六种新疆陆地棉棉籽脂肪酸成分分析

Analysis on Fatty Acid Composition of Six Species of Upland Cotton

目的：通过分析六种新疆陆地棉棉籽脂肪酸成分与含量的变化,为更好的开发,利用丰富的棉籽资源提供实验数据。方法：采用索氏提取法提取了6种新疆陆地棉棉籽油,其棉籽脂肪酸经甲酯化后用气相色谱-质谱联用仪进行分析。结果：不同品种棉籽油所含脂肪酸成分基本相同,但各脂肪酸成分的相对含量差异较大,其中亚油酸含量变化范围为50.30%－57.25%,棕榈酸、油酸含量的变化范围分别为22.24%－30.98%和12.93%－16.84%。不同棉花品种棉籽的多不饱和脂肪酸（PUFA）与饱和脂肪酸（SFA）相对含量比值也不同,变化范围为1.66－2.59。结论：不同品种棉籽,其营养价值及经济价值存在较大差异,其中,新陆早27号棉籽具有相对更好的开发利用价值。

Objective：Tile components and relative contents of six species of Xinjiang Upland cotton were analyzed to provide scientific basis for exploitation and utilization. Method： The cottonseed off of six varieties of Xinjiang Upland Cotton was extracted by Soxhlet extraction, and the fatty acids they contained were analyzed by gas chromatography - mass spectrometry （GC - MS）. Result： The results showed that different varieties of Upland Cotton have the similar composition but the different contents of fatty acids, the contents of 9, 12 - Octadecadienonic acidwere different from 50.30% - 57.25 %, and the Hexadecanoic acid,9 - Octadccadienonic acid were 22.24% - 30.98 %, 12.93 % - 16.84% respectively. In addition, the ratio of polyunsaturated fatty acids （PUFA） and saturated fatty acids （SFA） is also different for different varieties of cotton（1.66 - 2.59）. Conclusion： The nutritional and appfication value for different varieties of Upland Cotton was different. Among them, the 27th Xinluzao cottonseed tins a relatively higher value of utilization.