气相色谱-质谱联用法分析奶及乳制品中的脂肪酸

Analysis of Fatty Acids in Milk and Dairy Products by GC/MS

对奶及乳制品中脂肪酸的组成和含量进行测定.采用哥特里-罗兹法提取奶及乳制品中的脂肪油,氢氧化钾-甲醇溶液法甲酯化,以气相色谱-质谱联用仪进行了分析,结果表明奶及乳制品中的脂肪酸主要以碳8到碳24的脂肪酸为主,各脂肪酸在不同类型的奶及乳制品中含量也不相同.

To determine the fatty acids in milk and dairy products.The fatty oils of milk and dairy products were extracted by Rose-Gettlieb method,the fatty acids in the fatty oils were esterified by potassium hydroxide-methanol,and then analyzed by gas chromatography-mass spectrometry(GC/MS).The results indicate that main fatty acids' carbon chain were from 8 to 24,each fatty acid has different conent in different samples and the content was determined by area normalization.