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http://dx.doi.org/10.5012/jkcs.2002.46.5.419

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

Hwang, Hun (Department of Chemistry, Kangwon National University)
Kim, Jin Ho (Department of Chemistry, Kangwon National University)
Publication Information
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.
Keywords
Flow Injection Analysis; Fe(II); Fe(III);
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