title: Methodologies for the analytical determination of ferrate(VI): a review.
abstract: This paper reviewed different analytical techniques to determine concentrations of the environmentally-friendly oxidant ferrate(VI) (Fe(VI)O(2-)(4), Fe(VI)) anion in solid and solution samples. The techniques included volumetric (chromite and arsenite), electrochemical (cyclic voltammetry and potentiometry), and spectrophotometric methods (Fourier transform infrared, Mossbauer, UV-Visible, 2,2-azino-bis(3-ethylbenzothiazoline-6-sulfonate (ABTS), and fluorescence). The importance of the techniques were briefly described. This paper also presented a newly developed method for the determination of low concentrations (0.25 μM) of Fe(VI)) using the reaction between Fe(VI) and iodide (I(-)), which formed the yellowish color of I(-)(3) that could be measured spectrophotometrically at 351 nm. The increase in I(-)(3) was linear with respect to Fe(VI) added (0.25-76 μM) in buffered solutions at pH 5.5-9.3. The linearity was not affected by the ions present in tap water.
authors.affiliation: College of Chemistry and Chemical Engineering, Chongqing University, Chongqing, China.
authors.forename: Zhiyong
authors.initials: Z
authors.lastname: Luo
authors.forename: Meagan
authors.initials: M
authors.lastname: Strouse
authors.forename: Jia-Qian
authors.initials: JQ
authors.lastname: Jiang
authors.forename: Virender K
authors.initials: VK
authors.lastname: Sharma
mesh_terms: D055664:Electrochemical Techniques / Q000379:methods*; D007501:Iron / Q000032:analysis* / Q000737:chemistry; D016877:Oxidants / Q000737:chemistry; D010084:Oxidation-Reduction; D012974:Sodium Iodide / Q000737:chemistry; D013053:Spectrophotometry / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000737:chemistry; D018508:Water Purification / Q000379:methods*
chemical_list: D016877:Oxidants; D014874:Water Pollutants, Chemical; C017311:ferrate ion; D007501:Iron; D012974:Sodium Iodide