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Rare earth impurities in high purity lanthanum oxide determined by neutron activation analysis

  • Nguyen Van Suc
  • H. B. Desai
  • R. Parthasarathy
  • S. Gangadhaŕan
Article

Abstract

Individual rare earth impurities in high purity La2O3 (≧99.9%) have been determined by NAA after pre-separation of the matrix (La). The separation is carried out on an anion exchanger (Dowex 1×8) using different mixtures of methanol/nitric acid as eluants. The rare earth elements from Dy to Lu are eluted quantitatively using a 10% 1M HNO3-90% methanol mixture, while the light rare earths from Ce to Gd are eluted quantitatively using a 10% 0.05M HNO3-90% methanol mixture. La, which is retained on the column, is eluted using 0.1M HNO3. The recoveries of the various rare earth elements have been checked using radiotracers and also by spiking the sample with known amount of elements, and the recoveries are found to be quantitative. Results obtained on a typical high purity lanthanum oxide are reported here.

Keywords

Rare Earth HNO3 High Purity Lanthanum Activation Analysis 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Akaémiai Kiadó 1992

Authors and Affiliations

  • Nguyen Van Suc
    • 1
  • H. B. Desai
    • 2
  • R. Parthasarathy
    • 2
  • S. Gangadhaŕan
    • 2
  1. 1.Institute for Nuclear ResearchDalatVietnam
  2. 2.Analytical Chemistry DivisionBhabha Atomic Research CentreBombayIndia

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