Analytical Science and Technology (분석과학)

The Korean Society of Analytical Sciences (한국분석과학회)
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Studies on Analysis of Gallium and Indium in Zinc Ores by Inductively Coupled Plasma Atomic Emission Spectrometry

유도결합 플라즈마 원자방출 분광법에 의한 아연광 중 Ga 및 In의 분석에 관한 연구

  • Hwang, Youn-Ok (Instrumental Analysis Group, Korea Institute of Geology, Mining and Materials) ;
  • Sim, Sang-Kwon (Instrumental Analysis Group, Korea Institute of Geology, Mining and Materials) ;
  • Sung, Hack-Je (Instrumental Analysis Group, Korea Institute of Geology, Mining and Materials) ;
  • Yang, Myung-Kwon (Instrumental Analysis Group, Korea Institute of Geology, Mining and Materials)
  • 황윤옥 (한국자원연구소 기기분석연구그룹) ;
  • 심상권 (한국자원연구소 기기분석연구그룹) ;
  • 성학제 (한국자원연구소 기기분석연구그룹) ;
  • 양명권 (한국자원연구소 기기분석연구그룹)
  • Received : 1993.02.05
  • Published : 1993.03.25
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Abstract

The separation of gallium and indium from the matrix elements such as zinc and other ions, especially form Fe(III) ion was studied for the determination of trace level of them in zinc ores and zinc blendes by inductively coupled plasma atomic emission spectrometry(ICP-AES). Gallium and indium were extracted from the sample solution with a solvent of tributyl phosphate(TBP). The type and concentration of acid, interferences of other ions, the ratio of aqueous phase to organic phase, TBP concentration, sripping efficiency were optimized for the effective extraction. Gallium and indium were separated from other ions in the 5N hydrochloric acid solution of the samples by the extraction with 100% TBP. In this time, Fe(III) was reduced to Fe(II) with hydroxylamine hydrochloride to prevent its coextraction prior to the main extraxtion. After stripped from organic phase by the back-extraction with 0.02N HCl, they were determined in the aqueous phase by ICP-AES. This method was known to be quantitative from the overall extraction of more than 95%.

아연광 중 미량으로 존재하는 갈륨 및 인듐을 유도결합 플라스마 원자방출분광법(ICP-AES)으로 분석할 때 간섭하는 아연 및 다른 이온들과 특히 Fe(III) 이온으로부터 이들을 분리하는 방법에 대해 연구하였다. 갈륨과 인듐을 tributyl phosphate(TBP)로 용매추출하였는데 이때 영향을 주는 산농도, 다른 이온들의 간섭, 수용액상/유기상의 비율, TBP의 농도 및 탈거율 등에 대하여 조사하였다. 갈륨과 인듐이 함유되어 있는 아연광을 녹인 5N 염산용액에서 100% TBP로 추출하여 아연 및 기타 간섭이온들로부터 분리하였으며, 이때 철(III)이온은 hydroxylamine hydrochloride를 사용하여 Fe(II)로 환원시켜 coetraction되는 것을 방지하였다. 유기상으로부터 갈륨과 인듐의 탈거는 0.02N 염산용액으로 역추출하여 이루어졌으며 이 용액을 ICP-AES로 측정하여 이들을 정량하였다. 전체적으로 추출률이 95% 이상으로 정량적이었다.

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Acknowledgement

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