Journal of the Korean Chemical Society (대한화학회지)

Korean Chemical Society (대한화학회)
권호 표지

Rapid Volumetric Assay of Fluorspar Concentrate

고품위 형석의 신속 용량법

  • 최규원 (서울대학교 문리과대학 화학과) ;
  • 오준석 (금속·연료 종합 연구소) ;
  • 이광우 (금속·연료 종합 연구소)
  • Published : 19640900
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Abstract

A volumetric method of the determination of calcium carbonate and calcium fluoride in fluorspar concentrate is described. The carbonate is converted into solution by treatment of the sample in HNO$_3$-acetone (l% by volume) mixture, and the fluoride by treating the residue with H$_3BO_3$-HCl mixture. The calcium in the solution is determined volumetrically using EDTA standard solution. The selective dissolution of calcium carbonate by HNO$_3$-acetone mixture is superior to Bidtel's acetic method and little correction for the dissolution of calcium fluoride is needed. Triethanolamine is found to be superior to KCN in masking heavy metal ions.

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References

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