Simultaneous Spectrophotometric Analysis of Fe2+ and Fe3+ Ions

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  • M. Holbová Department of Analytical Chemistry, Faculty of Science, Masaryk University, Brno
  • P. Lubal Department of Analytical Chemistry, Faculty of Science, Masaryk University, Brno

Abstrakt

Two new procedures for simultaneous spectrophotometric analysis of ferrous and ferric ions utilizing their different reactivities to a selective reagent (gallic acid) and/or reagent mixture (5-sulfosalicylic acid and 1,10-phenanthroline) were developed. The measured experimental data are treated by Artificial Neural Network. The concentration ranges used were 0.5-4.0 mg.l-1 (Fe2+) and 1.0-4.0 mg.l-1 (Fe3+) for the determination with gallic acid and 5.0-30.0 mg.l-1 (both ions) for the determination with the reagent mixture. It was demonstrated for the latter method that transition metal cations (Co2+, Ni2+, Mn2+, Cu2+, Zn2+) do not interfere and the method can be used for iron speciation analysis of Czech mineral waters. The proposed methods give precise (RSD < 2 %) and accurate results.

Publikováno

15.04.2005

Jak citovat

Holbová, M., & Lubal, P. (2005). Simultaneous Spectrophotometric Analysis of Fe2+ and Fe3+ Ions. Chemické Listy, 99(3). Získáno z http://ww-w.chemicke-listy.cz/ojs3/index.php/chemicke-listy/article/view/2068

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