香茶菜属3种植物不同器官红外光谱-排序的比较

香茶菜属（Isodon)植物具有重要的药用价值，是国内中药生产的一类重要原料。与其他方法比较，应用OMNI采样器－FTIR直接测定法鉴定中药材具有简便、快速和准确的优点，而且不需要对样品进行萃取或粉碎处理。本文应用傅里叶变换红外光谱仪测定了香茶菜属中的内折香茶菜（Isodon inflexus)、线纹香茶菜（I.lophanthoides)和大萼香茶菜（I.macrocalyx)三个种类11个样品的红外光谱，分析比较了11个样品在红外光谱图上的差异程度。分析表明，基于红外光谱的主成分分析在反映不同样品植物化学组成差异程度上具有应用价值。

IR-fingerprinting Ordination Comparison on Different Organs of three Species of Isodon

The plants of the genus Isodon are of important medicinal values, being widely used in the production of the Chinese traditional and herbal drugs. Compared with the other identification methods, the identification of the Chinese traditional and herbal drugs using the fourier transform infrared spectrometer with OMNI collector is simple and convenient, fast and accurate. Moreover, the extraction or break of the samples are not necessary in the identification using OMNI collector. In the present paper, fourier transform infrared spectrometer with OMNI collector is applied to gain the IR fingerprintings of eleven samples of Isodon inflexus, I. Lophanthoides and I. Macrocalyx. Based on the indices of wavenumber absorbance, the differences of eleven IR fingerprintings are compared by PCA (Principal Component Analysis). The results show that it is practical to apply PCA on the basis of IR fingerprinting to compare the chemical differences of plant samples.