摘要
目的评价4类不同发酵类型16种茶叶样品总抗氧化能力。方法采用氧自由基吸收能力(oxygen radical absorbance capacity,ORAC)法。结果闽红茶样品ORAC值最高,为1379.1μmol TE/g,其次为乌龙茶水仙,其ORAC值为1270.7μmol TE/g,第三位绿茶品种的古丈毛尖,其ORAC值为1247.1μmol TE/g。绿茶样品整体均具有较高的ORAC值,但4类茶叶的ORAC值无统计学差异(P>0.05)。结论 4类茶叶样品均具有一定的抗氧化活性,但尚不能认为不同种类茶叶的ORAC值不同。
Objective To study the antioxidant activities of 16 kinds of tea Methods Oxygen radical absorbance capacity (ORAC) method was used. Results The top three average ORAC value were 1379.1μmol TE/g of Fujian tea, 1270.7μmol TE/g of oolong tea, and 1247.1μmol TE/g of Guzhang maojian tea. The green tea had a higher ORAC value. There was no statistical difference in ORAC values of four kinds of tea (P>0.05), Conclusion All the 16 kinds of tea under different concentrations had free radical scavenging ca-pacity, and it is not sure that the ORAC value of different kinds of tea is different.
出处
《食品安全质量检测学报》
CAS
2014年第1期241-246,共6页
Journal of Food Safety and Quality
基金
国家科技支撑计划项目(2012BAD33B01)
北京市科学技术研究院青年骨干项目(2012-019)~~
关键词
ORAC值
绿茶
乌龙茶
红茶
黑茶
抗氧化活性
oxygen radical absorbance capacity
green tea
oolong tea
black tea
antioxidant activity
