Abstract: This paper determined the changing of color difference, MDA value, total antioxidant activity and the deposit of catechins in duck thigh meat by adding different catechins. The results showed that adding different catechins obviously changed the L* value of the duck thigh meat and adding different concentration of catechins had different relationship on the L*, a* and b* value respectively. Adding 500βmg/kg EGCg and catechin complex got the best color. Adding EGCg and catechin complex lowered the MDA and decreased the T-AOC which had relationship with the deposit of catechins. The best adding account of EGCg and catechin complex were 800βmg/kg or 1β000βmg/kg and 500βmg/kg or 1β000βmg/kg respectively. Catechin complex got the better efficiencies than EGCg in the all detected items.

Key words: catechins, color difference, antioxidant, MDA, T-AOC