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以长白山茗葱为试材,采用顶空固相微萃取法对其不同部位的挥发油进行提取,通过GC-MS联用技术进行分析鉴定,利用峰面积归一化法计算各化合物的相对质量分数。结果表明:从茗葱根挥发油中得到37个色谱峰,共鉴定出33种化合物,其中2,3-去氢-1,8-桉叶素(50.616%)、甲基-2-烯丙基二硫醚(19.036%)质量分数相对较高;鳞茎挥发油中得到21个色谱峰,共鉴定出19种化合物,其中硫化丙烯(28.459%)、二烯丙基二硫(27.765%)质量分数较高;叶片挥发油中得到24个色谱峰,共鉴定出22种化合物,其中(Z)乙酸叶醇酯(55.910%)、乙酸反-2-己烯酯(9.183%)2种化合物质量分数较高。HSSPME GC-MS是一种可用于分析不同部位茗葱挥发油成分变化的简单可行的分析方法。
Taking Changbai Mountain green onion as test material, the volatile oil in different parts of the plant was extracted by headspace solid-phase microextraction and analyzed by GC-MS. The relative mass fraction of each compound was calculated by the peak area normalization . The results showed that there were 37 compounds identified from the volatile oil of Onion root, and 33 compounds were identified, of which 2,3-dehydro-1,8-eucalyptol (50.616%), methyl- The mass fraction of disulfide (19.036%) was relatively high. There were 21 peaks in the volatile oil of bulb, and 19 compounds were identified. The content of sulfided propylene (28.459%) and diallyl disulfide (27.765% (Z) acetate leaf acetate (55.910%) and trans-2-hexenyl acetate (9.183%) were higher than those of the other two compounds . HSSPME GC-MS is a simple and viable analytical method that can be used to analyze changes in the composition of volatile oil in different parts of the onion.