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Voltammetry of resazurin at a mercury electrode

  • Semiha Çakir EMAIL logo and Emine Arslan
Published/Copyright: March 31, 2010
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Chemical Papers
From the journal Chemical Papers Volume 64 Issue 3

Abstract

Electrochemical behavior of resazurin on HMDE in Britton-Robinson (B-R) buffers (pH 2.0–10.0) was studied using the square-wave voltammetry (SWV), square-wave adsorptive stripping voltammetry (SWAdSV), and cyclic voltammetry (CV) techniques. The voltammogram of resazurin in B-R buffer at pH < 4.0 exhibited two cathodic reduction peaks. The voltammetric peaks were obtained at −0.144 V (reversible) and −1.250 V (irreversible) at pH 3.2, and correspond to the reduction of resorufin to dihydroresorufin and to the catalytic hydrogen wave, respectively. At pH > 4.0, a new irreversible cathodic reduction peak, assigned to the protonation of N-oxide on the phenoxazin ring, was observed. Electrochemical parameters (I p/E p, I p/v, I p/pH, I p/t acc) of the compound were determined. From the voltammetric data, electrochemical reduction mechanisms for all peaks have been suggested. Maximum peak current for the reversible peak was obtained at pH 4.1. A linear relationship between the current and concentration was determined, and also the lowest detection limit was found as 3.25 × 10−8 mol L−1 and 1.98 × 10−10 mol L−1 for SWV and SWAdSV, respectively.

Keywords: resazurin; resorufin; square-wave voltammetry; cyclic voltammetry; HMDE

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Published Online: 2010-3-31
Published in Print: 2010-6-1

© 2009 Institute of Chemistry, Slovak Academy of Sciences

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https://doi.org/10.2478/s11696-010-0007-9
Keywords for this article
resazurin; resorufin; square-wave voltammetry; cyclic voltammetry; HMDE

Articles in the same Issue

  1. A proposal of reference values for relative uncertainty increase in spectrophotometric analysis of pharmaceutical formulations
  2. Spectrophotometric quantification of fluoxetine hydrochloride: Application to quality control and quality assurance processes
  3. A simple turbidimetric flow injection system for saccharin determination in sweetener products
  4. Determination of metoprolol tartrate by capillary isotachophoresis
  5. Model predictive control of a CSTR: A hybrid modeling approach
  6. Application of extended NRTL equation for ternary liquid-liquid and vapor-liquid-liquid equilibria description
  7. Synthesis, DNA binding, and antimicrobial studies of novel metal complexes containing a pyrazolone derivative Schiff base
  8. Synthesis, spectral and electrochemical study of coordination molecules Cu4OX6L4: 4-cyanopyridine Cu4OBrnCl(6−n)(4-CNpy)4 complexes
  9. Synthesis, spectral and electrochemical study of coordination molecules Cu4OX6L4: 3-cyanopyridine Cu4OBrnCl(6−n)(3-CNpy)4 complexes
  10. Deposition and release of chlorhexidine from non-ionic and anionic polymer matrices
  11. Synthesis of new antimicrobial 4-aminosubstituted 3-nitrocoumarins
  12. Spectroscopic characterization of halogen- and cyano-substituted pyridinevinylenes synthesized without catalyst or solvent
  13. Chemical composition and antimicrobial activity of Erodium species: E. ciconium L., E. cicutarium L., and E. absinthoides Willd. (Geraniaceae)
  14. Photo-Fenton and photo-Fenton-like processes for the degradation of methyl orange in aqueous medium: Influence of oxidation states of iron
  15. Voltammetry of resazurin at a mercury electrode
  16. Effect of dielectric medium on angiotensin converting enzyme inhibitors binding to Zn2+
  17. HPLC analysis of a syrup containing nimesulide and its hydrolytic degradation product
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