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Fresenius' Journal of Analytical Chemistry

, Volume 365, Issue 8, pp 663–665 | Cite as

Evaluation of a mechanically immobilized nickel hexacyanoferrate electrode as an amperometric sensor for thiosulfate determination

  • D. R. Shankaran
  • S. S. Narayanan
Original paper

Abstract

A nickel hexacyanoferrate modified electrode was constructed by mechanical immobilization. A reversible peak with midpoint potential of 0.38 V was observed in cyclic voltammetry with 0.1 M NaNO3. Electrocatalytic oxidation of thiosulfate was effective on the modified electrode at a significantly reduced overpotential of 0.5 V and at broad pH range. The modified electrode can be used for the determination of thiosulfate in the concentration range of 7.0 × 10–4 to 5.6 × 10–3 M. It has been used for the amperometric determination of thiosulfate in photographic effluents. The results obtained were in good agreement with those obtained by other methods.

Keywords

Oxidation Nickel Immobilization Cyclic Voltammetry NaNO3 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 1999

Authors and Affiliations

  • D. R. Shankaran
    • 1
  • S. S. Narayanan
    • 1
  1. 1.Department of Analytical Chemistry, University of Madras, Guindy Campus, Chennai – 600 025, IndiaIN

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