3.2. Evaluation of total antioxidant capacity of tea extracts by off-line
DPPH assay
DPPH radical scavenging capacities of tea samples were shown in
Table 1. The antioxidant activities of different tea samples were
compared with that of Trolox, and were expressed as mM of Trolox
equivalent per g of dry weight. The Trolox equivalents among the
different tea samples ranged from 1321 mM Trolox for Milanxiang
(S11) to 2550 mM Trolox for Xinyangmaojian (S6), showing a 1.9
fold difference in antioxidant activity.