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Development of an Analytical Method for the Spectrometric Simultaneous Determination of Fe2+ and Fe3+ Ions Using a Technique of Flow Injection Analysis

흐름주입분석기법을 이용한 Fe2+ 이온과 Fe3+이온의 광학적 동시정량을 위한 분석기법의 개발

  • Hwang, Hun (Department of Chemistry, Kangwon National University) ;
  • Kim, Jin Ho (Department of Chemistry, Kangwon National University)
  • 황훈 (강원대학교 자연과학대학 화학과) ;
  • 김진호 (강원대학교 자연과학대학 화학과)
  • Published : 2002.10.20

Abstract

An analytical method for the spectrometric simultaneous determination of the individual ions in the mix-tures of $Fe^{2+}$ and $Fe^{2+}$ ions utilizing a technique of flow injection analysis has been developed. The method was based on the oxidation reaction between $Fe^{2+}$ ion and $H_2O_2$ in an acidic medium and the subsequent formation of a red Fe$(SCN)^{3-x}_x$ ion by the complexation reaction between $Fe^{2+}$ ion and $SCN^-$ ion. Unlike the conventional methods which require separate processes for the pre-treatment of the sample solution, the current method uses the same FIA system for the pre-treatment and the analysis of the sample. The detection limit for the determination of $Fe^{2+}$ ion was found to be 6.00${\times}10^{-7}$M.

산성조건에서 $H_2O_2$에 의한 $Fe^{2+}$ 이온의 산화($Fe^{2+}{\to}Fe^{3+}$)반응과 $Fe^{3+}$이온과 $SCN^-$이온이 결합하여 붉은색 Fe$(SCN)^{3-x}_x$ 이온을 형성하는 착화반응을 도입한 흐름주입분석기법을 사용하여 $Fe^{2+}$이온과 $Fe^{2+}$이온이 공존하는 시료용액 중 각 이온들의 동시정량을 위한 분석법을 개발하였다. 이 분석법은 개별 이온들에 대한 정량단계에 앞서 혼합시료의 전처리($Fe^{2+}$이온의 예비산화 혹은 $Fe^{2+}$이온의 예비환원)단계를 거쳐야 하는 기존의 분석법들과는 달리 두가지 단계들을 동시에 수행할 수있다는 장점을 가진다. 이 분석법의 측정한계는 [$Fe^{2+}$]=6.00${\times}10^{-7}$M 이었다.

Keywords

References

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