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Electropolymerized Eugenol‐MWNT‐Based Electrode for Voltammetric Evaluation of Wine Antioxidant Capacity
Author(s) -
Ziyatdinova Guzel,
Kozlova Ekaterina,
Budnikov Herman
Publication year - 2015
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201400712
Subject(s) - wine , chemistry , catechin , differential pulse voltammetry , antioxidant , eugenol , nuclear chemistry , redox , resveratrol , electrode , cyclic voltammetry , chromatography , organic chemistry , polyphenol , electrochemistry , food science , biochemistry
Eugenol electropolymerization conditions on multiwalled carbon nanotube based glassy carbon electrode (MWNT/GCE) have been found. The polyeugenol/MWNT/GCE shows reversible redox steps of o ‐quinone fragment in acidic media. Natural phenolic antioxidants are oxidized on polyeugenol/MWNT/GCE at 0.52 V excluding resveratrol (0.62 V). Differential pulse voltammetry on polyeugenol/MWNT/GCE was applied for the evaluation of wine antioxidant capacity (AOC). The AOC was expressed in catechin equivalents per 1 L of wine. The linear dynamic range is 1.00–250 µM with LOD and LOQ of 0.21 and 0.71 µM of catechin, respectively. Positive correlations for AOC with antioxidant activity ( r= 0.9840) and total phenolics content ( r= 0.9944) were observed.