声致化学发光法测定茶叶的抗活性氧能力

Sonochemiluminescence determination of scavenging active oxygen of tea extract

利用流动-学发光方法,研究了五种茶叶在不同冲泡水温、冲泡时间及冲泡次数等条件下,茶汤的抗活性氧能力,考察了隔夜茶汤抗活性氧能力的变化.实验结果表明,冲泡茶叶的最佳条件为冲泡水温96℃,冲泡时间为30 min,冲泡次数最多三次.五种茶叶茶汤抗活性氧能力由高到低顺序为紫阳毛尖>乌龙茶>寿眉>祁门红茶>普洱茶.

Various factors including extracting temperature,extracting time and times of extraction,that affect on the anti-reactive oxygen species（ROS） capacity of extracted tea from five kinds tea are investigated by the flow-sonochemiluminescence method.Experiment results show that the optimum tea infusing condition are： 96℃ water,30 minutes infusing time and three times infusing frequency.Order in anti-ROS capcity of studied teas is Ziyang maojian〉Oolong tea〉Shou mei〉Keemun black tea〉Pu′er tea.