title: Quantitative Determination of Iron Ions Based on a Resonance Raman (RR) Probe-Phenanthroline.
abstract: In this paper, we demonstrate a new promising resonance Raman (RR)-based method for the determination of Fe3+concentrations in aqueous solutions. Iron ions were quantified at a low concentration range by employing hydroxylamine hydrochloride as the reductant, and phenanthroline as the complexing agent, thereby reducing Fe3+to Fe2+. The addition of Fe3+to the detection reagent resulted in a rapid color change from colorless to orange-red, together with an obvious new RR band appearing at 1459 cm-1. Herein, the RR intensity of the phenanthroline-Fe2+complex strengthened with increasing Fe3+concentration, which was identified from the variation of the Raman spectra. Therefore, we successfully detected Fe3+at lower concentrations using the proposed method, illustrating its great potential for the detection of Fe3+with abundant RR fingerprint information. More importantly, the proposed method exhibited a wide liner range from 0.05 to 10 μg/mL.
authors.affiliation: Key Laboratory of Preparation and Applications of Environmental Friendly Materials, Jilin Normal University, Ministry of Education.
authors.forename: Liang
authors.initials: L
authors.lastname: Wang
authors.forename: Yi
authors.initials: Y
authors.lastname: Zhang
authors.forename: Yeonju
authors.initials: Y
authors.lastname: Park
authors.forename: Lei
authors.initials: L
authors.lastname: Chen
authors.forename: Young Mee
authors.initials: YM
authors.lastname: Jung