Abstract: Abstract After chemical treatment of Jojoba oil, analyses of GC and GC/MS were made for determining the composition of the oil. The result shows no difference from that reported by Thomas K Miwa, Double bond positions of the fatty acids have been elaborated by means of "remote functional group modification" . The Jojoba oil contains mainly the following percentages of fatty acids and fatty alcohol. Fatty acids (%); Hexadec-7C-enoic 0.07-0.1,Octadec-9C-enoic 3.73- 5.92, Eicos-11C-enoic 37.09-38.83, Docos-13C-enoic 7.09-9.29, Tetracos-15C-enoic 0.62-1.11; Fatty alcohol(%); Octadecenoic alcohol 0.21-0.24, Eicosenoic alcohol 16.15-22.07, Docosenoic alcohol 19.93-23.09, Tetracosenoic alcohol 2.96-4.96.

Key words: Simmondsia chinensis

摘要： 西蒙得木(Simmondsia chinensis)为重要油脂植物。我所引种栽培的西蒙得木种子蜡(液体蜡)经化学处理后，用GC及GC/MS分析，化学成分与原产地一致。我们采用“远端基团修饰法”确定了未见前人报道的脂肪酸的双键位置。分析结果，西蒙得木液体蜡的脂肪酸部分，其主要成分(％)：十六碳烯-7-酸0.07—0.10，十八碳烯-9-酸3.73—5.92，二十碳烯-11-酸37.59-38.83，二十二碳烯-13-酸7.09-9.27，二十四碳烯-15-酸0.62一1.11。脂肪醇部分主要成分(％)：十八碳烯醇0.21—0.24，二十碳烯醇16.15—22.07，二十二碳烯醇19.93—23.09， 二十四碳烯醇2.96—4.96。

关键词: 西蒙得木, 脂肪酸, 脂肪醇, 双键定位