇的化学行为 |
Chemical Behavior of Osmium in the Rhenium-Osmium Geochronometry |
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| He Hongliao,Du Andao,Zou Xiaoqiu,Sun Yali,Yin Ningwan.Chemical Behavior of Osmium in the Rhenium-Osmium Geochronometry[J].Chinese Journal of Analytical Chemistry,1994,22(2):109-114. |
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| Authors: | He Hongliao Du Andao Zou Xiaoqiu Sun Yali Yin Ningwan |
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| Abstract: | The valence changes of osmium in varoious media and the isotope fractionation during distillation and determination of osmium using ICP-MS were studied. By using water as an absorbent for osmium tetraoxide, the sensitivity of osmium in ICP-MS measurement increases by a factor of 50. A rhenium-osmium dating technique for molybdenites was set up based on this study. The rhenium-osmium ages of molybdenites determined conform satisfactorily with their geological backgrounds and agree reasonably with the results obtained by other conventional geochronometries. |
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| Keywords: | Rhenium-osmium geochronometry Inductively coupled plasma-mass spectrome-try Chemical behavior of osmium |
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