基于微量元素分析的三七产地及其主侧根鉴别

为解决三七主侧根粉掺杂、以侧充主等问题,利用干法消解结合电感耦合等离子体发射光谱仪(ICP-OES)技术建立三七中Se、Cd等11种元素同步检测的方法,各元素加标回收率范围在95.72％ ～102.3％,相关系数r值达0.97198～0.99997,其RSD值为0.09％ ～2.88％、且均小于3％.分析云南5个不同产...

Discriminant analysis of origin of Panax notoginseng and its main roots and lateral roots based on trace element analysis

In this study, in order to solve the problems of main and lateral root doping of Panax notoginseng, the method of simultaneous detection of 11 elements such as Se and Cd in Panax notoginseng was established by dry digestion combined with inductively coupled plasma optical emission spectrometry (ICP-OES) technology. The range was from 95.72% to 102.3%, the correlation coefficient r value was 0.971 98 to 0.999 97, the RSD value were 0.09% to 2.88%, and all were less than 3%. Under this condition, the five different origins of Panax notoginseng and their difference in element content in main and lateral roots were detected in Yunnan. The results showed that the content of As, Pb and Cd in Panax notoginseng was not more than 0.5 mg·kg^-1; none of them exceeded the standard. FA analysis showed that the main influencing factors of the sample elements were As, Fe and Pb. The 3D and 2D mathematical models established by principal component analysis (PCA) and canonical discriminant analysis (CDA) made a clear distinction between Panax notoginseng and its main roots in 5 different production areas, and there was no overlap. The clustering analysis (CA) results were consistent with the actual production areas, and the main roots of different production areas were systematically divided into two categories. PCA and CDA analysis results were consistent. The purpose of this study was to provide a fast and accurate new method for judging the origin of Panax notoginseng and identifying the main roots and lateral roots.