鱼粉脂肪酸组成的分析研究

Study on fatty acid composition in fishmeals by gas-chromatography

本文应用气相色谱对水产饲料的主要原料——— 4类进口鱼粉的脂肪酸组成进行分析 ,结果表明 :①鱼粉中主要脂肪酸含量SFA为C1 6∶0、C1 8∶0 ,MUFA为C1 8∶1、C1 6∶1 ,PUFA为EPA和DHA .② 4类鱼粉中 ,美国、新西兰、俄罗斯的鱼粉MUFA含量较为接近 ,都在 4 0 %左右 ,但新西兰鱼粉的C1 8∶1含量较美国鱼粉高 ,其平均值分别为 2 50 %和 1 9.53% ,而C 2 0∶1、C2 2∶1 ,则比美国低一些 ,俄罗斯鱼粉的含量居两者之间 .智利鱼粉的MUFA比前 3种鱼粉低 ,只有 30 %左右 .③ 4类鱼粉中新西兰鱼粉的PUFA最低 ,它们的EPA与DHA的比值为 :美国鱼粉接近 1∶1 ,新西兰鱼粉为1∶1 .5～ 1∶3.2 ,俄罗斯鱼粉为 1∶1 .2～ 1∶1 .4 ,智利鱼粉为 1∶2左右 ,④智利鱼粉的C2 2∶5n 3明显高于其它 3类鱼粉 ,而C2 0∶1、和C2 2∶1则明显低于其它

This paper deals with the common characteristics and differences amongfour sorts of fishmeal maked in USA?New Zealand ?Russia and Chile by gas chromatography. The main results are as follows: ①The major fatty acids are C16∶0?C18∶0 for SFA,C18∶1 and C16:1 for MUFA,and EPA and EHA for PUFA,respectively.②Among the fishmealsfrom USA?New Zealand and Russia,the percentage of MUFA are close,about 40%.But the content of C18∶1 in New Zealand-fishmeal is higher,the average percentage is 25.0% and 19.5% respectively , and (C20∶1) and C22∶1 are lower than USA-fishmeal. The contentof C18∶1,C20∶1,C22∶1 in Russia-fishmeal are between New Zealand-fishmeal and USA-fishmeal.MUFA in Chile-fishmeal is about 30% lower than the others.③The content ofPUFA in New Zealand-fishmeal is the lowest one. The ratio of EPA/EHA are1∶1(USA)?1∶1.5～1∶3.2(New Zealand)?1∶1.2～1∶1.4(Russia) and (1∶2)(Chile)respectively.④The content of C22∶5n-3 in Chile-fishmeal is higher, and C20∶1 and C22∶1 are lower than the others.