Determination of 235U/238U ratio in uranium particles by laser ablation multi-collector inductively coupled plasma mass spectrometry

被引：0

作者：

Wang W. ^{[1
]}

Li Z.-M. ^{[1
]}

Xu J. ^{[1
]}

Zhou G.-Q. ^{[1
]}

Wang F. ^{[2
]}

Shen X.-P. ^{[1
]}

Zhai L.-H. ^{[1
]}

Ke C.-F. ^{[1
]}

机构：

[1] Northwest Institute of Nuclear Technology, Xi'an

[2] China Institute of Atomic Energy, Beijing

来源：

Journal of Chinese Mass Spectrometry Society | 2016年 / 37卷 / 03期

关键词：

!sup]235[!/sup]U/[!sup]238[!/sup]U ratio; Laser ablation multi-collector inductively coupled plasma mass spectrometer (LA-MC-ICP-MS); Uranium particles;

D O I：

10.7538/zpxb.youxian.2016.0014

中图分类号：

学科分类号：

摘要：

Analysis of uranium particles is extremely important for nuclear safeguards and nuclear forensics. This work described the technical advancements for the direct analysis of 235U/238U ratios in uranium particles by laser ablation multi-collector inductively coupled plasma mass spectrometer (LA-MC-ICP-MS), including loading and localization of uranium particles, evaluation and correction of mass fractionation, analysis of particles smaller than 10 μm. Micrometer-sized uranium particles could be efficiently transferred to a tape covered with copper net by using micromanipulation method. Two methods, including the external standardization method based on GBW04234 and standard sample bracketing (SSB) method based on the combination LA-MC-ICP-MS with DSN (Desolution Nebulizer), were established to correct the mass fractionation. The analytical results show that the relative expanded uncertainty of 235U/238U isotope ratio in CRM124-1 samples is less than 0.14% (k=2), and the results agree with certificated value within uncertainty range. The LA-MC-ICP-MS technique developed offers an accurate and precise possibility for the 235U/238U ratio determination of uranium particles with size down to 5 μm. The relative expanded uncertainty of 0.64% (k=2) is achievable. © 2016, Editorial Board of Journal of Chinese Mass Spectrometry Society. All right reserved.

引用

页码：213 / 221

页数：8

共 20 条

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