Electrochemical determination of sulfide in fruits using alizarin-reduced graphene oxide nanosheets modified
Xiaodong Cao1, Houchuan Xu2, Shun Ding2
1School of Biotechnology & Food Engineering, Hefei University of Technology, Hefei 230009, China; Wanjiang Institute of Poultry Technology, Hefei University of Technology, Xuancheng Campus, Xuancheng 242000, China.
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.
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