AAPH scavenging activities of 22 flavonoids and phenolic acids and 9 extracts of Chinese materia medica / 中国中药杂志
China Journal of Chinese Materia Medica
;
(24): 2296-2302, 2010.
Article
in Chinese
| WPRIM
| ID: wpr-262172
ABSTRACT
<p><b>OBJECTIVE</b>To investigate the AAPH scavenging activities of 22 flavonoids and phenolic acids and 9 extracts of Chinese materia medica.</p><p><b>METHOD</b>The antioxidant activities of the samples were evaluated by an oxygen radical absorbance capacity method (ORAC), at the same time, the total contents of flavonoids and phenolic the 9 herb extracts were analyzed by Folin-Ciocalteu method, and the active components were qualitatively and quantitatively analyzed by an HPLC method.</p><p><b>RESULT</b>It was found that the tea extract showed the strongest AAPH activity with the ORAC value of 4786.40 micromol x g(-1) whereas safflower demonstrated the weakest activity with the ORAC value of 784.04 micromol x g(-1). As for compounds, quercetin had the strongest AAPH activity with the ORAC value of 12.90 while ( - )-EGC had the weakest activity with the ORAC value of 2.47. A quantitative relationship was obtained to describe the AAPH scavenging activity of the herb extracts Y = 1844.8 lnX-3577.5, r = 0.8675, where Y stands for the ORAC vaule, and X stands for the concentration of total phenolic acids.</p><p><b>CONCLUSION</b>Flavonoids and phenolic acids are the AAPH scavenging active ingredients in the Chinese herb extracts. It's a good way to study the antioxidant activity of Chinese herb extract and its chemical composition by combing ORAC method and HPLC method.</p>
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Plants, Medicinal
/
Flavonoids
/
Drugs, Chinese Herbal
/
Materia Medica
/
Chemistry
/
Free Radical Scavengers
/
Amidines
/
Hydroxybenzoates
Language:
Chinese
Journal:
China Journal of Chinese Materia Medica
Year:
2010
Type:
Article
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