To evaluate the antioxidant activity of tea polyphenols in Shuichengchun green tea under optimal brewing condi-tions.Using commercially available Shuichengchun green tea as raw material,the response surface methodology was used to opti-mize brewing conditions of polyphenols,and the scavenging rates of DPPH·and ABTS+·were measured.The results showed that the optimal brewing conditions for Shuichengchun green tea were 3 times,with a tea addition of 0.554 2 g in 100 mL of water,a brewing time of 12 minutes,and a brewing temperature of 92℃.Under the conditions,the dissolution rate of tea polyphenols was 14.52%,which was close to the predicted value of 14.60%.The extraction rate of tea polyphenols reached 73.33%.The scaveng-ing rate of DPPH·and ABTS+·are 90.23%and 91.80%when the concentration of polyphenols is 16.18 μg/mL.It can be inferred that the polyphenols in Shuichengchun green tea have better scavenging abilities for DPPH·and ABTS+·than Vc solutions of the same concentration.Therefore,Shuichengchun green tea has good antioxidant activity.
Shuichengchun green teatea polyphenolsbrewing conditionsantioxidant activity
国家科技期刊平台
NSTL
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