Savannah River Nuclear Solutions, LLC, Aiken, SC 29808, USA.
Anal Chim Acta. 2011 Sep 2;701(1):112-8. doi: 10.1016/j.aca.2011.06.011. Epub 2011 Jun 15.
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 (RDD), 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 8h 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.
美国萨凡纳河场址环境实验室（南卡罗来纳州艾肯）开发了一种新的快速测定紧急混凝土和砖样品中锕系元素的方法，可用于应急响应情况或常规分析。如果发生放射性分散装置（RDD）、简易核装置（IND）或核事故，将迫切需要快速分析许多不同的环境基质，包括混凝土和砖等建筑材料，以支持剂量缓解和环境清理。该用于混凝土和砖样品中锕系元素的新方法采用了快速氢氧化钠熔融法、氟化镧基质去除步骤以及使用 TEVA、TRU 和 DGA 树脂柱分离过程。采用稀土微沉淀法制备α发射体，通过α谱法进行计数。该方法显示出高的化学回收率和有效去除干扰。在不到 8 小时的时间内，即可完成混凝土和砖样品分析中的锕系元素测定，为紧急样品提供了优异的质量。快速熔融技术是一种坚固的样品消解方法，可确保有效消解任何难熔的锕系元素颗粒。
