Ramanaiah G V
Chemical Laboratory, Atomic Minerals Division, Department of Atomic Energy, Begumpet, Hyderabad-500 016, India.
Talanta. 1998 Aug;46(4):533-40. doi: 10.1016/s0039-9140(97)00315-9.
A rapid method is described for the determination of yttrium, scandium, and other rare earth elements (REEs) in uranium-rich geological samples (containing more than 0.1% U) and in pitch blende type of samples by inductively coupled plasma atomic emission spectrometry (ICP-AES) after separation of uranium by selective precipitation of the analytes as hydroxides using H(2)O(2)/NaOH in the presence of iron as carrier. Uranium goes into solution as soluble peruranate complex. The precipitated rare earth hydroxides (including Y and Sc) are filtered and dissolved in hydrochloric acid prior to their aspiration into plasma for their individual estimation after selecting interference free REE emission lines. The method has also been applied to some international reference standards like SY-2 and SY-3 (by doping a known amount of uranium) along with one in-house pitch blende sample and the REE values were found to be in agreement with the most usable values, offering an R.S.D. of 1-8.8% for all the REEs', Y and Sc. The method compared well, with the well- established cation exchange separation procedure.
描述了一种快速方法，用于通过电感耦合等离子体原子发射光谱法（ICP-AES）测定富含铀的地质样品（含铀量超过0.1%）和沥青铀矿类型样品中的钇、钪及其他稀土元素（REEs）。该方法是在铁作为载体存在的情况下，使用H₂O₂/NaOH通过将分析物选择性沉淀为氢氧化物来分离铀。铀以可溶性过铀酸盐络合物形式进入溶液。沉淀的稀土氢氧化物（包括钇和钪）经过过滤后溶解于盐酸中，然后在选择无干扰的REE发射线后，将其吸入等离子体进行各自的测定。该方法还应用于一些国际参考标准，如SY-2和SY-3（通过掺杂已知量的铀）以及一个内部沥青铀矿样品，发现REE值与最可用值一致，所有REEs、钇和钪的相对标准偏差为1-8.8%。该方法与成熟的阳离子交换分离程序相比效果良好。
