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郭振华, 何汉江, 田凤英. 混合酸分解-电感耦合等离子体质谱法测定磷矿石中15种稀土元素[J]. 岩矿测试, 2014, 33(1): 25-28.
引用本文: 郭振华, 何汉江, 田凤英. 混合酸分解-电感耦合等离子体质谱法测定磷矿石中15种稀土元素[J]. 岩矿测试, 2014, 33(1): 25-28.
Zhen-hua GUO, Han-jiang HE, Feng-ying TIAN. Determination of Rare Earth Elements in Phosphate Ores by Inductively Coupled Plasma-Mass Spectrometry with Mixed Acid Dissolution[J]. Rock and Mineral Analysis, 2014, 33(1): 25-28.
Citation: Zhen-hua GUO, Han-jiang HE, Feng-ying TIAN. Determination of Rare Earth Elements in Phosphate Ores by Inductively Coupled Plasma-Mass Spectrometry with Mixed Acid Dissolution[J]. Rock and Mineral Analysis, 2014, 33(1): 25-28.

混合酸分解-电感耦合等离子体质谱法测定磷矿石中15种稀土元素

Determination of Rare Earth Elements in Phosphate Ores by Inductively Coupled Plasma-Mass Spectrometry with Mixed Acid Dissolution

  • 摘要: 磷矿石中伴生的大量稀土,是继离子型稀土矿后重要的稀土后备资源。对磷矿石稀土元素分析测定方法的研究具有重要意义。本实验采用盐酸-硝酸-氢氟酸-硫酸体系消解、王水提取,建立了应用电感耦合等离子质谱法(ICP-MS)测定磷矿石中15种稀土元素的分析方法。经优化实验选取了合适的称样量以保证分析结果的准确可靠。选择合适的分析同位素及采用干扰校正方程以消除质谱干扰,利用103Rh为内标元素,有效抑制了分析信号的动态漂移,用于测定磷矿石国家标准物质中的15种稀土元素,方法的检出限为0.001~0.021 μg/g,精密度均小于6.0%(n=12),加标回收率在95.7%~108.0%。适合推广运用于大批量磷矿石中稀土分量的快速分析

     

    Abstract: It is known that a large amount of rare earth elements (REEs) is contained in phosphate rock, making it an important reserve of REEs after ion-type REEs ores. Therefore, it is significant to analyze and study the determination method for REEs in phosphate rock. Phosphate ore samples were digested with HF-HNO3-HCl-H2SO4-aqua regia. A method for the determination of 15 REEs in phosphate ores by Inductively Coupled Plasma-Mass Spectrometry (ICP-MS) was established. Some parameters affecting the determination, such as sample weight, sample digestion method, selected determination isotopes and interference correction were investigated. Matrix effect and sensitivity drift were monitored and corrected by an interior isotope of 103Rh. The recoveries of the method are 95.7%-108.0%, detection limits are 0.001-0.021 μg/g and precision (RSD) is less than 6% (n=12). The method is suitable for analysis of rare earth elements in phosphate ores.

     

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