原子发射光谱法直接测定独居石矿物中钇组稀土元素

建立了原子发射光谱法测定独居石矿物中钇组稀土元素的分析方法。在260.00~360.00 nm波段内,选择不受干扰的分析谱线,用炭粉作缓冲剂,钪作内标元素,样品不需要化学处理,不需分离,可直接采用原子发射光谱法测定钇组稀土元素。方法相对标准偏差(RSD,n=12)为1.6%~6.2%,准确度RE＜±12.0%,方法简单、快速、可行。

Direct Determination of Yttrium-group Rare Earth Elements in Monazite Ore by Atomic Emission Spectrometry

A method for the determination of zinc,especially in complicated geological samples,by hydride generation atomic fluorescence spectrometry with alkaline system was established.Operation conditions for steam generation from alkaline solution and instrument parameters were investigated and optimized.Adding nickel ion enhanced zinc signals obviously.Under the optimized condition the detection limit of the method for zinc was 0.24 μg/L with dynamic linear range of 0.5~800 μg/L.In comparison with traditional acid system,new system provides higher sensitivity,wider linearity and less interference from coexistent elements.The method has been applied to the determination of zinc in national geological standard samples with satisfactory results.The recoveries of the method are 94.1%~ 101.2% with precision of less than 4.0%RSD(n=6).