[利用淀粉粒X射线衍射法鉴别贝母类药材]
[Identification of Fritillaria herbal drugs by X-ray diffraction of starch grains].
作者信息
Wang Shu-Jun, Gao Wen-Yuan, Yu Jiu-Gao, Xiao Pei-Gen
机构信息
The College of Pharmaceutical Science and Biotechnology, Tianjin University, Tianjin 300072, China.
出版信息
Zhongguo Zhong Yao Za Zhi. 2005 Jun;30(11):805-7.
OBJECTIVE
To provide a simple method to identify different of herbal drugs of Fritillaria.
METHOD
The X-ray diffraction spectra of five Fritillaria powders were obtained by X-ray diffractometry (XRD).
RESULT
By analyzing the diffraction peaks of starch over the 2theta diffraction angle in the range of 10 degrees-30 degrees, we concluded that the crystal type of starch in F. thunbergii, F. ussurensis, F. pallidifloca and F. hupehensis was B-type. However, the crystal type of starch in F. cirrhosa was CB-type. The degree of crystallinity of starch was 42.1%, 43.6%, 37.7%, 35.9% and 30.8%, corresponding to F. thunbergii, F. ussurensis, F. pallidiflcoca,F. cirrhosa and F. hupehensis.
CONCLUSION
Based on the differences of crystallinity of starch and X-ray diffraction spectra of Fritillaria powders, different species of Fritillaria can be identified.
目的
提供一种鉴别不同川贝母类药材的简便方法。
方法
采用X射线衍射法（XRD）获取5种川贝母粉末的X射线衍射图谱。
结果
通过分析10°-30° 2θ衍射角范围内淀粉的衍射峰，得出浙贝母、平贝母、暗紫贝母和湖北贝母中淀粉的晶型为B型，而川贝母中淀粉的晶型为CB型。浙贝母、平贝母、暗紫贝母、川贝母和湖北贝母中淀粉的结晶度分别为42.1%、43.6%、37.7%、35.9%和30.8%。
结论
根据川贝母粉末淀粉结晶度及X射线衍射图谱的差异，可鉴别不同种类的川贝母。
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