Department of Chemical Engineering and Analytical Chemistry, University of Barcelona, Marti i Franqués, 1-11, ES-08028, Barcelona, Spain.
Department of Chemical Engineering and Analytical Chemistry, University of Barcelona, Marti i Franqués, 1-11, ES-08028, Barcelona, Spain; Serra-Húnter Programme, Generalitat de Catalunya, Barcelona, Spain; Institut de Recerca de l'Aigua, University of Barcelona, Spain.
Appl Radiat Isot. 2022 Sep;187:110333. doi: 10.1016/j.apradiso.2022.110333. Epub 2022 Jun 17.
There is a necessity to have techniques capable to perform rapid determinations of specific radionuclides with the aim to provide fast response in emergency situations where a large number of samples need to be measured in a short time. Plastic Scintillation Resins (PSresins) raises as an adequate tool to achieve this purpose and in the present study a methodology to determine plutonium using a PSresin based on Aliquat·336 was developed. Different sample treatments have been studied under acidic conditions with an emphasis on valence adjustment treatment to achieve an effective retention within the PSresin. Under 3 M nitric acid conditions and an iron sulphamate (II) + nitrite valence adjustment, quantitative retention and 100% detection efficiency were achieved. The retention of the different interferences evaluated (U, Th, Am, Pb and Tc) was low and therefore they do not interfere significantly in the determination of plutonium, except for Tc. Finally, a stable tracer to calculate the PSresin separation yield was studied, revealing that gold is suitable for this purpose. This procedure was applied to the analysis of spiked sea and river water samples, obtaining errors lower than 10% in their quantification.
有必要开发能够快速测定特定放射性核素的技术，以便在需要在短时间内测量大量样品的紧急情况下提供快速响应。塑料闪烁体（PSresin）是实现这一目的的合适工具，本研究开发了一种使用基于 Aliquat·336 的 PSresin 来测定钚的方法。在酸性条件下研究了不同的样品处理方法，重点是价态调整处理，以实现 PSresin 内的有效保留。在 3M 硝酸条件下，采用亚硫酸铁（II）+亚硝酸盐价态调整，可以实现定量保留和 100%的检测效率。评估的不同干扰物（U、Th、Am、Pb 和 Tc）的保留率较低，因此它们不会对钚的测定产生显著干扰，除了 Tc 以外。最后，研究了一种稳定的示踪剂来计算 PSresin 的分离产率，结果表明金适合用于此目的。该程序已应用于加标海水和河水样品的分析，其定量的误差低于 10%。
