Manikandan Venkatesh S, Boateng Emmanuel, Durairaj Sharmila, Chen Aicheng
Electrochemical Technology Centre, Department of Chemistry, University of Guelph, 50 Stone Road E, Guelph, ON N1G 2W1, Canada.
Department of Chemistry, Lakehead University, 955 Oliver Road, Thunder Bay, ON P7B 5E1, Canada.
Foods. 2022 May 17;11(10):1448. doi: 10.3390/foods11101448.
4-hydroxy-3-methoxybenzaldehyde (vanillin) is a biophenol compound that is relatively abundant in the world's most popular flavoring ingredient, natural vanilla. As a powerful antioxidant chemical with beneficial antimicrobial properties, vanillin is not only used as a flavoring agent in food, beverages, perfumery, and pharmaceutical products, it may also be employed as a food-preserving agent, and to fight against yeast and molds. The widespread use of vanilla in major industries warrants the need to develop simple and cost-effective strategies for the quantitative determination of its major component, vanillin. Herein, we explore the applications of a selective and sensitive electrochemical sensor (Au electrodeposited on a fluorine-doped reduced-graphene-oxide-modified glassy-carbon electrode (Au/F-rGO/GCE)) for the detection of vanillin. The electrochemical performance and analytical capabilities of this novel electrochemical sensor were investigated using electrochemical techniques including cyclic voltammetry and differential pulse voltammetry. The excellent sensitivity, selectivity, and reproducibility of the proposed electrochemical sensor may be attributed to the high conductivity and surface area of the formed nanocomposite. The high performance of the sensor developed in the present study was further demonstrated with real-sample analysis.
4-羟基-3-甲氧基苯甲醛（香草醛）是一种生物酚化合物，在世界上最受欢迎的调味成分天然香草中含量相对丰富。作为一种具有有益抗菌特性的强大抗氧化化学物质，香草醛不仅用作食品、饮料、香水和药品中的调味剂，还可用作食品防腐剂，以及对抗酵母和霉菌。香草在主要行业的广泛应用使得有必要开发简单且经济高效的策略来定量测定其主要成分香草醛。在此，我们探索了一种选择性和灵敏的电化学传感器（金电沉积在氟掺杂还原氧化石墨烯修饰玻碳电极（Au/F-rGO/GCE）上）用于检测香草醛的应用。使用包括循环伏安法和差分脉冲伏安法在内的电化学技术研究了这种新型电化学传感器的电化学性能和分析能力。所提出的电化学传感器具有出色的灵敏度、选择性和重现性，这可能归因于所形成的纳米复合材料的高导电性和表面积。本研究中开发的传感器的高性能通过实际样品分析得到了进一步证明。
