Electrochemical determination of sulfide in fruits using alizarin-reduced graphene oxide nanosheets modified electrode

Food Chem. 2016 Mar 1:194:1224-9. doi: 10.1016/j.foodchem.2015.08.134. Epub 2015 Aug 31.

Abstract

This study presents a new approach for rapid detection of sulfide using a glassy carbon electrode (GCE) modified with alizarin (Az) and reduced graphene oxide (rGO) nanosheets. The fabricate Az-rGO/GCE sensor shows a notable electrocatalytic activity to sulfide oxidation. The currents of anodic peak centered at +465mV in 0.2M pH 7.0 phosphate buffer were related linearly to the concentrations of sulfide, based on the cyclic voltammetric studies. The linear range was 0.002-3.28mM, and the detection limit was 1μM. The proposed method was applied in sulfide determination of hydrogen sulfide pretreated fruits, and the method was also verified with recovery studies.

Keywords: Alizarin; Electrochemical detection; Reduced graphene oxide nanosheets; Sulfide.

Publication types

  • Evaluation Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Anthraquinones / chemistry
  • Electrochemical Techniques / instrumentation
  • Electrochemical Techniques / methods*
  • Electrodes
  • Food Contamination / analysis
  • Fruit / chemistry*
  • Graphite / chemistry
  • Limit of Detection
  • Oxidation-Reduction
  • Oxides / chemistry
  • Sulfides / analysis*

Substances

  • Anthraquinones
  • Oxides
  • Sulfides
  • alizarin
  • Graphite