Amperometric Determination of Ascorbic Acid and Riboflavin Using Ferrocene/Thionin Bimediator Modified Electrode

Authors

  • M. Devendiran  Department of Analytical Chemistry, University of Madras, Guindy Campus, Chennai, Tamil Nadu, India
  • K. Krishna Kumar  Department of Analytical Chemistry, University of Madras, Guindy Campus, Chennai, Tamil Nadu, India
  • S. Sriman Narayanan  Department of Analytical Chemistry, University of Madras, Guindy Campus, Chennai, Tamil Nadu, India

Keywords:

Amperometry, Bimediator, Ascorbic acid, Riboflavin

Abstract

A bimedaitor modified electrode composed of ferrocene monocarboxylic acid covalently linked to thionin was developed for the amperometric determination of ascorbic acid and riboflavin. The bimeditor molecule was characterized with FTIR spectroscopy and the electrochemical behaviour of the bimediator modified electrode was studied using cyclic voltammetry. Ferrocene present in the bimediator favoured the electrocatalytic oxidation of ascorbic acid and thionin favoured the electrocatalytic reduction of the riboflavin both in static and dynamic conditions. From the amperometric studies, a linear range for the oxidation of ascorbic acid from 23 ?M to 138 ?M with a correlation coefficient of 0.9875 and for the reduction of riboflavin from 9.90 ?M to 94.20 ?M with a linear regression coefficient of 0.9864 was observed with the bimediator modified electrode.

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International Journal of Scientific Research in Science and Technology

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Published

2018-02-28

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Volume 4, Issue 5, March-April-2018

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Research Articles

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How to Cite

[1]
M. Devendiran, K. Krishna Kumar, S. Sriman Narayanan, " Amperometric Determination of Ascorbic Acid and Riboflavin Using Ferrocene/Thionin Bimediator Modified Electrode, International Journal of Scientific Research in Science and Technology(IJSRST), Online ISSN : 2395-602X, Print ISSN : 2395-6011, Volume 4, Issue 5, pp.628-634, March-April-2018.