Zinc oxide nanoparticles modified-carbon paste electrode used for the electrochemical determination of Gallic acid.

Chikere, C.; Faisal, N.H.; Kong Thoo Lin, P.; Fernandez, C.

Abstract

Zinc oxide nanoparticles (nano-ZnO) was used to modify carbon paste electrode (CPE) for a fast and sensitive electrochemical determination of gallic acid (GA). The study was carried out using cyclic voltammetry (CV) and differential voltammetry (DPV) techniques, where the nano-ZnO-modified electrode exhibited an efficient and sensitive oxidation of GA. The cyclic voltammetric result showed a significant enhancement of the peak current from 250μA to about 410μA. The electrochemical behaviour of GA on the nano-ZnO modified carbon paste electrode was studied using DPV, showing a sensitivity of the electrode in a concentration range of 1 x 10−6 to 5.0 x 10−5 mol L−1, with a correlation coefficient R2 of 0.9968 and a limit of detection of 1.86 x 10−7 mol L−1 (S/N =3). The proposed electrode was used successfully for the determination of GA in red wine with recoveries of 103%.

Citation

CHIKERE, C., FAISAL, N.H., KONG THOO LIN, P. and FERNANDEZ, C. 2019. Zinc oxide nanoparticles modified-carbon paste electrode used for the electrochemical determination of Gallic acid. Journal of physics: conference series [online], 1310: proceedings of 2018 Applied nanotechnology and nanoscience international conference (ANNIC 2018), 22-24 October 2018, Berlin, Germany, article ID 012008. Available from: https://doi.org/10.1088/1742-6596/1310/1/012008

• Presentation Conference Type: Conference Paper (published)
• Conference Name: 2018 Applied nanotechnology and nanoscience international conference (ANNIC 2018)
• Acceptance Date: Aug 6, 2019
• Online Publication Date: Oct 8, 2019
• Publication Date: Oct 8, 2019
• Deposit Date: Oct 11, 2019
• Publicly Available Date: Oct 11, 2019
• Journal: Journal of physics: conference series
• Print ISSN: 1742-6588
• Electronic ISSN: 1742-6596
• Publisher: IOP Publishing
• Peer Reviewed: Peer Reviewed
• Volume: 1310
• Article Number: 012008
• DOI: https://doi.org/10.1088/1742-6596/1310/1/012008
• Keywords: Zinc oxide nanoparticles; Gallic acid; Cyclic voltammetry; Differential pulse voltammetry; Electrochemistry
• Public URL: https://rgu-repository.worktribe.com/output/641735