对鱼油的提取工艺、鱼油的功能性研究和市场开发进行了综述,鱼油中DHA和EPA含量较高,具有很高的营养价值和很好的开发利用前景。以罗非鱼加工下脚料提取鱼油不仅能提高罗非鱼产品的附加值,而且还能促进罗非鱼养殖加工产业良性发展,具有重要的经济价值和现实意义。

Fish oil was extracted from Tilapia byproduct by hydrolysis,regarding the extraction rate of crude fish oil as the experimental indexes.The optimum Alcalase hydrolysis condition was studied by using orthogonal experiment.The results showed the following optimal conditions:collagen was heated directly for 2 h at pH 7.5 and 55℃by added alcalase enzyme 1 750 U/g of collagen(solid to liquid was 1:2).Under these conditions extraction rate offish oil was 12.56%.the sentry evaluation was carried and the physical and chemical indicators are conducted of fish oil extracted.The results show that the crude fish oil with light fishiness was reddish brown and slightly turbid.Water and volatile matter concentration was 0.42%.The acid value of fish oil extracted was 9.29 mg/g,the peroxide value of fish oil was 8.35 mmol/kg.The iodine value was 135.87 g/(100 g).The impurity content was 0.32%.The physics and chemistry indexes achieved to the second crude fish oil in standard specifications of the aquatic products.

为牟取暴利经营者在水发水产品在加工过程中,往往加入国家明令禁止的非食品添加剂改变水发水产品的外观,诱引消费者购买,不仅损害了消费者的利益,对消费者的健康也构成了威胁。水发水产品的主要不合格项为:甲醛超标、重金属超标、pH值过高、双氧水超标,消费者可以通过感官"看、闻、摸、尝"和一些简易的化学方法来鉴别,从而维护自身利益。