火棘不同组织中稀土元素含量的测定

Determination of the Contents of Rare Earth Elements in Different Tissues of Pyracantha fortuneana

目的:测定火棘叶和火棘果两种组织中稀土元素含量。方法:建立了电感耦合等离子体质谱法(ICP-MS)同时测定火棘果和火棘叶中Sc、Y、La、Ce、Pr、Nd、Sm、Eu、Gd、Tb、Dy、Ho、Er、Tm、Yb、Lu等16种稀土元素含量的方法。结果:该方法简单、快速、可靠,线性关系好,决定系数R2均高于0.9991,检出限低于0.5μg·kg^(-1);精密度实验的相对标准偏差RSD在0.5%~3.2%之间;准确度实验黄芪标准物质的测定结果均在推荐值范围以内。结论:火棘叶和火棘果中均含有较高的稀土元素,火棘叶中含量(592μg·kg^(-1))远远高于火棘果中含量(104μg·kg^(-1))。

Purpose: Determined the contents of rare earth elements in the leaves and fruits of Pyracantha fortuneana.Method:Established the ICP-MS Analysis Sc,Y,La,Ce,Pr,Nd,Sm,Eu,Gd,Tb,Dy,Ho,Er,Tm,Yb and Lu 16 kinds of rare earth elements in Pyracantha fortuneana at the same time. And compared the contents of rare earth elements in the two tissues.Results: The method was simple,fast and reliable,good linear relationship,the coefficient of determination R2 was higher than0.9991,detection limit was less than 0.5 μg·kg-1. The relative standard deviation of the precision experiment was between0.5% 3.2%. The results of Huangqi standard substance were all within the recommended range. Conclusion: The leaves and fruits of both had high rare earth elements.Pyracantha fortuneana,and the leaves( 592 μg·kg-1) was much higher than fruits( 104 μg·kg-1).