煅硼砂X射线衍射指纹图谱研究

Study on X-ray diffraction and finger print of Calcined Borax

目的:建立中药煅硼砂X射线衍射指纹图谱,为煅硼砂质量评价提供新方法。方法:采用X射线衍射技术对煅硼砂样品进行定性分析,并对各样品共有峰进行相似度分析。结果:获得了8个煅硼砂样品的X射线衍射图谱,其中7个样品衍射图谱几何拓扑特征基本一致;利用该7批煅硼砂样品X衍射图谱得到煅硼砂的X射线衍射指纹图谱;并以指纹图谱为对照,根据煅硼砂X射线衍射图谱中各特征峰峰高强度,以夹角余弦法和相关系数法计算各样品X射线衍射图谱的相似度,发现不同样品X射线衍射图谱共有峰相似度均较高,与聚类分析结果一致。结论:X射线衍射指纹图谱分析方法专属性强,准确可靠,可实现对煅硼砂的鉴别和质量评价。

Objective： To establish fingerprint of Calcined Borax,and to provide a new method for evaluating the quality of Calcined Borax.Methods： Adopting X-ray diffraction techniques to analyze Calcined Borax qualitatively and comparing the semblance of the public peaks.Results： Obtaining X-ray diffraction patterns of 8 samples about Calcined Borax,the geometric and topological characteristics of 7 samples is consistent.Using the X-ray diffraction patterns of that 7 samples obtain X-ray diffraction fingerprint of Calcined Borax.And accord to the fingerprints and the intensity of each characteristic peak in X-ray diffraction patterns of Calcined Borax to calculate the similarity of different samples which use the cosine law and the correlation coefficient method.We found that similarity of common peaks in different samples of X-ray diffraction pattern is high,which is consistent with the results of the cluster analysis.Conclusion： For analysis of calcined borax it has good specificity and feasible by X-ray diffraction fingerprint and it can be used to distinguish and evaluate Calcined Borax.