饲料用混合油脂在储存过程中氧化情况的研究

Study on the oxidation of feed grade blended oil during storage process

研究旨在观察饲料用混合油脂在储存过程中各氧化指标的变化规律,以得到评价饲料用混合油脂氧化程度的有效衡量指标。试验选用3批次豆油,3批次鱼油,10批次国产饲料用混合油脂以及2批次美国饲料级混合油,在室温下储存120 d,观察酸价、过氧化值、丙二醛值、茴香胺值和水提取物电导率5个指标的变化情况。结果表明,除酸价外其余四个指标都随着油脂储藏时间的延长呈不同程度的上升趋势,其中过氧化值和茴香胺值在饲料用混合油脂储藏过程中变化程度最为明显,试验结果表明,过氧化值和茴香胺值可以用作评价饲料用混合油脂氧化程度的敏感指标。

This article was discussed about peroxidation indexes of feed grade blended oil dur- ing storage time, in order to get effective peroxidation indexes of of feed grade blended oil. This research worked on 3 batches soybean oil, 3 batches fish oil, 10 batches domestic feed grade blended oil and 2 batches U.S. yellow grease. The storage time was 120 d and five peroxidation indexes as follows： acid value, peroxide value, MDA value, anisidine value and water extract conductivity value. The results showed that except for the acid value, other four indexes all pre- sented increasing tendency during the storage period, and moreover, peroxide value and anisi- dine value were more sensitive to reflect the oxidation situation of the feed grade blended oil. The conclusion is that peroxide value and anisidine value are the good peroxidation indexes to show the degree of oxidation of feed grade blended oil.