| 砂岩铀矿地质样品中铀含量仲裁分析方法——同位素稀释电感耦合等离子体质谱法 |
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| 引用本文： | 郭冬发,武朝晖,崔建勇,谭靖,张彦辉. 砂岩铀矿地质样品中铀含量仲裁分析方法——同位素稀释电感耦合等离子体质谱法[J]. 原子能科学技术, 2008, 42(3): 277-283. DOI: 10.7538/yzk.2008.42.03.0277 |
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| 作者姓名： | 郭冬发 武朝晖 崔建勇 谭靖 张彦辉 |
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| 作者单位： | 核工业北京地质研究院，北京 ;100029 |
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| 摘 要： | 本工作研究铀矿地质样品中铀含量仲裁分析方法——同位素稀释电感耦合等离子体质谱法。样品经混酸密闭消解溶矿，采用浓缩铀为稀释剂，使用高分辨电感耦合等离子体质谱测定铀同位素比值，进而计算样品中的铀含量。本方法具有明晰的计量溯源特性，铀的测量范围为1～10000μg/g，对于铀含量约为4μg/g的砂岩样品，相对扩展不确定度小于4.0%（扩展因子K=2.57），可满足砂岩铀矿地质样品中铀含量仲裁分析要求。
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| 关 键 词： | 砂岩铀矿地质样品 铀含量 同位素稀释电感耦合等离子体质谱 |
| 文章编号： | 1000-6931(2008)03-0277-07 |
| 收稿时间： | 2007-06-15 |
| 修稿时间： | 2007-06-15 |
Arbitral Analysis of Uranium in Sandstone Uranium Geological Samples by Isotope Dilution Inductively Coupled Plasma Mass Spectrometery |
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| GUO Dong-fa,WU Zhao-hui,CUI Jian-yong,TAN Jing,ZHANG Yan-hui. Arbitral Analysis of Uranium in Sandstone Uranium Geological Samples by Isotope Dilution Inductively Coupled Plasma Mass Spectrometery[J]. Atomic Energy Science and Technology, 2008, 42(3): 277-283. DOI: 10.7538/yzk.2008.42.03.0277 |
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| Authors: | GUO Dong-fa WU Zhao-hui CUI Jian-yong TAN Jing ZHANG Yan-hui |
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| Affiliation: | Beijing Research Institute of Uranium Geology, Beijing 100029, China |
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| Abstract: | A method for determination of uranium in sandstone uranium geological samples by isotope dilution inductively coupled plasma mass spectrometry (ID-ICP-MS) was evaluated. Samples were digested and spiked with highly enriched uranium (HEU) in a closed vessel using mixed acids, and 235U/238U ratio was measured by high resolution ICP-MS. The method is capable of determining uranium contents of 1-10 000 μg/g with relative expanded uncertainty of 4.0% at uranium contents of 4 μg/g, and is qualified for the arbitral analysis of uranium in sandstone uranium geological samples. |
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| Keywords: | standstone uranium geological samples uranium content isotope dilution inductively coupled plasma mass spectrometery |
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