用UTEVA树脂分离铀-α谱仪测量铀同位素的分析方法

摘要/Abstract

摘要： 本文建立了一种盐酸体系下用UTEVA树脂分离铀、α谱仪测量铀同位素的分析方法。在600 ℃条件下灼烧4 h,通过混合酸和H₂O₂的联合使用,使样品中的铀全部转移至溶液中。加入抗坏血酸使样品溶液始终保持还原体系,通过UTEVA树脂后实现铀的分离纯化,电镀制源后利用α谱仪测量。使用掺标样品和真实气溶胶样品对分析流程进行了验证,测量结果与目标值吻合度好,化学回收率稳定且高于95%,其变异系数为±5%。

关键词: 铀同位素, 气溶胶, UTEVA 树脂, 还原体系

Abstract: An analysis procedure for the determination of uranium isotopes in aerosol samples using UTEVA resin and alpha spectrometer in hydrochloric acid system was developed. Uranium was totally transferred to the solution by using mixed acids and H₂O₂ after fusing at 600 ℃ for 4 hours. Ascorbic acid was added to convert the sample solution to reduction system, and then uranium was purified by UTEVA resin column, followed by source electroplating and measurement with an alpha spectrometer. Spiked samples and real aerosol samples were analyzed to validate the procedure. All the measured results agreed very well with the target values. The chemical recoveries were stable and higher than 95% with coefficient variation of ±5%.

Key words: uranium isotopes, aerosol, UTEVA resin, reduction system

中图分类号:

O657.4

李周, 李鹏翔, 杨海兰, 马旭媛, 林海鹏, 高泽全, 韩玉虎, 任晓娜. 用UTEVA树脂分离铀-α谱仪测量铀同位素的分析方法[J]. 辐射防护, 2022, 42(2): 119-123.

LI Zhou, LI Pengxiang, YANG Hailan, MA Xuyuan, LIN Haipeng, GAO Zequan, HAN Yuhu, REN Xiaona. Determination of uranium isotopes in aerosol samples using UTEVA resin and alpha spectrometer[J]. RADIATION PROTECTION, 2022, 42(2): 119-123.

参考文献

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