基于茜素还原氧化石墨烯纳米片修饰电极的水果中硫化物的电化学测定
Electrochemical determination of sulfide in fruits using alizarin-reduced graphene oxide nanosheets modified electrode.
作者信息
Cao Xiaodong, Xu Houchuan, Ding Shun, Ye Yongkang, Ge Xiaoguang, Yu Li
机构信息
School 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.
School of Biotechnology & Food Engineering, Hefei University of Technology, Hefei 230009, China.
出版信息
Food Chem. 2016 Mar 1;194:1224-9. doi: 10.1016/j.foodchem.2015.08.134. Epub 2015 Aug 31.
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.
本研究提出了一种使用茜素（Az）和还原氧化石墨烯（rGO）纳米片修饰的玻碳电极（GCE）快速检测硫化物的新方法。制备的Az-rGO/GCE传感器对硫化物氧化表现出显著的电催化活性。基于循环伏安研究，在0.2M pH 7.0磷酸盐缓冲液中，以+465mV为中心的阳极峰电流与硫化物浓度呈线性关系。线性范围为0.002 - 3.28mM，检测限为1μM。该方法应用于经硫化氢预处理水果中硫化物的测定，并且通过回收率研究对该方法进行了验证。
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