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

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（咒妨）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。

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

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 digest...