Analytical Science and Technology (분석과학)

The Korean Society of Analytical Sciences (한국분석과학회)
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Determination of gold concentration in ore by ICP-AES with MIBK

ICP-AES와 MIBK 용매를 이용한 광물중의 금 분석

  • Lim, Heon-Sung (Center for Chemical Analysis, Korea Research Institute of Chemical Technology) ;
  • Lee, Sueg-Geun (Center for Chemical Analysis, Korea Research Institute of Chemical Technology)
  • 임헌성 (한국화학연구원 화학분석센터) ;
  • 이석근 (한국화학연구원 화학분석센터)
  • Received : 2007.09.12
  • Accepted : 2007.10.29
  • Published : 2007.12.25
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Abstract

The 242.795 nm on ICP-AES for the gold analysis was the most sensitive wavelength which was also interfered severely by the spectra of other metal ions such as manganese, chromium, cobalt, and iron. In order to analyze the gold in ore, the gold must be separated from the interfering ions. The best solvent for separation of gold in ore solution was 10 % n-hexane contained MIBK mixed solvent. The gold recovery was 97.5 % from mixed metal solution contained about 2 M $HNO_3$ and 0.5 M HCl.

ICP-AES를 이용하여 금을 분석할 때 감도가 가장 우수한 242.795 nm 파장은 분광학적 간섭을 일으키는 망간, 크롬, 코발트, 철 등의 원소들 때문에 광물에서 금의 분석은 불가능하다. 여기에서는 이들 원소들을 정량적으로 분리하는 분리방법을 연구하였다. 광물에서 금을 분리하기 위하여 광물을 용해한 산 용액에 MIBK 용매를 사용하여 정량적으로 추출하였다. 이때 질산과 염산의 혼산과 MIBK/n-hexane의 혼합용매는 효율적으로 금을 추출할 수 있었으며, 회수율은 97.5% 이상이었다.

Keywords

References

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