Th-determination in Rare Earth(1) studies on the Hydrogen Peroxide Method of Th-determination

稀土類中 토리움의 分離定量 에 관하여 (第一報) 過酸化水素法에 對한 檢討

  • Choi, Han-Suk (Inorganic Chemistry Section, Central Research Laboratory) ;
  • Park Soon Za (Inorganic Chemistry Section, Central Research Laboratory)
  • Published : 19571100

Abstract

On the performance of the hydrogen peroxide method for Th-determination we encountered some difficulties, namely the formation of the insoluble matter occured in the nearly neutral solution after evaporation. We carried out the Th-determination in the mixture of the Th and some kind of the rare earth, and found that the insoluble matter was not formed in case of the mixture of Th and some kind of rare earth, but formed in case of Monazite. The formation of the insoluble matter in the case of Monazite sand, however, could be avoid by using the beaker instead of the evaporating dish and by adding the water repeatedly before it was completely evaporated to dryness.

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References

  1. Z. Angew. chem. v.15 Benz
  2. z. Anal. chem. v.42 Benz
  3. chem. Z fg v.34 Meyer;Speter
  4. z. Anal. chem. v.50 Meyer;Speter
  5. Thorium and its Compounds, Institute of Chemistry E. White
  6. J.A.C.S. v.36 Carney;Campbell
  7. 稀元素의 化學分析 木村健二部;植村琢
  8. Analytical Chemistry of the Myanhattan Project. Rodden
  9. The Analysis of Minerals and Ores of the Rarer Elements W.R. Schoeller;A.R. Powell
  10. A Comprehensive Treatise on Inorganic and Theoritical Chemistry J.W. Mellor
  11. 無機化學全書 v.IX-1;IX-2 柴田雄次