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has been cited by the following article:

• TITLE: Electrochemical Detection of Sudan I Using a Multi-Walled Carbon Nanotube/Chitosan Composite Modified Glassy Carbon Electrode

  AUTHORS: Min Wu, Wanrong Tang, Junlin Guimarães, Qingjiang Wang, Pingang He, Yuzhi Fang

  KEYWORDS: Sudan I; Electrochemical Detection; Chitosan; Multi-Walled Carbon Nanotubes

  JOURNAL NAME: American Journal of Analytical Chemistry, Vol.4 No.6A, June 21, 2013

  ABSTRACT: In this work, a simple and sensitive electrochemical method was developed to determine Sudan I by cyclic voltammetry and differential pulse voltammetry using a glassy carbon electrode modified with a chitosan/carbon nanotube composite. In cyclic voltammetry, Sudan I exhibited a well-defined oxidation peak located at 0.72 V at the multi-walled carbon nanotube (MWCNT)/chitosan-modified GCE. The determination conditions, including pH, scan rate, and chitosan: MWCNT mass ratio at the modified electrode, were optimized. Under the optimum experimental conditions, Sudan I could be linearly detected by differential pulse voltammetry with a detection limit of 3.0 × 10-8 mol?L-1.