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王妍力, 罗明标, 柯麟, 徐志良, 方小伟. 氧化镁烧结-电感耦合等离子体质谱法测定砂岩型铀矿中的痕量铼[J]. 岩矿测试, 2016, 35(4): 373-377. DOI: 10.15898/j.cnki.11-2131/td.2016.04.006
引用本文: 王妍力, 罗明标, 柯麟, 徐志良, 方小伟. 氧化镁烧结-电感耦合等离子体质谱法测定砂岩型铀矿中的痕量铼[J]. 岩矿测试, 2016, 35(4): 373-377. DOI: 10.15898/j.cnki.11-2131/td.2016.04.006
Yan-li WANG, Ming-biao LUO, Lin KE, Zhi-liang XU, Xiao-wei FANG. Determination of Trace Rhenium in Sandstone-type Uranium Deposits by Inductively Coupled Plasma-Mass Spectrometry with Magnesium Oxide Sintering[J]. Rock and Mineral Analysis, 2016, 35(4): 373-377. DOI: 10.15898/j.cnki.11-2131/td.2016.04.006
Citation: Yan-li WANG, Ming-biao LUO, Lin KE, Zhi-liang XU, Xiao-wei FANG. Determination of Trace Rhenium in Sandstone-type Uranium Deposits by Inductively Coupled Plasma-Mass Spectrometry with Magnesium Oxide Sintering[J]. Rock and Mineral Analysis, 2016, 35(4): 373-377. DOI: 10.15898/j.cnki.11-2131/td.2016.04.006

氧化镁烧结-电感耦合等离子体质谱法测定砂岩型铀矿中的痕量铼

Determination of Trace Rhenium in Sandstone-type Uranium Deposits by Inductively Coupled Plasma-Mass Spectrometry with Magnesium Oxide Sintering

  • 摘要: 砂岩型铀矿中铀的平均含量为635 μg/g,而铼的含量仅为0.3~1.9 μg/g,由于铼的含量低,准确测定高含量铀矿样中的低含量铼仍是分析化学的一个难题。本文建立了电感耦合等离子体质谱法测定砂岩型铀矿中痕量铼的方法。样品经过氧化镁烧结,热水浸提以及采用103Rh作内标元素等方式消除了铀、钼及其他基体元素对测定铼的干扰。在最佳条件下,痕量铼的检出限可低至0.12 ng/g,回收率达99.8%。本方法通过多种标准样品验证,铼的测定值与标准值吻合,对铼含量在0.06~180.57 μg/g范围内的实际样品进行测定,相对标准偏差均小于1.5%,能够满足砂岩型铀矿等高含量铀矿中痕量铼的测定需求。

     

    Abstract: The average content of uranium in sandstone-type uranium deposits is 635 μg/g, whereas the content of rhenium is 0.3-1.9 μg/g. Because of low rhenium content, now precise determination of low Re in high U ores remains unresolved. In this study, a method for the determination of trace Re in sandstone-type uranium deposits by Inductively Coupled Plasma-Mass Spectrometry was developed. Samples were digested by MgO sintering, and were then extracted by hot water. 103Rh was used as the internal standard element to eliminate the interferences of uranium, molybdenum and other matrix elements on Re. Under optimum conditions, the detection limit of trace rhenium is 0.12 ng/g, and the recovery is 99.8%. The method was validated by a variety of standard samples, the measured Re contents are in good agreement with the standard values. The relative standard deviation (RSD) is less than 1.5% for Re contents of 0.06-180.57 μg/g, which meets the requirement of determining trace Re in high U ores from sandstone type uranium deposits.

     

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