Rapid radiochemical method for determination of actinides in emergency concrete and brick samples
Rapid radiochemical method for determination of actinides in emergency concrete and brick samples
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DOI：
10.1016/j.aca.2011.06.011
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发表时间：
2011-09-02
影响因子：
6.2
通讯作者：
Shaw, Patrick J.
中科院分区：
文献类型：
--
作者：
Maxwell, Sherrod L.;Culligan, Brian K.;Shaw, Patrick J.
萨凡纳河现场环境实验室（美国南卡罗来纳州艾肯）开发了一种新的快速测定应急混凝土和砖样品中锕系元素的方法，该方法可用于应急响应情况或常规分析。如果发生放射性弥散装置（ROD）、简易核装置（IND）或核事故，将迫切需要对许多不同的环境基质（包括混凝土和砖等建筑材料）进行快速分析，以支持剂量缓解和环境清理。混凝土和砖中锕系元素的新方法采用快速氢氧化钠熔融法、氟化镧基质去除步骤以及使用堆叠的TEVA、TRU和DGA树脂柱的柱分离过程。使用稀土微沉淀制备α发射体，用于通过α光谱法进行计数。该方法具有较高的化学回收率和有效的去除干扰。混凝土和砖样分析中锕系元素的测定可在8h内完成，应急样品质量优良。快速熔融技术是一种坚固的样品消化方法，可确保任何难熔的锕系元素颗粒都能被有效消化。(C)2011 Elsevier B.V.保留所有权利。
A new rapid method for the determination of actinides in emergency concrete and brick samples has been developed at the Savannah River Site Environmental Lab (Aiken, SC, USA) that can be used in emergency response situations or for routine analysis. If a radiological dispersive device (ROD), Improvised Nuclear Device (IND) or nuclear accident occurs, there will be a urgent need for rapid analyses of many different environmental matrices, including building materials such as concrete and brick, to support dose mitigation and environmental clean-up. The new method for actinides in concrete and brick method utilizes a rapid sodium hydroxide fusion method, a lanthanum fluoride matrix removal step, and a column separation process with stacked TEVA, TRU and DGA Resin cartridges. Alpha emitters are prepared using rare earth microprecipitation for counting by alpha spectrometry. The method showed high chemical recoveries and effective removal of interferences. The determination of actinides in concrete and brick sample analysis can be performed in less than 8 h with excellent quality for emergency samples. The rapid fusion technique is a rugged sample digestion method that ensures that any refractory actinide particles are effectively digested. (C) 2011 Elsevier B.V. All rights reserved.