期刊
ANTIOXIDANTS
卷 8, 期 11, 页码 -出版社
MDPI
DOI: 10.3390/antiox8110523
关键词
antioxidant index; differential pulse voltammetry; polyphenols; index correlation; structure-activity
资金
- Spanish Ministry of Science, Innovation and Universities [CTM2017-85346-R]
- Generalitat de Catalunya [2017 SGR 312]
This paper evaluates the antioxidant ability of polyphenols as a function of their chemical structures. Several common food indexes including Folin-Ciocalteau (FC), ferric reducing antioxidant power (FRAP) and trolox equivalent antioxidant capacity (TEAC) assays were applied to selected polyphenols that differ in the number and position of hydroxyl groups. Voltammetric assays with screen-printed carbon electrodes were also recorded in the range of -0.2 to 0.9 V (vs. Ag/AgCl reference electrode) to investigate the oxidation behavior of these substances. Poor correlations among assays were obtained, meaning that the behavior of each compound varies in response to the different methods. However, we undertook a comprehensive study based on principal component analysis that evidenced clear patterns relating the structures of several compounds and their antioxidant activities.
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