不同产地当归中金属微量元素的比较研究

Comparison of Levels of Trace Metals in Angelica produced in various areas

目的：对不同产地当归中金属微量元素的含量进行初步的比较研究。方法：样品经微波消解后,以铟（In）元素为内标,利用电感耦合等离子体质谱（ICP-MS）测定不同产地的当归中Be、B、A l、V、Cr、Mn、Fe、Co、N i、Cu、Zn、As、Se、Cd、Ba、Hg和Pb等17种微量金属元素的含量。结果：该方法对各元素的检测线为0.003~2.478 ng/g,加样回收率为82.3%~112.2%,标准物质杨树叶的测定值与标示量基本吻合。结论：所建立的方法快捷,准确、灵敏度高,可以用于测定当归中金属的微量元素的含量,不同产地的当归其所含金属微量元素有很大不同,如某地产的当归有些元素含量明显高于其他地方。

Objective：To compare the differences in the levels of trace metals in angelica from various areas.Methods：Samples were dissolved by microwave.The contents of Be,B,Al,V,Cr,Mn,Fe,Co,Ni,Cu,Zn,As,Se,Cd,Ba,Hg and Pb in angelica from various areas were determined by ICP-MS with In as an internal standard.Results：Detection limits for above elements were between 0.003 ng/g and 2.478 ng/g,and recovery of added amount of trace metals fell between 82.3% and 112.2%.The contents of trace metals in standard poplar leaves obtained by the method were in agreement with labeled amount of trace metals.Conclusion：The methed is accurate,reliable and applicable for the determination of trace metals in angelica.