Sakama M, Nagano Y, Saze T, Higaki S, Kitade T, Izawa N, Shikino O, Nakayama S
Department of Radiological Science, Division of Biomedical Information Sciences, Institute of Health Biosciences, the University of Tokushima, Kuramoto-cho 3-18-15 Tokushima 770-8509, Japan.
Appl Radiat Isot. 2013 Nov;81:201-7. doi: 10.1016/j.apradiso.2013.03.056. Epub 2013 Apr 2.
An application of sequential automated SPE separation equipment coupled to the quadrupole-based ICPMS instrumentation with a dynamic reaction cell such as a screening test system of (90)Sr and Pu isotopes in environmental samples was developed in this work. So far, during the course of a large number of reports as to various specific radioactivities in environmental samples surveyed at radioactive contaminated area around the Fukushima Daiichi Nuclear Power Plants (FDNPP), there is a much smaller number of reports on (90)Sr and Pu isotopes than that of (134)Cs and (137)Cs since the FDNPP accident, and then it would be expected to develop the simple analysis method of these isotopes instead of radiation measurements currently in use. In particular, a screening for (90)Sr in environmental samples has been accomplished using an isotopic ratio measurement mode in comparison with the characterization on the Solid Phase Elution (SPE) separation between strontium and zirconium isotopes around the mass-90 fraction. As a result, for a trial analysis of environmental samples of a muddy snow water and a soil which were collected at Fukushima, it was found that the present developed system makes it applicable for achieving up to the specific activity levels of several hundreds Bq/kg ((90)Sr) and about 1-2Bq/kg (Pu isotopes) as the screening test system.
本工作开发了一种顺序自动固相萃取分离设备与基于四极杆的带有动态反应池的电感耦合等离子体质谱仪联用的方法，用于环境样品中（90）Sr和Pu同位素的筛选测试系统。到目前为止，在大量关于福岛第一核电站（FDNPP）周边放射性污染区域环境样品中各种比活度的报告中，自FDNPP事故以来，关于（90）Sr和Pu同位素的报告数量远少于（134）Cs和（137）Cs，因此有望开发出这些同位素的简易分析方法来替代目前使用的辐射测量方法。特别是，通过同位素比率测量模式，结合对质量数90附近锶和锆同位素的固相洗脱（SPE）分离特性，完成了环境样品中（90）Sr的筛选。结果表明，对于在福岛采集的泥泞雪水和土壤等环境样品的初步分析，发现目前开发的系统作为筛选测试系统可适用于达到数百Bq/kg（（90）Sr）和约1 - 2Bq/kg（Pu同位素）的比活度水平。
