薄荷和留兰香香气成分的分析与比较

为研究薄荷(Mentha haplocalyx)、留兰香(M.Spicata)两种唇形科薄荷属植物的香气成分,采用动态顶空法采集两种植物释放的香气后,利用自动热脱附-气相色谱/质量色谱联用技术(ATD-GC/MS)对香气成分进行了鉴定。结果表明,在薄荷香气中鉴定出44种成分,远高于留兰香的26种。这些物质分别属于萜烯、醛、酮、脂肪烃、酯、醇、苯形烃,及其他类物质。且留兰香香气释放量则显著高于薄荷,约为薄荷的1.6倍。在两种植物的香气中,萜烯类化合物数量和释放量均为最高,是香气的主要组成种类。d-柠檬烯和2-乙基-1-己醇在薄荷和留兰香中均表现出较高的释放量,可初步推断它们是薄荷、留兰香香气的主要成分。

Analysis on aroma components of Mentha haplocalyx Briq and M.Spicata

In order to investigate the aroma components of two Mentha plants （M.haplocalyx and M.Spicata） in this study,the aromas of the two plants were collected by dynamic headspace respectively,and then identified by Automated Thermal Desorption-Gas Chromatography/Mass Spectrometry techque ATD-GC/MS.The results showed that M.haplocalyx released much more components （44） than M.spicata （26）.These compounds belonged to eight volatile categories which were terpenoid,aldehyde,ketone,fatty hydrocarbon,ester,alcohol,benzenoid and other substances.The release amount of aroma emmtied from M.Spicata was almost 0.6 more than that from M.Haplocalyx.Both in these two plants,the number and release amount of terpenoid were highest among the eight categories,so terpenoid was the main volatile category of the aroma.Among the components,D-limonene and 1-hexanol-2 ethyl-exhibited were the high release amounts in both plants,which suggested that these two compounds were main aroma components of M.haplocalyx and M.Spicata.