FTIR直接鉴定紫苏子及其伪品的研究

本文首次采用傅里叶变换红外光谱法的单次反射采样技术,直接、快速、准确地测定了种子类中药材紫苏子及其伪品的红外光谱。结果表明:种子类中药材紫苏子及其伪品的种仁和皮层由于所含化学成分的不同,其红外光谱的吸收的位置和强度均有明显差异,发现紫苏子与白苏子为同种植物,野生紫苏子则有所区别,且紫苏子与其伪品石荠苧、苏州荠苧及疏花荠苧的红外光谱吸收差别较大。根据红外特征吸收能够达到中药材的真伪鉴别及种类认定的目的。该方法具有直接、快速、准确、无需制样等特点。

Direct Identification of Perilla Frutescens Seeds from Its Confusable Varieties by FTIR

The IR of kernel and boil, cortex of perilla frutescens seeds and its confusable varieties were obtained directly, quickly and accurately by Fourier transform infrared spectroscopy. The results show that IR characteristics of different peaks and intensities of kernel and boil, cortex of Perilla frutescens (L.) Britt. seeds and its confusable varieties, such as Mosla scabra (Thunb. ) C. Y. Wu et H. W. Li, and M. SoochouensisMatsuda, and Mosla dianthera (Buch. Ham.) Maxim. , are different. Obvious characteristics for its identification with different chemical compounds in FTIR were revealed, which can be used to identify Perilla frutescens (L.) Britt. seeds and its confusable varieties. Furthermore, the approrch can be achieved quickly and accurately without extraction and separation of samples.