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Highly Sensitive Voltammetric Sensor for Determination of Ascorbic Acid Using Graphite Screen Printed Electrode Modified With Zno/Al2o3 Nanocomposite Publisher



Ganjali MR1, 2 ; Nejad FG3 ; Beitollahi H4 ; Jahani S4 ; Rezapour M5 ; Larijani B6
Authors
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Authors Affiliations
  1. 1. Center of Excellence in Electrochemistry, University of Tehran, Tehran, Iran
  2. 2. Biosensor Research Center, Endocrinology and Metabolism Molecular-Cellular Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
  3. 3. Department of Chemistry, Graduate University of Advanced Technology, Kerman, Iran
  4. 4. Environment Department, Institute of Science and High Technology and Environmental Sciences, Graduate University of Advanced Technology, Kerman, Iran
  5. 5. IP Department, Research Institute of the Petroleum Industry (RIPI), P.O. Box 14665-137, Tehran, Iran
  6. 6. Diabetes Research Center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran

Source: International Journal of Electrochemical Science Published:2017


Abstract

A sensitive and selective voltammetric sensor based on graphite screen printed electrode modified by ZnO/Al2O3 nanocomposite for the detection of ascorbic acid has been successfully developed. The electrochemical behavior of prepared electrode for the determination of ascorbic acid was systematically investigated by cyclic voltammetry (CV) and differential pulse voltammetry (DPV). Under optimum conditions, the modified electrode exhibits linear responses to ascorbic acid in the ranges 1.0-100 μM, with detection limits (S/N = 3) calculated to be 0.6 μM. Finally, the developed sensor was successfully applied to the detection of ascorbic in real samples. © 2017 The Authors.