目的 建立一种同时测定牛大力中多种金属元素的方法。方法 采用微波消解和电感耦合等离子体质谱方法测定不同产地的牛大力中Fe、Mn、Cu、Zn、Pd、Cd、As和Se共8种金属元素含量。结果 不同产地的牛大力中含有的Fe、Mn、Cu、Zn、Pd、Cd、As和Se含量略有差异,Fe、Mn、Cu和Zn 4种元素的含量均＞1.0 mg·kg-1,Pd、Cd、As和Se 4种元素含量大多＜1.0 mg·kg-1,该方法的各金属元素线性相关系数在0.999 2~1.000 0,加标平均回收率为87.0%~110.8%,重复性实验的RSD＜10.0%。结论 建立同时测定中药牛大力中多种金属元素含量的微波消解-ICP-MS方法,该方法简便、灵敏度高、精密度好、重复性好,可用于牛大力中金属含量的测定。
Abstract
OBJECTIVE To establish a method for simultaneous determination of multiple metal elements in Millettia speciosa Champ. METHODS Eight kinds of metal elements, i.e., Fe, Mn, Cu, Zn, Pd, Cd, As, and Se in Millettia speciosa Champ from different origins were determined by microwave digestion and ICP-MS. RESULTS The contents of Fe, Mn, Cu, Zn, Pd, Cd, As, and Se in Millettia speciosa Champ from different origins were slightly different, the contents of Fe, Mn, Cu, and Zn were all above 1 mg·kg-1, while the contents of Pd, Cd, As and Se were mostly less than 1 mg·kg-1. The linear correlation coefficient of each metal element was 0.999 2-1.000 0, the average recovery was 87%-110.8%, and the RSDs of the reproducibility test was less than 10%. CONCLUSION A microwave digestion and ICP-MS method for simultaneous determination of multiple metal elements in Chinese medicine Millettia speciosa Champ is established. The method is simple, sensitive, precise and repeatable, which can be used to determine the contents of metals in Millettia speciosa Champ.
关键词
牛大力 /
电感耦合等离子体质谱法 /
微波消解 /
金属元素
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Key words
Millettia speciosa Champ /
ICP-MS /
microwave digestion /
metal element
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中图分类号：
R284
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脚注
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基金
广西高校中青年教师科研基础能力提升项目(项目编号:2019KY1403)
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