鱼油不饱和脂肪酸的自由基氧化规律

从东海小杂鱼鱼油中鉴定出43种脂肪酸，主要16种脂肪酸占总脂肪酸95．01％。测定了鱼油加入自由基后在不同的时间及不同光照条件下的脂肪酸的氧化规律，并进行分析发现无论在光照还是避光条件下所有不饱和脂肪酸都随着时间的推移，含量都有下降的趋势，说明不断的被氧化，特别是EPA、DHA被氧化的更快。在光照条件下鱼油中的脂肪酸氧化比在避光条件下要快。在实验过程中，通过在鱼油加入自由基后再加入不同的抗氧化剂，利用TBA值的测定，筛选出对鱼油中的脂肪酸氧化有较好的抗氧化性的各种抗氧化剂的有效浓度。同时可以发现4-己雷琐辛的抗氧化性最强，由于此实验中用的TBHQ是食品级的，因此BHA的抗氧化性比TBHQ强。并且对鱼油在添加抗氧化剂前后脂肪酸的自由基氧化规律进行比较。

Fish Oil Unsaturated Fatty Acids of the Law of Free Radical Oxidation

Forty three fatty acids of fish oil were identified by GC-MS extracted from little miscellaneous fish in East China Sea,the major 16 fatty acids account for 95.10% of total fatty acid content.The oxidation changes of fish oil were determined by adding free radical under different time and differet illumination terms. The results showed that ghe content of fatty acids decrease at both conditions,however,fast in decrease and high TBA walue obtained in the illuminated conditions.Most significantly,EPA and DHA ...