Electrochemical Measurement of Β-Nicotinamide Adenine Dinucleotide by ZrO2 Modified Carbon Paste Electrode

Document Type : Original Article

Authors

Department of Chemistry, Faculty of Science, Yazd University, Yazd, Iran

Abstract

In this research, the electrochemical performance of carbon paste electrode modified with 4-(3,5-dimethyl-1,4,7,8-tetrahydrodipyrazolo[3,4-b: 4', 3'-e] pyridin-4-yl)benzene-1, 3-diol (DBC) and zirconium dioxide nanoparticles (ZrO2) are investigated for the electrocatalytic oxidation of β-nicotinamide adenine dinucleotide (NADH). The kinetic parameters, transfer coefficient (α), and apparent charge transfer rate constant (ks) were obtained 0.31 and 4.83 s-1, respectively by the cyclic voltammetry (CV) technique. The anodic peak potential of the DBC modifier depends on pH and has a linear range with a slope of 0.047 V/pH. Also, the performance of the modified electrode in the electrocatalytic oxidation of NADH is investigated. It was observed that in the presence of the modifier, the overvoltage related to the oxidation of NADH decreases significantly and its oxidation potential decreases by about 300 mV. Also, the diffusion coefficient (D) between the species and the electrode surface was calculated (D=1.93×10-6 cm2 s-1) using the chronoamperometric method. Using the differential pulse voltammetry method (DPV), the detection limit of 5.8 nM was acquired. Two linear concentration ranges of 0.01-1.0 µM and 1.0-350.0 µM for NADH were obtained. The modified electrode was used to quantitatively analyze NADH in the blood serum sample. Also, this electrode can be acceptably utilized for the simultaneous measurement of NADH and ascorbic acid species.

Keywords

Main Subjects

Analytical and Bioanalytical Electrochemistry
Volume 15, Issue 9 - Serial Number 9
September 2023
Pages 726-738

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History

  • Receive Date: 18 May 2023
  • Revise Date: 21 September 2023
  • Accept Date: 24 September 2023

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