Methods: The IR of Radix Dipsaci decocting pieces and its confusable varieties Arctium lappa L. was obtained by Fourier Transform Infrared Spectrum and OMNI-sampler directly.

• 方法:采用傅里叶变换红外光谱法并借助OMNI采样器直接测定续断饮片及其伪品牛蒡根的红外光谱。