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Electrochemical detection of Sudan based on Ni/Graphene modified screenprinted carbon electrode

Published 10/05/2022

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How to Cite
Luong Thi Thuy Dung, Nguyen Anh Tuan, Nguyan Van Thuc, Nguyen Xuan Hoan, Nguyen Xuan Viet. "Electrochemical detection of Sudan based on Ni/Graphene modified screenprinted carbon electrode". Vietnam Journal of Food Control. vol. 5, no. 3, pp. 542-552, 2022

Main Article Content


In the work reported here, the simple and efficient modification of Ni nanoparticles /reduced graphene (rGO) on the surface of the screen-printed carbon electrode (SPCE) was demonstrated. The obtained composited materials were characterized by physicochemical methods such as SEM and electrochemical techniques. The results show that the Ni nanoparticles are uniformly distributed on the surface of the reduced graphene material with the particle size from 10 - 20 nm. The electrochemical properties show that the Ni/rGO/SPCE material exhibits high electron exchange ability in 0.1 M KOH media. In addition, the Ni/rGO composited material modified SPCE to form a Sudan electrochemical sensor. The sensor has high sensitivity (9.13 µA. µM-1.cm-2), wide dynamic range (300 nM - 35,000 nM) and low limit of detection - LOD (171.8 nM (3*σ). The combination of a miniaturized 3-electrode system (12.5 mm x 4 mm x 0.3 mm) with a highly electrochemical activity of Ni/rGO composited material pave the prospect for the creation of a new type of electrical sensor: compact, high sensitivity in the analysis of Sudan I in particular and in the analysis of banned substances in food in general.



Electrochemical sensor, Sudan I, Nickel/graphene, food safety, disposable three-electrode system.


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