目的:分析比较玛咖植株不同部位和类似玛咖样品蔓菁中的挥发油化学成分。方法:以环己烷超声,采用GC-MS法对玛咖植株不同部位和蔓菁中的挥发油化学成分进行分离鉴定,结合质谱库检索系统对化合物进行结构鉴定,应用色谱峰面积归一化法计算各成分的相对百分含量。结果:经过鉴定,玛咖植株不同部位根及叶中,玛咖及蔓菁化学成分和相对含量方面均有一定差异,玛咖根、玛咖叶、蔓菁根分别鉴定出48、42、41种挥发性成分,玛咖根和玛咖叶共有成分为30种,玛咖根和蔓菁根共有成分为30种,且相对含量有差异。结论:玛咖根和玛咖叶,玛咖和蔓菁在挥发性成分及百分含量上有相同之处也有一定差异,间接证明这两组之间有药理活性方面的一致性,也有某些药理作用的独特性,所以不能随便混用,这也为鉴别玛咖根及蔓菁根提供了在化学成分上面的依据。 OBJECTIVE: To analyze and compare the chemical constituents of volatile oils in different parts of Maca mulberry plant and the similar sample of Maca. METHODS: The chemical constituents of volatile oil from different parts of the plant and the essential oil of Brassica juncea were separated and identified by GC-MS using cyclohexane ultrasound. The structure of the compounds was identified by GC-MS. The peak area normalization Calculate the relative percentage of each component. Results: After identification, there were some differences in the chemical components and relative contents between different parts of Cassia macrophylla roots and leaves, such as Maca root, Maca leaf and Brassica root, 48,42,41 The volatile components, Maca root and Maca leaf share of 30 species, Maca root and the root of the total of 30 species, and the relative content of the difference. CONCLUSIONS: There are also differences in the differences in volatile components and percentages between Maca root and Maca leaf, Maca and Brassica alba, indirectly demonstrating consistency in pharmacological activity between the two groups and also some Pharmacological uniqueness, it can not be mixed, it also provides identification of maca roots and roots of the chemical composition of the above basis.