Abstract: This study focused on the analysis of total phenolics and antioxidative activities in speciality tea including YongXiHuoqing,TaQuanYunWu,JingTingLvXue and XiKouYunJian of Xuancheng city by Folin-Ciocalteu colorimetric method,DPPH and ABTS methods.Moreover,the difference of the total phenols and antioxidative activities for JingTingLvXue at different picking times were investigated and the effects of processing on tea polyphenols were discussed using HPLC-MS.The results showed that YongXiHuoQing contained much more tea polyphenols (161 mg catechin/g dry weight),XiKouYunJian just 127 mg catechin/g dry weight.YongXiHuoQing showed the highest antioxidant activity by ABTS and DPPH methods.Tea polyphenols content and antioxidant activities were increased when picked after Qingming festival.The content of tea polyphenols was increased and caffeine was decreased after tea producing process.

Key words: Xuancheng, green tea, tea polyphenols, antioxidant activity, picking time