Catechin composition and antioxidant capacity of green teas in Chuzhou

UPLC was applied to analyze the catechin composition in seven varieties of green teas,and their antioxidant capacity was further evaluated by TEAC assay. Results showed that green teas in Chuzhou were rich in catechin and Yang Chun Bai Xue first level tea possessed the highest content of catechin,which was78.93 mg/g. The content of EGCG of green teas ranged from 24.28 to 33.89 mg/g and it was the most abundant catechin monomer in Chuzhou green teas. In addition,Chuzhou green teas also exhibited high levels of GC,EGC and ECG. Furthermore,the content of total catechin,EGCG,and ECG revealed high significant correlation with antioxidant activity of green teas.