微波消解-火焰原子吸收光谱法测定黄芩中的微量金属元素含量

[目的]测定中药黄芩中微量元素Ca、Mg、Zn、Cu、Fe、Mn的含量,为探讨中药黄芩的药理作用与金属含量的关系提供理论依据。[方法]微波消解黄芩样品,采用恒温变压优化的方法,获得微波消解的最佳条件。用火焰原子吸光光谱法（FAAS）测定微量元素Ca、Mg、Zn、Cu、Fe、Mn的含量。[结果]经测定,黄芩中Ca、Mg、Zn、Cu、Fe、Mn的含量分别为（12 368.070 0±68.363 3）、（8 964.732 0±124.435 8）、（74.696 5±0.462 3）、（23.621 3±1.293 5）、（671.563 0±1.444 5）、（37.281 4±3.142 2）μg/g。采用微波消解-火焰原子吸收光谱法测定黄芩中的微量金属元素含量、稳定性好,结果准确,能够达到检测要求。[结论]黄芩中含有丰富的人体所必需的微量元素,该试验结果为黄芩的开发和利用提供了科学依据。

Determination of the Content of Trace Elements in Scutellaria baicalensis Georgi by Microwave Digestion and FAAS

[Objective] The contents of Ca,Mg,Zn,Cu,Fe and Mn in Scutellaria baicalensis Georgi were determined,so as to provide theoretical basis for discussing the relationship between the pharmacological mechanism of Scutellaria baicalensis Georgi and the content of heavy metals.[Method] The samples were digested with microwave instrument.The best digestion conditions were obtained using the optimizing method of altering pressure and stabilizing temperature.Then the content of trace elements Ca,Mg,Zn,Cu,Fe and Mn were determined by using frame atomic absorption spectrophotometry(FAAS).[Result] The determination results showed that the contents of Ca,Mg,Zn,Cu,Fe and Mn in S.baicalensis were 12 368.070 0±68.363 3,8 964.732 0±124.435 8,74.696 5±0.462 3,23.621 3±1.293 5,671.563 0±1.444 5,37.281 4±3.142 2 μg/g,respectively.The determination of the contents of trace heavy metals in S.baicalensis by using microwave digestion and frame atomic absorption spectrophotometry had good stability and accurate results.And it can reach the detection demands.[Conclusion] There are affluent trace metal elements that are essential to human body in Scutellaria baicalensis Georgi.The determination results will provide scientific basis for the development and utilization of Scutellaria baicalensis Georgi.