University of North Florida
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Stuart Chalk, Ph.D.
Department of Chemistry
University of North Florida
Phone: 1-904-620-1938
Fax: 1-904-620-3535
Email: schalk@unf.edu
Website: @unf

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Hexacyanoferrate(III)

  • IUPAC Name: iron(3+);hexacyanide
  • Molecular Formula: C6FeN6-3
  • CAS Registry Number: 13408-62-3
  • InChI: InChI=1S/6CN.Fe/c6*1-2;/q;;;;;;-3
  • InChI Key: YAGKRVSRTSUGEY-UHFFFAOYSA-N

@ ChemSpider@ NIST@ PubChem

Citations 5

"Voltammetric/amperometric Detection For Flow Injection Systems"
Anal. Chim. Acta 1986 Volume 188, Issue 1 Pages 263-267
Craig E. Lunte, Sy-wen Wong, Thomas H. Ridgway and William R. Heineman, Kenneth W. Chan

Abstract: A dual-electrode thin-layer flow cell is described for voltammetric/amperometric detection. The potential at the upstream electrode is scanned. The downstream electrode is kept at a constant potential and is used to monitor the redox reaction occurring at the upstream electrode without the charging current associated with scanning the potential. Selectivity is enhanced, relative to direct voltammetric detection at a single electrode, because only chemically reversible redox couples are detected. A preliminary evaluation with Fe(CN)63- and ascorbic acid is presented.
Amperometry Electrode Electrode Voltammetry Flowcell Selectivity Theory

"Flow Injection Analysis Methods For Determination Of Diffusion Coefficients"
Anal. Chim. Acta 1997 Volume 350, Issue 3 Pages 359-363
Gongwei Zou*, Zhen Liu and Congxiang Wang

Abstract: Two flow injection analyzes (FIA) methods for the determination of diffusion coefficients in a straight single tube FIA system were developed. Based on the analytical solution of the convection-diffusion equation, linear relationships of the logarithmic values of the dispersion coefficient (D) and the half-peak width (W-1/2) with the diffusion coefficient (D-m) were obtained. Experiments were designed to verify these methods. For example, for potassium hexacyanoferrate (III) a D-m value of 0.72 x 10(5) cm(2) s-1 was found versus a literature value of 0.76 x 10(5) cm(2) s-1 (error, 5%). For potassium hexacyanoferrate (II) a D-m value of 0.67 x 10(5) cm(2) s-1 was obtained versus a literature Value of 0.63 x 10(5) cm(2) s-1 (error, 6%). The diffusion coefficients of some important biomedical compounds, such as dopamine, epinephrine, norepinephrine and ascorbic acid, were then determined. The values of 10(5) D-m/cm(2) s-1 are 0.60±0.03, 0.44±0.02, 0.60±0.01 and 0.68±0.06, respectively. 18 References
Straight tube Diffusion coefficients Peak width

"Collection Efficiency Studies For A Wall-jet Segmented Ring-disc Electrode"
Anal. Proc. 1995 Volume 32, Issue 12 Pages 499-501
Tom McCreedy and Peter R. Fielden

Abstract: A Pt working electrode assay in the form of a wall-jet segmented ring disc detector for use as an electrochemical detector in FIA systems is described. The segmented-ring electrode consisted of five independent Pt rods (each 1 mm diameter) located around a central Pt rod of the same dimensions with a separation between any satellite electrode and the centre disc electrode of 0.1 ± 0.01 mm. The segmented-ring electrode formed part of an electrochemical cell, with Ag/AgCl as reference electrode and was its collection efficiency was studied in a flow injection system. Portions (20 µL) of 1 mM potassium hexacyanoferrate(III) [as test analyte] were injected into a stream of 0.1 M KCl (1 ml/min) of the flow-injection system and the analyte was reduced to Fe2+ at the centre disc electrode and reoxidized back to Fe3+ at the collector electrode. The collection efficiency obtained (up to 10.1% at an individual electrode) of this array was superior to previously reported wall-jet segmented ring disc electrodes. A flow rate study was also performed to verify that the centre disc and segmented ring electrodes displayed wall-jet and planar electrode response characteristics.
Amperometry Electrode Electrode Voltammetry Optimization

"Electrostatically Immobilized Hexacyanoferrate Ions As Redox Mediators In Biochemical Sensing: Controlled Release And Cyclic Voltammetric Behaviour"
Biosens. Bioelectron. 1991 Volume 6, Issue 7 Pages 589-594
Dale W. Harak and Horacio A. Mottola*

Abstract: The release rate of Fe(CN)63-, immobilized on the anion exchangers poly-(4-vinylpyridine) (I), Dowex 1-X8 and QAE-Toyopearl-550 c, into the carrier solution in continuous-flow systems was investigated. After 1 h, >65% of the Fe(CN)63- 'bleeding' from I initially observed was still maintained, and the concentration. in the carrier solution was ~10 µM; for the other two ion exchangers the Fe(CN)63- concentration. in the carrier at this stage was in the range 0.2 to 0.3 µM. The ease of electron transfer from and to the immobilized redox mediator was also investigated by examining the cyclic voltammetric behavior of Fe(CN)63- immobilized on the three materials. A modified carbon-paste working electrode containing 70% of graphite, 25% of mineral oil and 5% of immobilized material was used, and the supporting electrolyte was 0.01 M phosphate buffer containing 0.05 M KCl. For mediation at low pH, the QAE-Toyopearl support was preferable, but for release from a solid reservoir at pH ~7, I was preferred.
Electrode Sensor Voltammetry Buffer Immobilized enzyme pH Dowex Immobilized reagent

"Millisecond Time-scale UV-visible Spectrophotometer Based On A Double-diode Array Detector Coupled To A Stopped-flow Instrument"
Instrum. Sci. Technol. 1994 Volume 22, Issue 1 Pages 13-23
Achim Gerhard; Wolfgang Gaede; Anton Neubrand; Volker Zang; Rudi van Eldik; Peter Stanitzeck

Abstract: A UV-visible rapid-scan spectrometer consisting of a double-diode-array optical simultaneous multi-channel analyzer. (SI Spectroscopy Instruments GmbH, Gilching, Germany) coupled with a standard stopped-flow instrument was constructed (details given). The system enabled the direct recording of absorbance spectra on a real time base, with good optical resolution in the millisecond time range, as well as absorbance-time traces as a function of wavelength. Details are given of calibration procedures and a series of typical measurements of the electron transfer reaction between hexacyanoferrate(III) and L-ascorbic acid are presented to demonstrate the performance of the system. Results are discussed.
Spectrophotometry Stopped-flow