Environmental and human monitoring of Americium-241 utilizing extraction chromatography and alpha-spectrometry.
Environmental and human monitoring of Americium-241 utilizing extraction chromatography and alpha-spectrometry.
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利用萃取色谱法和 α 光谱法对 Americium-241 进行环境和人体监测。
作者：
S. J. Goldstein;C. Hensley;C. Armenta;R. J. Peters
相对于传统方法，萃取色谱法的最新发展简化了从复杂基质中分离镅的过程，为α光谱学做准备。在这里，我们提出的程序开发/适用于水，空气和生物测定样品小于1克的无机残留物的结果。先前的分析方法需要使用复杂的多阶段程序来从这些基质中分离镅。较新的，简化的程序只需要一个单一的2毫升萃取色谱分离的Am和镧系元素从样品的其他成分。该方法已实施了广泛的各种“真实的”环境和生物测定样品从洛斯阿拉莫斯地区，并已获得一致的可靠和准确的结果与适当的检测限。与现有技术相比，新方法将分析通量提高了约2倍，并减少了酸和混合废物产生的环境危害。与以前使用的更复杂和费力的方法相比，分析准确性，再现性和可靠性也得到了显着提高。
Recent developments in extraction chromatography have simplified the separation of americium from complex matrices in preparation for alpha-spectroscopy relative to traditional methods. Here we present results of procedures developed/adapted for water, air, and bioassay samples with less than 1 g of inorganic residue. Prior analytical methods required the use of a complex, multistage procedure for separation of americium from these matrices. The newer, simplified procedure requires only a single 2 mL extraction chromatographic separation for isolation of Am and lanthanides from other components of the sample. This method has been implemented on an extensive variety of "real" environmental and bioassay samples from the Los Alamos area, and consistently reliable and accurate results with appropriate detection limits have been obtained. The new method increases analytical throughput by a factor of approximately 2 and decreases environmental hazards from acid and mixed-waste generation relative to the prior technique. Analytical accuracy, reproducibility, and reliability are also significantly improved over the more complex and laborious method used previously.