【摘要】 采用傅里叶变换红外光谱(二阶导数谱)法对四种石斛茎干粉的红外吸收光谱进行了对比分析。石斛茎含丰富的糖类物质，铁皮、紫皮及大包鞘三种石斛的糖类物质的组成成分比较复杂，糖单元主要是半乳吡喃糖、葡萄吡喃糖、甘露吡喃糖、阿拉伯吡喃糖、木吡喃糖；虫草石斛茎的糖类物质组成成分比较简单，糖单元是半乳吡喃糖、葡萄吡喃糖、甘露吡喃糖。大包鞘石斛有与虫草石斛化学结构相同的糖环物质；铁皮石斛有与紫皮石斛化学结构相同的糖环物质。采用多糖指纹吸收区特征吸收峰可对石斛种类进行鉴定。更多还原

【Abstract】 In this paper, Fourier transform infrared spectroscopy(FTIR) was used to compare the five dendrobium species’ infrared absorption spectra of stem powder. The stem of Dendrobium is rich in saccharides. The saccharides of Dendrobium Officinale, Dendrobium Paxt and Dendrobium wardianum Warner are complex in composition. And the sugar units are mainly galactopyranose, grape pyranose, mannopyranose, arabinopyranose and xypyranose. The sugar components in the stem of Dendrobium strongylanthum Rchb. f. were simple. The sugar units were galactopyranose, grape pyranose and mannopyranose. Dendrobium wardianum Warner had the same chemical structure as Dendrobium strongylanthum Rchb. Dendrobium Officinale had the same chemical structure as Dendrobium devonianum Paxt. The species of Dendrobium could be identified by the characteristic absorption peak of the polysaccharide fingerprint absorption region.更多还原