Investigation of Acids on the Germanium Analysis by HG-ICP-AES

HG-ICP-AES를 이용한 Germanium 분석에 있어서 보조산에 대한 연구

  • Lim, Hyuneui (Department of Chemistry, Korea University) ;
  • Lee, Yeunhee (Advanced Analysis Center, Korea Institute of Science and Technology) ;
  • Kim, Sun-Tae (Advanced Analysis Center, Korea Institute of Science and Technology) ;
  • Kim, Young-Sang (Department of Chemistry, Korea University) ;
  • Kim, Kang-Jin (Department of Chemistry, Korea University)
  • 임현의 (고려대학교 화학과) ;
  • 이연희 (한국과학기술연구원 특성분석센터) ;
  • 김선태 (한국과학기술연구원 특성분석센터) ;
  • 김영상 (고려대학교 화학과) ;
  • 김강진 (고려대학교 화학과)
  • Received : 2001.01.02
  • Published : 2001.02.25

Abstract

The present work is aimed to evaluate the conditions of the hydride generation (HG) for germanium analysis by inductively coupled plasma (ICP)-atomic emission spectrometry (AES). Twelve different kinds of acids were used such as phosphoric, hydrochloric, nitric, sulfuric, perchloric, boric, tartaric, malic, oxalic, tannic, citric, and acetic acid. It was found that phosphoric acid yielded the maximum efficiency of hydride generation. Also, efficient hydride generation was obtined with the buffer solutions containing phosphate ions over a wide range of pH. In addition, in the presence of phosphoric acid the interference caused by metals was suppressed in the hydride generation of germanium. As the concentrations of a reducing agent and a stabilizing increased the hydride generation efficiency and the acid concentration proviaing the maximum intensity were increased. By using an analytical method developed in this study, the contents of germanium in water and rock samples were determined. The detection limit of germanium in the presence of phosphoric acid was $0.03{\mu}g/L$.

Keywords

germanium analysis;phosphoric acid;phosphate ion;HG-ICP-AES

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