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Position: Home > Articles > Determination of Trace Pb and Cd in Corydalis yanhusuo by Microwave Pressure Acid Digestion-Atomic Absorption Spectrometry Journal of Anhui Agricultural Sciences 2009,37 (4) 44-45

微波增压溶样-原子吸收光谱法测定延胡索样品中微量铅镉

作者：

冯自立

单位：

陕西理工学院陕西省资源生物重点实验室

关键词：

微波溶样;石墨炉原子吸收法;延胡索;铅;镉

摘要：

[目的]研究微波增压溶样-石墨炉原子吸收光谱法测定延胡索中的重金属元素。[方法]以采自陕西省汉中市的延胡索为样品,利用混酸消解样品,采用微波增压溶样-石墨炉原子吸收法直接测定延胡索药材中微量铅和镉的含量,并对微波消解的试剂和条件进行了筛选和优化。[结果]以HNO3+HClO4作为消解试剂效果最佳。在优化的试验条件下,检测出铅和镉的平均含量分别为0.947和0.074μg/ml,含量测定的相对标准偏差(RSD)分别为0.41%和1.32%,加标回收率分别为92.2%和89.8%。分析结果显示,采自陕西省汉中市的延胡索样品中微量铅镉含量符合国家标准。[结论]用微波增压溶样-石墨炉原子吸收光谱法测定中药材微量元素简便快速、准确灵敏并能获得较好的效果。

译名：

Determination of Trace Pb and Cd in Corydalis yanhusuo by Microwave Pressure Acid Digestion-Atomic Absorption Spectrometry

作者：

FENG Zi-li(Shaanxi Provincial Key Laboratory of Bio-resource,Shaanxi University of Technology,Hanzhong,Shaanxi 723001)

关键词：

Microwave digestion;Graphite furnace atomic absorption spectrometry;Corydalis yanhusuo;Pb;Cd

摘要：

[Objective] The study aimed to determine the heavy metal elements in Corydalis yanhusuo by microwave pressure acid digestion-graphite furnace atomic absorption spectrometry.[Method] With C.yanhusuo from Hanzhong City of Shaanxi Province as sample,and the sample was digested by mixed-acid,the trace Pb and Cd in C.yanhusuo medicinal materials were determined directly by adopting microwave pressure acid digestion-graphite furnace atomic absorption spectrometry,and the reagent and conditions of microwave digestion were also screened and optimized.[Result] The result was the best with HNO3+HClO4 as digestive reagent.Under optimized experiment conditions,the average content of Pb and Cd detected were 0.947 and 0.074 μg/ml resp.the relative standard deviation(RSD) of content determination were 0.41% and 1.32% resp.,the recoveries of standard addition were 92.2% and 89.8% resp.The analysis results showed that the trace Pb and Cd content in C.yanhusuo sample from Hanzhong City of Shaanxi Province conformed to national standard.[Conclusion] Determining the trace elements in Chinese medicinal materials by microwave pressure acid digestion-graphite furnace atomic absorption spectrometry,the easy,rapid,accurate and sensitive results could be achieved.

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微波增压溶样-原子吸收光谱法测定延胡索样品中微量铅镉

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