Sequential separation of ultra-trace U, Th, Pb, and lanthanides using a simple automatic system.
Sequential separation of ultra-trace U, Th, Pb, and lanthanides using a simple automatic system.
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使用简单的自动系统顺序分离超痕量 U、Th、Pb 和镧系元素。
DOI：
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
M. Magara
中科院分区：
文献类型：
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作者：
Y. Miyamoto;K. Yasuda;M. Magara
铀，钍，铅，镧系元素自动和顺序分离与一个单一的阴离子交换柱。使用由HCl、HNO 3、乙酸和HF的简单且高纯度的酸混合物组成的洗脱剂实现该分离。感兴趣的元素从主要成分中分离出来，主要成分包括碱金属元素、碱土金属元素和铁。这个简单的自动化系统由加压氮气驱动，并使用计算机程序进行控制。优化的分离条件为：柱长50 mm，直径2 mm，阴离子交换树脂直径11 μm，流速35 μL min（-1）。该系统对100 μL料液中50 ng多种元素在5 h内实现了完全分离，净化因子>400，收率>95%。为了评估该系统的性能，使用该系统分离参考粉末岩石样品。目标元素的丰度，包括0.23纳克的镥，准确地确定没有校正的化学回收率或扣除的过程空白。该分离技术节省了化学处理的时间和精力，适用于小环境样品中元素的超痕量定量和同位素分析。
Uranium, thorium, lead, and the lanthanides were automatically and sequentially separated with a single anion-exchange column. This separation was achieved using eluents consisting of a simple and highly pure acid mixture of HCl, HNO3, acetic acid, and HF. The elements of interest were separated from the major constituents, which included alkaline metal elements, alkaline earth metal elements, and iron. This simple and automatic system is driven with pressurized nitrogen gas and controlled using a computer program. An optimized separation was accomplished under the following conditions: a 50 mm long and 2 mm diameter column, 11 μm diameter anion-exchange resin, and a 35 μL min(-1) flow rate. Using this system, 50 ng of varied elements in a 100 μL feed solution were perfectly separated within 5 h with >400 decontamination factors and >95% yield. In order to evaluate the performance of this system, a reference powdered rock sample was separated using this system. Abundances of objective elements, including 0.23 ng of lutetium, were accurately determined without corrections of chemical recovery yield or subtraction of the process blank. This separation technique saves time and effort for chemical processing, and is useful for ultra-trace quantitative and isotopic analyses of elements in small environmental samples.