鲜黄芪和干黄芪挥发性化学成分比较分析

Volatile Analysis in Fresh and Dried Astragali Radix

采用同时蒸馏-萃取法提取,用气相-色谱质谱联用法结合计算机谱图检索,对鲜黄芪和干黄芪挥发性化学成分进行分析鉴定。结果表明:鲜黄芪和干黄芪挥发性成分的得率分别为0.64%、0.43%,鲜黄芪和干黄芪共鉴定出挥发性成分76种;二者的共有成分为正己醇、(E)-2-己烯-1-醇、正己醛、己-2-烯醛等11个化合物;鲜黄芪中鉴定出43种挥发性成分,主成分是正己醇、邻二甲苯、(E)-2-己烯-1-醇、(E)-2-己烯醛、正己醛;干黄芪中鉴定出44种香气成分,主成分是正己醛、正己醇、己-2-烯醛。干黄芪挥发性成分与新鲜黄芪挥发性成分相比较组成和相对含量存在着较大差异。

Simultaneous distillation-extraction followed by gas chromatography-mass spectroscopy（GC-MS） analysis was conducted to analyze volatiles in fresh and dried Astragali Radix.The yield of volatile compounds from fresh and dried Astragali Radix was 0.64% and 0.43%,respectively.Totally 76 chemical components were identified and 11 compounds including 1-hexanol,（E）-2-hexen-1-ol,hexanal,2-hexenal were presented in both fresh and dry samples.Forty three compounds were identified in fresh sample and the major ones were 1-hexanol,（E）-2-hexen-1-ol,hexanal,（E）-2-hexenal,o-xylene;44 compounds were identified in dry sample and the major ones were hexanal,1-hexanol,2-hexenal.Significant difference was found in volatile types and concentrations in fresh and dry samples.