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

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