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Electroanalytical determination of gallic acid in red and white wine samples using cobalt oxide nanoparticles-modified carbon-paste electrodes.

Chikere, Chrys O.; Hobben, Emma; Faisal, Nadimul Haque; Kong-Thoo-Lin, Paul; Fernandez, Carlos

Authors

Chrys O. Chikere

Emma Hobben

Paul Kong-Thoo-Lin

Carlos Fernandez



Abstract

Beverages like wines, have exhibited high level of antioxidant capacity, specifically from compounds like Gallic acid (GA) and their derivatives. GA has shown great importance in the food industry and pharmaceutical industry as a food additive, anti-tumour, anti-viral, and anti-mutagenic agent. Red and white wines from the USA and Australia were electrochemically analysed for GA, using Cobalt oxide nanoparticles modified carbon paste electrode (CoO-NPs-CPE). The electrochemical studies demonstrated an efficient GA (10 mmol L-1) oxidation, with enhanced peak currents from 302 µA to about 405 µA (25 % increase). The limit of detection (LOD) of the modified electrode was 1.52 x 10-4 mmol L-1 within the concentration range of 1 x 10-4 to 1 x 10-3 mmol L-1. The CoO-NPs-CPE was successfully used, for the quantitative analysis of GA in red and white wine, showing average recoveries of 97% and 101% respectively. Hence our electrode can be applied for GA quantification in wine matrices.

Citation

CHIKERE, C.O., HOBBEN, E., FAISAL, N.H., KONG-THOO-LIN, P. and FERNANDEZ, C. 2020. Electroanalytical determination of gallic acid in red and white wine samples using cobalt oxide nanoparticles-modified carbon-paste electrodes. Microchemical journal [online], 160(part B), article ID 105668. Available from: https://doi.org/10.1016/j.microc.2020.105668

Journal Article Type Article
Acceptance Date Oct 21, 2020
Online Publication Date Oct 27, 2020
Publication Date Jan 31, 2021
Deposit Date Nov 5, 2020
Publicly Available Date Oct 28, 2021
Journal Microchemical journal
Print ISSN 0026-265X
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 160
Issue part B
Article Number 105668
DOI https://doi.org/10.1016/j.microc.2020.105668
Keywords Cobalt oxide nanoparticles; Carbon paste electrode; Phenolic acids; Gallic acid; Wine samples
Public URL https://rgu-repository.worktribe.com/output/979569