Characterization of plant phenolic compounds by cyclic voltammetry

Autor:	Olga V. Koroleva, Elena V. Stepanova, B.A Kuznetsov, Iakovleva Ke, S. A. Kurzeev, Tatyana V. Fedorova
Rok vydání:	2007
Předmět:	chemistry.chemical_compound Antioxidant capacity Cation radical ABTS chemistry Polyphenol education Trolox equivalent antioxidant capacity food and beverages Organic chemistry Cyclic voltammetry Applied Microbiology and Biotechnology Biochemistry
Zdroj:	Applied Biochemistry and Microbiology. 43:661-668
ISSN:	1608-3024 0003-6838
Popis:	Phenolic acids and flavonoids were characterized by cyclic voltammetry and total antioxidant activity in the reaction with the ABTS cation radical. Anode peak voltages (Eap) and their pH dependences were determined for the studied phenolic acids and flavonoids. The Eap and Trolox equivalent antioxidant capacity (TEAC) values were found to correlate for polyphenols, which react with the ABTS cation radical in two steps. Correlation between the half-wave potential (E1/2) and TEAC was determined for electrochemically irreversible compounds. Mechanisms of the reaction of phenolics on the electrode involving one-and two-electron oxidation are proposed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::235801a0b736b40ab16185f812660298 https://doi.org/10.1134/s0003683807060166 Zobrazit plný text záznamu Plný text ve formátu PDF