Shimada Asako, Ozawa Mayumi, Yabuki Koshi, Kimiyama Kazuhiro, Sato Kenji, Kameo Yutaka
Japan Atomic Energy Agency, 2-4 Shirane, Shirakata, Tokai-mura, Naka-gun, Ibaraki, Japan.
Japan Atomic Energy Agency, 2-4 Shirane, Shirakata, Tokai-mura, Naka-gun, Ibaraki, Japan.
J Chromatogr A. 2014 Dec 5;1371:163-7. doi: 10.1016/j.chroma.2014.10.053. Epub 2014 Oct 24.
A method for separation of Mo from Zr, Nb, and other major elements of rubble samples from the Fukushima Daiichi Nuclear Power Station (FDNPS) was developed to enable 93Mo assay of the rubble samples. Although (93)Mo analysis has been reported in a few studies, the known separation method is tedious and time consuming, or the target is a simple material. Therefore, a simple and rapid protocol for the separation of a complex material, i.e., the rubble sample, was developed in this study. Firstly, loss of Mo during the digestion of simulated rubble samples was evaluated. Next, weight distribution coefficients (Kd's) of Zr, Nb, and Mo between an extraction chromatographic resin (tetra valent actinide resin, TEVA resin) and acid solutions (HF-HCl and HF-HNO3 solutions) were determined to obtain suitable solution conditions for the separation of Mo from Zr and Nb. Based on the obtained Kd's, a chromatographic separation scheme was designed and applied to the digested solution of the simulated rubble sample. Consequently, Mo was successfully separated from Zr, Nb and other major metal ions of the simulated rubble sample.
为了能够对福岛第一核电站（FDNPS）废墟样本中的钼-93进行分析，开发了一种从废墟样本中的锆、铌和其他主要元素中分离钼的方法。尽管在一些研究中已经报道了钼-93的分析，但已知的分离方法繁琐且耗时，或者分析对象是简单物质。因此，本研究开发了一种用于分离复杂物质（即废墟样本）的简单快速方法。首先，评估了模拟废墟样本消解过程中钼的损失情况。接下来，测定了萃取色谱树脂（四价锕系元素树脂，TEVA树脂）与酸溶液（氢氟酸-盐酸和氢氟酸-硝酸溶液）之间锆、铌和钼的重量分配系数（Kd值），以获得从锆和铌中分离钼的合适溶液条件。基于所获得的Kd值，设计了一种色谱分离方案，并将其应用于模拟废墟样本的消解溶液中。结果，钼成功地从模拟废墟样本中的锆、铌和其他主要金属离子中分离出来。
