将植物材料用有机溶剂提取，测定提取物的红外光谱，用这种方法获得不同地区及同一地区不同季节采集的苦皮藤（Ｃｅｌａｓｔｒｕｓａｎｇｕｌａｔｕｓ）根皮的红外光谱具有明显的特征性及稳定性，而且与同属不同种的植物根皮的红外光谱差异很大；苦皮藤根皮和不同比例的南蛇藤（Ｃｅｌａｓｔｒｕｓｏｒｂｉｃｕｌａｔｕｓ）根皮混合后的红外光谱图变化则介于两种纯植物根皮的红外光谱图之间，发生某些峰强度的消弱或增强。这些研究结果说明以红外光谱来鉴别与苦皮藤根皮形态相似的物种以及检验苦皮藤根皮的纯度是可行的。 The plant material is extracted with organic solvent and the infrared spectrum of the extract is measured. The infrared spectrum of the root bark of Celastrus angulatus collected in different regions and regions in different seasons has obvious characteristic and stability, and The infrared spectra of root bark of the same genus differed greatly from each other. The change of the infrared spectra of the root bark of Celastrus orbiculatus mixed with the roots of Celastrus orbiculatus was between the infrared spectra of two pure plant barks Between the graphs, some peak intensities are attenuated or enhanced. These results indicate that it is feasible to identify the species similar to the root bark morphology of bidens and to test the purity of the bark bark on the basis of infrared spectroscopy.