天麻的傅里叶变换红外光谱鉴别研究

Identification of Gastrodia Elata Blume by Fourier Transform Infrared Spectroscopy

利用傅里叶变换红外光谱法对野生天麻、家种天麻及天麻伪品进行了快速无损鉴别研究。结果表明 ,野生天麻、家种天麻及天麻伪品均有自己的特征红外光谱。根据红外光谱谱峰形状和位置可以容易地鉴别天麻及天麻伪品 ;根据谱峰位置和吸光度比可以区分野生冬天麻和野生春麻、野生天麻和家种天麻 ;根据谱峰吸光度比有可能区分天麻的不同级别。该方法具有快速、简便、不需对样品分离提取等特点。

In this paper, a method of rapid and undamaged identification of wild and cultivated Gastrodia elata Blume, and one of its fakes by Fourier transform infrared spectroscopy (FTIR) is reported. The results show that Gastrodia elata Blume and its fake have different characteristic infrared spectra, by which Gastrodia elata Blume can be identified from its fake. Wild winter, wild spring, and cultivated Gastrodia elata Blume can be discriminated by FTIR, according to the differences of their spectral peaks and absorbance ratios. By the differences of absorbance ratios of several peaks, different grade of Gastrodia elata Blume may be classified. FTIR has proved to be a rapid, simple and nondestructive method for the identification of Gastrodia elata Blume.