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本文采用低温－钾盐乙醇法和低温－丙酮法从鲜鱼油及从制备鱼粉下脚料中制备富含高纯度廿碳五烯酸（ＥＰＡ）和廿二碳六烯酸（ＤＨＡ）甲酯，实验表明本方法可行，ＥＰＡ，ＤＨＡ两者收率之和超过目前市售此类产品两者之和（约６０％左右）的含量，为开发鱼油新资源提供了科学依据。
In this paper, high-purity eicosanoic acid (EPA) and docosahexaenoic acid (DHA) methyl ester were prepared from fresh fish oil and fish meal by using low temperature-potassium salt ethanol method and low temperature-acetone method. It shows that the method is feasible and the sum of the yield of EPA and DHA exceeds the sum of the products (about 60%) of the current market, which provides a scientific basis for the development of new fish oil resources.