不同产地稻米油脂中脂肪酸的气相色谱-质谱分析

采用索氏提取法提取不同产地稻米中的脂肪油,进行甲酯化处理, 利用气相色谱-质谱法对其脂肪酸的成分和相对百分含量进行分析测定。结果表明，从黑龙江稻米、辽宁稻米、吉林稻米、四川稻米、浙江稻米及深圳稻米油脂中鉴定出的脂肪酸分别占检出化合物总量的98.95%、92.70%、84.28%、95.80%、93.46%和68.47%，不饱和脂肪酸含量分别为72.93%、69.21%、61.62%、68.62%、68.16%和51.11%。

Study on Fatty Acid of Rice Oils from Different Areas by GC/MS

The fatty oils were extracted with soxhlet extraction method, and the obtained fatty oils were esterified by sodium hydroxide-methanol. The fatty acides were separated and identified by GC/MS. The results show that the relative contents of the identified fatty acid make up 98.95%, 92.70%, 84.28%, 95.80%, 93.46%, 68.47% of the total identified in Heilongjiang rice, Liaoning rice, Jilin rice, Shichuan rice, Zhejiang rice and Shenzhen rice, respectively. The unsaturated fatty acids account for 72.93%, 69.21%, 61.62%, 68.62%, 68.16% and 51.11%, respectively.