七种花旗参茶包的FTIR光谱法无损鉴别

本文利用傅里叶变换红外光谱法（FTIR）无损快速鉴别了七种花旗参茶包。各种花旗参茶包的红外光谱较特征。根据红外的特征谱图分析，市售的7种花旗参茶包基本上可分为两大类，一类是纯的花旗参药材料末而制成的茶包；另一类是花旗参的提取物和辅料混合后而制成的茶包。红外光谱图还表明各种花旗参茶包所选用的辅料也不尽相同，有的采用葡萄糖，有的则采用蔗糖，辅料所添加的种类与有的商品标定的不符。另外花旗参茶包所添加的辅料较多，花旗参提取物的特征峰较弱，这就表明有的花旗参茶包的质量较差。HPLC的分析结果也证明了采用原药材而制成的花旗参茶包的总皂甙含量高于花旗参的提取物和辅料混合后而制成的茶包，基本上相差了4倍。因此，红外光谱法快速、直观、可靠，适用于中药的鉴定。

A Rapid Method for Detecting Seven Kinds of American Ginseng Tea Bags by FTIR Spectroscopy

A rapid and non destructive method,was used to identify seven commercial American Ginseng Tea bags by Fourier transform infrared spectroscopy (FTIR) in this paper.It could be seen from the results,that each sample has its own characteristic infrared spectrum.Also,the seven tea bags could be divided into two groups:one is made from pure Ginseng powders,and the other is made by Ginseng extractives and additives.The information of additives used by factories could be identified by IR spectra.For example,some factories use glucose,and the others use sucrose as the additives.Furthermore,the quality of the tea bags was identified by the intensity ratio of Ginsengs and additives.In HPLC,the total saponin in tea bags made from Ginseng powders is 4 times higher than that made by Ginseng extractives.Therefore,HPLC analysis gave the same result with FTIR.It is proved that FTIR is a very fast,simple and reliable method to identify Chinese medicine.