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Golovko D.A.,Ukraine State Chemical Technological University | Sharma V.K.,Florida Institute of Technology | Suprunovich V.I.,Ukraine State Chemical Technological University | Pavlova O.V.,Ukraine State Chemical Technological University | And 3 more authors.
Analytical Letters | Year: 2011

A new potentiometric titration method using a Pt wire as an indicator electrode was developed for quantitative determination of ferrate(VI) (FeVIO2 4) in the submillimolar to millimolar concentration range in a strong alkaline solution. A Ag/AgCl electrode was the reference electrode and the titrant used was chromium(III) hydroxide solution. The developed method is relatively simple and faster than the colorimetric titration technique. The method eliminates human error associated with the endpoint detection and increases accuracy of the results with respect to the colorimetric titration. The method was applied to study the decay of synthesized ferrate(VI) in alkaline solution. © Taylor & Francis Group, LLC.


Golovko D.A.,Ukraine State Chemical Technological University | Sharma V.K.,Florida Institute of Technology | Pavlova O.V.,Ukraine State Chemical Technological University | Belyanovskaya E.A.,Ukraine State Chemical Technological University | And 3 more authors.
Central European Journal of Chemistry | Year: 2011

A new amperometric titration method was developed for quantitative determination of ferrate(VI) (FeVIO4 2-) in the 7.06×10-5-5.73×10-3 M concentration range. Chromium(III) hydroxide solution was used as the titrant. The diffusion current (Id) had a linear relationship with the concentration of ferrate(VI) and slopes were dependent on the concentration of NaOH. The amperometric titration could detect a lower concentration of ferrate(VI) than could potentiometric and colorimetric titrations. The method was applied successfully to determine concentrations of ferrate(VI), generated electrochemically, in strong alkaline solutions. © Versita Sp. z o.o.

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