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

卷:194

Cao, Xiaodong ; Xu, Houchuan ; Ding, Shun ; Ye, Yongkang ; Ge, Xiaoguang ; Yu, Li

Hefei Univ Technol

关键词: Sulfide;    Reduced graphene oxide nanosheets;    Alizarin;    Electrochemical detection;   

DOI  :  10.1016/j.foodchem.2015.08.134

学科分类：食品科学和技术

【 摘 要 】

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 +465 mV in 0.2 M pH 7.0 phosphate buffer were related linearly to the concentrations of sulfide, based on the cyclic voltammetric studies. The linear range was 0.002-3.28 mM, and the detection limit was 1 mu M. The proposed method was applied in sulfide determination of hydrogen sulfide pretreated fruits, and the method was also verified with recovery studies. (C) 2015 Elsevier Ltd. All rights reserved.