ANTIOXIDANT ACTIVITY OF PHENOLIC EXTRACTS FROM BLACK TEA

Authors

  • Amira M Albaldawi Food Sci. and Biotechnology Department, College of Agriculture-Unit of Baghdad.
  • Rukaibaa A Chechan Food Sci. and Biotechnology Department, College of Agriculture-Unit of Baghdad.

Keywords:

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Abstract

Phenolic compounds extracts from black tea (obtained from local markets) were extracted byhot and cold methods to test their antioxidant activity by determination of thiobarbituric acid No.(TBA%). Effect of different concentrations( 0.02, 0.04, 0.08 ) % of extracts and time of incubation(30days) at 40 C were studied, hot method phenolic extract(S2)gave a positive concentration effecton antioxidant activity, cold method phenolic extract ( S1 ) gave a limited concentration effect.S1 and S2 gave continuous decrease in TBA % after different periods of incubation time, S2showed higher antioxidant activity than S1,S1 and S2 antioxidant activity were compared withsynthetic antioxidants BHA and BHT and natural antioxidant activity -Tocopherol.S1 and S2 gavehigher activity than BHA and BHT on the other hand -Tocopherol showed inhibition inantioxidant activity.

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Published

2010-09-01

Issue

Vol. 13 No. 3 (2010): September

Section

Articles

How to Cite

(1)
ANTIOXIDANT ACTIVITY OF PHENOLIC EXTRACTS FROM BLACK TEA. ANJS 2010, 13 (3), 99-103.