复配抗氧化剂和新型贮油桶对鱼油抗氧化影响

以深海鱼油为对象,通过60℃加速氧化实验,筛选出以L-抗坏血酸棕榈酸酯(AP)、茶多酚和柠檬酸为组分的复配抗氧化剂,比例为AP:茶多酚:柠檬酸=2:1:1(w/w),复配抗氧化剂的抗氧化效果比BHA、BHT、茶多酚和生育酚要显著。通过研究温度和添加量对抗氧化效果的影响,结果表明,抗氧化效果随添加量的增加以及储藏温度的降低而增强,20℃时最佳添加量为0.06%,4℃时为0.02%。结合新型贮油桶添加0.06%的复配抗氧化剂,20℃贮藏360d后,鱼油的POV为2.85mmol/kg、TBA值为1.87nmol/g,比普通贮油桶的抗氧化效果要显著。

Compound antioxidant and new storage tank for fish oil

The compound antioxidant for fish oil was prepared through accelerating oxidation experiment under 60 ℃.It was composed of L-ascorbic acid palmitate(AP),tea polyphenols and citric acid,and the ratio was 2:1:1(w/w).The compound antioxidant could delay the oxidation of fish oil,which was better than BHA,BHT,tea polyphenols and tocopherols.The results showed that its antioxidation effect could be enhanced by increasing of dose and decreasing the storage temperature.And the optimal dose of compound antioxidant was 0.06% under 20 ℃,0.02% under 4 ℃.Combined with different oil tanks,each of them was added 0.06% compound antioxidant.It turned out that the antioxidation effect of new storage tank was much more effective than normal storage tank.The POV of fish oil was 2.85 mmol/kg and TBA was 1.87 nmol/g after storing for 360 d under 20 ℃.