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Screening of Brazilian plant extracts for antioxidant activity by the use of DPPH free radical method
Author(s) -
Mensor Luciana L.,
Menezes Fábio S.,
Leitão Gilda G.,
Reis Alexandre S.,
Santos Tereza C. dos,
Coube Cintia S.,
Leitão Suzana G.
Publication year - 2001
Publication title -
phytotherapy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.019
H-Index - 129
eISSN - 1099-1573
pISSN - 0951-418X
DOI - 10.1002/ptr.687
Subject(s) - dpph , rutin , antioxidant , traditional medicine , chemistry , ethyl acetate , ethanol , organic chemistry , food science , medicine
Brazilian plant extracts belonging to 16 species of 5 different families (71 extracts) were tested against the stable DPPH (2,2‐diphenyl‐1‐picryl‐hydrazyl‐hydrate) free‐radical. The ability to scavenge DPPH radical was measured in these experiments by the discoloration of the solution. Ginkgo biloba and rutin, commonly used as antioxidants for medical purposes, were used as standards. Based on our results, we can say that as a general rule the ethanol extracts of plants belonging to the Verbenaceae family showed lower EC 50 values than the other plant extracts. Among the partitions, the more polar ones (ethyl acetate and n ‐butanol) are those that generally have higher antioxidant activity (AA). Copyright © 2001 John Wiley & Sons, Ltd.