Short communication, Note

https://doi.org/10.5562/cca2167

1,10-Phenanthroline Modulated Redox Potentials Explored for Benign Iron Speciation Analysis

Masood Ahmad Rizvi ; Department of Chemistry, University of Kashmir, Srinagar, 190006, J&K, India
Norio Teshima ; Department of Applied Chemistry, Aichi Institute of Technology, 1247 Yachigusa, Yakusa-cho, Toyota 470-0392, Japan
Ghulam Mustafa Peerzada

Abstract

The objective of this study is to develop a simple, environmentally benign alternate analytical method for simultaneous estimation of iron oxidation states. This proposed method of iron speciation is based on 1,10-phenanthroline (phen) modified redox potential of transition metal ions. In a pre-step ex¬cess cerium(IV) oxidizes iron(II) in sample to iron(III). Initial back titration of un-reacted cerium(IV) with cobalt(II) in presence of phen gives amount of iron(II) in sample, reduction of iron(III) with cobalt(II) is then used to estimate total iron as iron(III). The potentiometric titration method has been successfully test¬ed for determinations of iron(II) and total iron in synthetic and natural samples and represents a distinc¬tively green alternative to other reported protocols of iron speciation analysis. (doi: 10.5562/cca2167)

Keywords

ligand effect on redox potential; 1,10-phenanthroline; iron speciation; green analytical chemistry; potentiometric titration

Hrčak ID:

111672

URI

https://hrcak.srce.hr/111672

Publication date:

20.11.2013.

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