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Development of an Analytical Method for the Spectrometric Simultaneous Determination of Fe<sup>2+</sup> and Fe<sup>3+</sup> Ions Using a Technique of Flow Injection Analysis
Development of an Analytical Method for the Spectrometric Simultaneous Determination of Fe2+ and Fe3+ Ions Using a Technique of Flow Injection Analysis
Journal of the Korean Chemical Society. 2002. Oct, 46(5): 419-437
  • Published : October 20, 2002
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Hwang, Hun
Kim, Jin Ho

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.
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