石墨烯
罗丹明B
罗丹明
电化学气体传感器
分析物
氧化物
材料科学
检出限
纳米复合材料
制作
电化学
纳米技术
分析化学(期刊)
色谱法
化学
荧光
冶金
光学
电极
有机化学
物理
物理化学
光催化
医学
替代医学
病理
催化作用
出处
期刊:Analytical Methods
[The Royal Society of Chemistry]
日期:2023-01-01
卷期号:15 (41): 5500-5509
摘要
Developing a sensitive portable sensor for the determination of food additives is very important. Herein, a simple and sensitive electrochemical sensor has been constructed based on a carbon paste electrode (CPE) modified with graphene oxide (GO) nanosheets for the simultaneous determination of sunset yellow (SY) and rhodamine B (RhB) in phosphate buffer solution (pH = 4). The cyclic and differential pulse voltammetry (CV and DPV) results revealed two well-resolved anodic peaks for SY and RhB with a remarkable increase in oxidation signals of these colorants. Based on this, an electrochemical method was developed for the first time for the simultaneous detection of SY and RhB. Applicability of the sensor was confirmed in various concentrations of two analytes in two linear ranges of 1-20 μM for SY and 1-30 μM for RhB with a limit of detection (LOD) of 10.0 nM and 20.0 nM, respectively. Furthermore, the proposed sensor was successfully employed for the simultaneous detection of SY and RhB in food samples with recoveries of 93.1-106.0% indicating promising potential in practical application.
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