碰碰香挥发物化学成分分析

摘要

为探明碰碰香Plectranthus tomentosa叶片挥发物的组成及其相对含量,以长势优的成年碰碰香为研究对象,采用顶空套袋法,并在热脱附系统(TDS)条件下用气相色谱-质谱联用仪(GC-MS)对收集气体进行分析检测.测出叶片挥发物有44种,包括烷烃、烯烃等8类化合物,烯烃中的萜烯类化合物有22种(相对含量为83.32%),其中柠檬烯含量最多(相对含量为47.61%);同时结合保留指数分析碰碰香叶片挥发物化学成分,比单独使用GC-MS其结果更加准确可靠.%This study was conducted to determine the composition of volatile matter from leaves of Plectranthus tomentosa and the relative contribution to its aromatherapy. The dynamic headspace collection method for total dissolved solids (TDS), was used to extract volatile matter of adult P. Tomentosa in good condition, and a gas chromatograph-mass spectrometer (GC-MS) was utilized to detect the composition of the extract. Results showed 44 kinds of volatile matter including eight types of compounds, such as alkanes and olefins. Also, 22 types of terpenoids (relative content of 83.32%)were found with Limonene having the highest level of simple carbohydrates (relative content of 47.61%). Thus, this work demonstrated that a retention index of P. Tomentosa volatile matter from leaves could provide a complementary and convenient method for accurate analysis, which may be helpful for the further exploitation.