枯萎霉变对柠檬型香茅草精油得率和主成分含量的影响  

Effect of Withering and Mildewing on the Yield and Composition of Essential Oil of Cymbopagon citratus

作　　者：孟中磊[1,2] 周丽珠[1,2] 李军集[1,2] 梁忠云[1,2] 李桂珍[1,2] 

机构地区：[1]广西壮族自治区林业科学研究院,广西南宁530002 [2]广西特色经济林培育与利用重点实验室,广西南宁530002

出　　处：《生物质化学工程》2016年第3期46-50,共5页Biomass Chemical Engineering

基　　金：广西地方标准项目(2015-0228)

摘　　要：采集广西防城港种植的柠檬醛型香茅草,对刚收割下来的香茅草枯萎叶稍、新鲜茎、新鲜全草、干燥全草的精油得率和成分进行分析,并考察自然存放霉变对香茅草精油得率和精油主要化学成分的影响。结果表明:在湿热环境下,随着存放时间的延长,香茅草腐烂程度加重,其精油得率降低,精油主要成分橙花醛和香叶醛总含量也降低。新鲜全草与干燥全草的含油率基本相同,新鲜香茅草精油中柠檬醛GC含量约为71.028%,得油率为0.483%,经过7天的自然腐烂后,霉变的香茅草精油中柠檬醛的GC含量降为66.1%,得油率为0.317%。新鲜茎精油柠檬醛GC含量78.766%为最高,枯萎叶稍精油得率最低为0.174%。The yield and composition of essential oils were studied. They were obtained from the withered balde tip,fresh stem,fresh whole grass and dry whole grass of harvested Cymbopogon citratus（ D. C.） Stapf produced in Fangchenggang City,Guangxi by steam distillation. The effects of mildewing on the essential oil were investigated. The results showed that the C. citratus decayed along with time in hygrothermal environment. According to the experimental results,it was seen that not only the principal components in essential oils,such as neral and geranial,but also the yield from grass was reduced. The oil yield of fresh whole grass and dry whole grass were almost equal. The yield and citral content were 0. 483 % and 71 % from fresh C. citratus essential oil,but they reduced to 0. 317 % and 66. 1 % from withered grass when they was decayed after 7 days. The highest content of citral with 78. 8 % was obtained from the fresh stem essential oil,and the lowest oil yield with 0. 17 % was obtained from the withered balde tips.

关 键 词：香茅草 腐烂 精油得率 柠檬醛 

分 类 号：TQ654.2[化学工程—精细化工]