矿物药白石英优质矿产资源筛选及XRD Fourier指纹图谱研究

目的 分析不同产地白石英样品中矿物成分及含量，评价不同产地白石英样品的质量，筛选白石英优质矿产资源，并建立白石英X射线衍射（XRD）Fourier特征指纹图谱。方法 通过偏光显微及XRD分析不同样品矿物成分及其含量，以结晶度和石英含量作为评价指标。采用粉末XRD对白石英样品进行分析，建立中药白石英XRD Fourier特征指纹图谱，并进行模糊聚类分析、主成分分析和相似性评价。结果 偏光显微分析结果显示，不同产地白石英样品在结晶度上有明显不同。物相分析结果显示白石英样品主要成分为石英和正长石，且大多数样品含有钠长石。不同产地白石英中石英质量分数为91.2%~99.4%，其中浙江省安吉县章村镇和安徽省绩溪县扬溪镇白石英中石英质量分数最高，均为99.4%，浙江安吉县杭垓镇产白石英中石英质量分数为91.2%。建立了以12个共有峰为特征指纹信息的白石英XRD Fourier指纹图谱分析方法，其XRD Fourier指纹图谱的相似度为0.993～1.000。结论 在所采集的样品中，白石英药材品质总体较好，石英质量分数均在90.0%以上，其中浙江省安吉县章村镇和安徽省绩溪县扬溪镇所产白石英品质最好，其次为福建永安小陶镇和江苏新沂阿湖镇产白石英。偏光显微特征观察和XRD Fourier指纹图谱分析法可用于白石英的鉴定与分析。

Screening of Quality Mineral Resources and X-Ray Diffraction Fourier Fingerprint of Mineral Chinese Medicine Quartz Album

Objective To evaluate the quality of quartz album from different origins, select the quality mineral resources based on the mineral constituents in quartz album samples and content of the constituents, and establish the X-ray diffraction (XRD) Fourier fingerprint of the Chinese medicine.Methods The mineral constituents in different samples and the content of the constituents were analyzed by polarizing microscopy and XRD, and samples were assessed with the indexes crystallinity and quartz content. To be specific, X-ray powder diffraction was employed for analysis of quartz album to establish the XRD Fourier fingerprint, followed by fuzzy clustering analysis, principal component analysis, and similarity evaluation.Results According to the results of polarizing microscopy, the crystallinity of quartz album samples was obviously different among the origins. Phase analysis suggested that the main mineral constituents in the samples were quartz and orthoclase, and the majority of the samples contained albite. The quartz content in the samples fell in the range of 91.2%-99.4%, with the highest content detected in samples from Zhangcun Town, Anji County, Zhejiang Province and Yangxi Town, Jixi County, Anhui Province (both 99.4%), and lowest content in sample from Hanggai Town, Anji County, Zhejiang Province (91.2%). The XRD Fourier fingerprints of the samples characterized by 12 common peaks were established, with the similarities of 0.993-1.000.Conclusion The quality of quartz album samples collected in this study was generally high, as manifested by the quartz content of above 90.0%. Among them, the samples produced in Zhangcun Town, Anji County, Zhejiang Province and Yangxi Town, Jixi County, Anhui Province were the best, followed by those from Xiaotao Town, Yongan County, Fujian Province and Ahu town, Xinyi City, Jiangsu Province. Polarizing microscopy and XRD Fourier fingerprint analysis are applicable to the identification and quality analysis of quartz album.