Abstract:Dihydroquercetin mannich salt, a sihydroquercetin derivative, was prepared via mannich reaction. Its capability of scavenging the free radicals and antioxidant ability in KI-H2O2 system and lard were all studied. The results showed that the solubility of dihydroquercetin mannich salt in water was higher than that of dihydroquercetin. Its capability of scavenging the DPPH radicals was also improved. Besides, its antioxidant activity in KI-H2O2 system was better than those of dihydroquercetin, quercetin and vitamin C. Its antioxidant activity in lard was higher than that dihydroquercetin, but lower than that of BHT. The optimal amount of dihydroquercetin mannich salt in lard was 2.0 mmol/L.
