Abstract:

Antioxidative Activity of Extracts from Viola tianshanica Maxim. was measured by Na2S2O3-I2 titrimetric method. The results showed that the antioxidative activities decreased in the order of 85% ethanol solution extracts ＞ acetone extracts ＞ chloroform extracts ＞ ethyl acetates extracts＞ methanol anhydrous extracts ＞n-hexane extracts.The amount of extracts used is directly inproportion to the anti-oxidative effect.When the control experiment was performed by using VC and VE, it is showed that 85% ethanol solution extracts of Viola tianshanica Maxim.(0.5%W/V) have stronger antioxidant activity than 0.02%VC(W/ V), but 0.02%VE(W/V) have no antioxidant activity.

Key words: Viola tianshanica Maxim, extracts, antioxidantive activity