Maxwell Sherrod L, Culligan Brian K, Noyes Gary W
Savannah River Nuclear Solutions, LLC, Building 735-B, Aiken, SC 29808, USA.
Appl Radiat Isot. 2010 Dec;68(12):2125-31. doi: 10.1016/j.apradiso.2010.05.018. Epub 2010 Jun 17.
A new rapid method for the determination of actinides and strontium in air filter samples has been developed at the Savannah River Site Environmental Lab (Aiken, SC, USA) that can be used in emergency response situations. The actinides and strontium in air filter method utilizes a rapid acid digestion method and a streamlined column separation process with stacked TEVA, TRU and Sr Resin cartridges. Vacuum box technology and rapid flow rates are used to reduce analytical time. Alpha emitters are prepared using cerium fluoride microprecipitation for counting by alpha spectrometry. The purified (90)Sr fractions are mounted directly on planchets and counted by gas flow proportional counting. The method showed high chemical recoveries and effective removal of interferences. This new procedure was applied to emergency air filter samples received in the NRIP Emergency Response exercise administered by the National Institute for Standards and Technology (NIST) in April, 2009. The actinide and (90)Sr in air filter results were reported in less than 4 h with excellent quality.
美国南卡罗来纳州艾肯市萨凡纳河现场环境实验室开发了一种新的快速方法，用于测定空气过滤器样品中的锕系元素和锶，该方法可用于应急响应情况。空气过滤器中锕系元素和锶的测定方法采用快速酸消解方法和简化的柱分离过程，使用堆叠的TEVA、TRU和锶树脂柱。采用真空箱技术和快速流速以减少分析时间。通过氟化铈微沉淀制备用于α能谱计数的α发射体。纯化的90Sr馏分直接装在样品盘上，通过气流正比计数法进行计数。该方法具有较高的化学回收率和有效的干扰去除能力。这一新程序应用于2009年4月由美国国家标准与技术研究院（NIST）管理的NRIP应急响应演习中收到的应急空气过滤器样品。空气过滤器中锕系元素和90Sr的测定结果在不到4小时内报告，且质量优异。
