摘要
本研究用甲醇和氯仿,使蛋黄液从一相系统转变成二相系统来提取鸭蛋中的脂类,并将脂肪甲基化,用100m×0.25mm的GC毛细管柱来测定脂类中脂肪酸的组成。气相测定结果表明,蛋黄脂肪中C16:0、C18:0、C18:1-11c、C18:2-9c,12c以及C20:3n-3的含量较高;与鲜蛋相比,生和熟的咸蛋在脂肪酸种类上没有明显的变化,但出现了C11:0和C15:0两个饱和脂肪酸。鲜蛋、生熟咸蛋在不饱和脂肪酸含量逐渐减少,分别为67.07%、66.72%、64.68%。表明加工的步骤越多,其蛋黄中的不饱和酸被破坏程度越高。鸭蛋黄通过气相分析发现含有对人体有益的多不饱和脂肪酸如DHA和EPA等。
The lipids of were extracted by using methanol and chloroform to make egg yolk solution from one plase to two phases. Lipids were methylated and determined by C,C equipped with 100m × 0.25mm capillary column. The resdts of C,C indicated that the concentration of fatty acids C16:0,C18:0,C18:1-11c. C18:2-9c,12c and C20:3 n-3 were highest. Compared with fresh eggs, no distinct change on the kinds of fatty acids, but there were two saturated fatty acids C11:0 and C15:0. The contents of unsaturated fatty acids were gradually less, were 67.07%. 66.72%, 64.68% respectively. The more steps in processing, the unsaturated fatty acids in yolk destroyed were higher. GC analysis indicated that there are healthy unsaturated fatty acids in yolk such as DHA and EPA.
出处
《食品科学》
EI
CAS
CSCD
北大核心
2006年第12期588-590,共3页
Food Science
基金
江西省教育厅科研项目(20030058)
关键词
鲜鸭蛋
咸鸭蛋
提取
脂类
测定
fresh eggs
salted eggs
lipids
extraction
determination