文章利用X射线荧光光谱仪测定三七花中常量元素(K、Na、Ca、Mg、Al、Cl、P、S)和微量元素(Fe、Zn、Cu、Si、Mn、Ni)的方法。样品粉末采用硼酸压片制样,以国家标准物质生物样品混样法合成标准物质用于制作标准曲线。方法检出限在1.1~23.7μg·g~(-1)之间,测量精密度为1.04%~8.98%。此方法具有简单、高效、成本低等特点,准确度和精密度均能满足测定要求。利用X射线荧光光谱法对市售3个产地三七花中元素的含量进行测定。结果表明,产地不同其常量元素和微量元素含量不同,云南文山三七花中各元素含量较高,具有较高的营养保健价值。
In the study, X-Ray Fluorescence Spectrometry determination of the normal element (K, Na, Ca, Mg, Al, Cl, P, S) and the trace element (Fe, Zn, Cu, Si. Mn, Ni) in Notoginseng flowers was presented. The samples and the standards were prepared by pressed powder pellet technique. The matrix effects and the interferences of spectral lines were eliminated by mixing. The results showed that values of detection limit of the method were in the range of 1.1-23.7 lagg i and the precision was from 1.04 % to 8.98 %. The proposed method is simple, efficient, economical, and has satisfactory accuracy and precision for the determination requirements. Three kinds of notoginseng flower contain contents were different, and Notoginseng flowers from Wenshan contain higher element content with higher nutrition value.