无锡地区人乳脂肪脂肪酸组成及sn-2位脂肪酸分布  

Fatty acid composition and sn-2 fatty acid distribution of human milk from Wuxi prefecture(Jiangsu,China)

作　　者：夏袁[1] 项静英[2] 曹晓辉[2] 曹敏恺[2] 金青哲[1] 王兴国[1] 

机构地区：[1]江南大学食品学院,食品科学与技术国家重点实验室,食品安全与营养协同创新中心,江苏无锡214122 [2]无锡市妇幼保健院,江苏无锡214122

出　　处：《中国油脂》2015年第11期44-47,共4页China Oils and Fats

基　　金：国家自然科学基金(31401619)

摘　　要：采集无锡地区150例人乳样品,提取乳中脂肪后,采用气相色谱法对人乳脂肪中总脂肪酸及sn-2位脂肪酸进行测定。结果表明:人乳脂肪总脂肪酸中饱和脂肪酸含量较低,主要为棕榈酸,不饱和脂肪酸含量较高,主要为油酸和亚油酸。随着泌乳期的延长,中碳链饱和脂肪酸(C8∶0、C10∶0、C12∶0)及单不饱和脂肪酸(C16∶1)含量逐渐增加,而部分长碳链饱和脂肪酸及长碳链多不饱和脂肪酸如二十碳五烯酸(EPA)、二十二碳六烯酸(DHA)含量明显下降。人乳脂肪中sn-2位脂肪酸组成中饱和脂肪酸含量约为70%,主要为棕榈酸。One hundred and fifty human milk samples were collected from Wuxi prefecture, then the hu- man milk fat was extracted, and the total fatty acids and sn -2 fatty acid of the extracted human milk fat were analyzed by gas chromatography. The results showed that the content of saturated fatty acids in the total fatty acids of human milk fat was low with palmitic acid as the main fatty acid, while the content of unsaturated fatty acids was high with oleic acid and linoleic acid as the main fatty acids. With the lactation period prolonging,the contents of medium carbon chain saturated fatty acids（C8： 0,C10： 0,C12： 0） and monounsaturated fatty acid （ C 16：1 ） increased gradually, while the contents of part long carbon chain sat- urated fatty acids and long carbon chain polyunsaturated fatty acids such as EPA and DHA decreased sig- nificantly. The content of saturated fatty acids in sn - 2 fatty acids of human milk fat was 70%, mainly containing palmitic acid.

关 键 词：人乳 人乳脂肪 脂肪酸 sn-2位脂肪酸 

分 类 号：R153.1[医药卫生—营养与食品卫生学]