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Chain-breaking antioxidant activity and cyclic voltammetry characterization of polyphenols in a range of green, oolong, and black teas.
J Agric Food Chem. 2003 Sep 10; 51(19):5798-802.JA

Abstract

A series of eight green, eight oolong, and 17 black teas have been analyzed for polyphenol content by absorbance at 272 nm and cyclic voltammetry response at an inert carbon electrode, a new method developed to provide a rapid measure of easily oxidizable polyphenols in beverages. The chain-breaking antioxidant activity of the teas has also been determined during the chain oxidation of methyl linoleate in a pH 7.4 micellar solution, for which realistic kinetic parameters have been derived. While higher mean values were obtained for green teas than for oolong and black teas, the differences were not large, and the spread of values within each type was considerable. The absorbance at 272 nm correlated well with the cyclic voltammetry response only for green teas and black teas taken on their own. The cyclic voltammetry measure and the antioxidant activity correlated well only for the green teas, where the polyphenol content is dominated by epigallocatechin gallate.

Authors+Show Affiliations

N.N. Semenov Institute of Chemical Physics, Russian Academy of Sciences, Kosygin Street 4, 117977 Moscow, Russia.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

12952436

Citation

Roginsky, Vitaly, et al. "Chain-breaking Antioxidant Activity and Cyclic Voltammetry Characterization of Polyphenols in a Range of Green, Oolong, and Black Teas." Journal of Agricultural and Food Chemistry, vol. 51, no. 19, 2003, pp. 5798-802.
Roginsky V, Barsukova T, Hsu CF, et al. Chain-breaking antioxidant activity and cyclic voltammetry characterization of polyphenols in a range of green, oolong, and black teas. J Agric Food Chem. 2003;51(19):5798-802.
Roginsky, V., Barsukova, T., Hsu, C. F., & Kilmartin, P. A. (2003). Chain-breaking antioxidant activity and cyclic voltammetry characterization of polyphenols in a range of green, oolong, and black teas. Journal of Agricultural and Food Chemistry, 51(19), 5798-802.
Roginsky V, et al. Chain-breaking Antioxidant Activity and Cyclic Voltammetry Characterization of Polyphenols in a Range of Green, Oolong, and Black Teas. J Agric Food Chem. 2003 Sep 10;51(19):5798-802. PubMed PMID: 12952436.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Chain-breaking antioxidant activity and cyclic voltammetry characterization of polyphenols in a range of green, oolong, and black teas. AU - Roginsky,Vitaly, AU - Barsukova,Tatyana, AU - Hsu,Chyong F, AU - Kilmartin,Paul A, PY - 2003/9/4/pubmed PY - 2003/11/13/medline PY - 2003/9/4/entrez SP - 5798 EP - 802 JF - Journal of agricultural and food chemistry JO - J. Agric. Food Chem. VL - 51 IS - 19 N2 - A series of eight green, eight oolong, and 17 black teas have been analyzed for polyphenol content by absorbance at 272 nm and cyclic voltammetry response at an inert carbon electrode, a new method developed to provide a rapid measure of easily oxidizable polyphenols in beverages. The chain-breaking antioxidant activity of the teas has also been determined during the chain oxidation of methyl linoleate in a pH 7.4 micellar solution, for which realistic kinetic parameters have been derived. While higher mean values were obtained for green teas than for oolong and black teas, the differences were not large, and the spread of values within each type was considerable. The absorbance at 272 nm correlated well with the cyclic voltammetry response only for green teas and black teas taken on their own. The cyclic voltammetry measure and the antioxidant activity correlated well only for the green teas, where the polyphenol content is dominated by epigallocatechin gallate. SN - 0021-8561 UR - https://www.unboundmedicine.com/medline/citation/12952436/Chain_breaking_antioxidant_activity_and_cyclic_voltammetry_characterization_of_polyphenols_in_a_range_of_green_oolong_and_black_teas_ L2 - https://dx.doi.org/10.1021/jf030086q DB - PRIME DP - Unbound Medicine ER -