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Updated: Jun 28, 2026

Setup of Capillary Electrophoresis-Inductively Coupled Plasma Mass Spectrometry (CE-ICP-MS) for Quantification of Iron Redox Species (Fe(II), Fe(III))
Published on: May 4, 2020
Simultaneous determination of Fe(II) and Fe(III) by kinetic spectrophotometric H-point standard addition method
J Zolgharnein1, H Abdollahi, D Jaefarifar
1Department of Chemistry, Arak University, Arak, 38156-879, Iran.
Abstract:
The H-point standard addition method (HPSAM) for simultaneous determination of Fe(II) and Fe(III) is described. The method is based on the difference in the rate of complex formation of iron in two different oxidation states with Gallic acid (GA) at pH 5. Fe(II) and Fe(III) can be determined in the range of 0.02-4.50 mug ml(-1) and 0.05-5.00 mug ml(-1), respectively, with satisfactory accuracy and precision in the presence of other metal ions, which rapidly form complexes with GA under working conditions. The proposed method was successfully applied for simultaneous determination of Fe(II) and Fe(III) in several environmental and synthetic samples with different concentration ratios of Fe(II) and Fe(III).
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