环境样品中铀同位素的ICP-MS测量方法研究

辐射防护 ›› 2018, Vol. 38 ›› Issue (4): 270-274.

环境样品中铀同位素的ICP-MS测量方法研究

李思璇¹, 黄雯娜², 王钟堂³, 郭秋菊¹

1.北京大学物理学院国家核物理与核技术国家重点实验室,北京 100871;
2.浙江省辐射环境监测站,杭州 310012;
3.核物理与化学研究所中国工程物理研究院,四川绵阳 621900

收稿日期:2017-12-03 出版日期:2018-07-20 发布日期:2020-07-28
通讯作者: 郭秋菊。E-mail: qjguo@pku.edu.cn
作者简介:李思璇(1994—),女,2017年毕业于北京大学物理学院,现为北京大学物理学院辐射防护与环境保护专业在读博士生。E-mail: sxli@pku.edu.cn

Measurement of uranium isotopes in environmental samples by ICP-MS

LI Sixuan¹, HUANG Wenna², WANG Zhongtang³, GUO Qiuju¹

1. State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871;
2. Zhejiang Province Radiation Environmental Monitoring Center, Hangzhou 310012;
3. Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Sichuan Mianyang 621900

Received:2017-12-03 Online:2018-07-20 Published:2020-07-28

摘要/Abstract

摘要： 本文介绍了一种针对环境中水体、土壤及沉积物样品中铀同位素的ICP-MS测量方法。该方法通过萃取色谱法的应用对环境样品中的铀进行了分离纯化,实现了对环境中含量较少的²³⁴U、²³⁵U的同时、快速测量;所得²³⁴U、²³⁵U、²³⁸U方法探测限对土壤及沉积物而言分别为0.7 mBq/g、0.002 mBq/g、0.04 mBq/g,在水体样品测量中相应分别为0.000 1 Bq/L、6×10^-7 Bq/L、1×10^-5 Bq/L。进一步利用该方法对IAEA-443、IAEA-447、NIST-4357三种参考物质进行了测量,测量结果与参考值一致,平均回收率分别达到84.2%、93.4%、90.6%,验证了方法的有效性和准确性。

关键词: 铀, 同位素, 环境样品, ICP-MS

Abstract: A new method for simultaneous and fast determination of uranium isotopes (²³⁴U, ²³⁵U, and ²³⁸U) in environmental samples by ICP-MS has been developed. In this research, we employed an extraction chromatography for separation and purification of uranium from water, soil, and sediment samples. Low detection limits of this method are ultimately achieved. They are 0.7 mBq/g for ²³⁴U, 0.002 mBq/g for ²³⁵U, and 0.04 mBq/g for ²³⁸U in soil and sediment samples. In water samples they are 0.000 1 Bq/L, 6×10^-7 Bq/L, and 1×10^-5 Bq/L respectively. This method is validated by analyzing seawater reference material IAEA-443, soil reference material IAEA-447, and sediment reference material NIST-4357 with average recovery ratios of 84.2%, 93.4%, and 90.6% respectively. All results obtained correspond well to those certified values and corroborate the validity and veracity of this method.

Key words: uranium, isotopes, environmental samples, ICP-MS

中图分类号:

TL75+1

李思璇, 黄雯娜, 王钟堂, 郭秋菊. 环境样品中铀同位素的ICP-MS测量方法研究[J]. 辐射防护, 2018, 38(4): 270-274.

LI Sixuan, HUANG Wenna, WANG Zhongtang, GUO Qiuju. Measurement of uranium isotopes in environmental samples by ICP-MS[J]. RADIATION PROTECTION, 2018, 38(4): 270-274.

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