TITLE

Optimization of Ultrasonic Extraction of Phenolic Antioxidants from Green Tea Using Response Surface Methodology

AUTHOR(S)
Lan-Sook Lee; Namhyouck Lee; Young Ho Kim; Chang-Ho Lee; Sang Pil Hong; Yeo-Won Jeon; Young-Eon Kim
PUB. DATE
November 2013
SOURCE
Molecules;Nov2013, Vol. 18 Issue 11, p13530
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Response surface methodology (RSM) has been used to optimize the extraction conditions of antioxidants with relatively low caffeine content from green tea by using ultrasonic extraction. The predicted optimal conditions for the highest antioxidant activity and minimum caffeine level were found at 19.7% ethanol, 26.4 min extraction time, and 24.0 °C extraction temperature. In the predicted optimal conditions, the experimental values were very close to the predicted values. Moreover, the ratio of (EGCg + ECg)/EGC was identified a major factor contributing to the antioxidant activity of green tea extracts. In this study, ultrasonic extraction showed that the ethanol concentration and extraction time used for antioxidant extraction could be remarkably reduced without a decrease in antioxidant activity compared to the conventional extraction conditions.
ACCESSION #
92615444

 

Related Articles

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics