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Determination of ultra-low level plutonium isotopes (Pu-239,(240)pu) in environmental samples with high uranium
Xing, S (Xing, Shan)[ 1,3 ]; Zhang, WC (Zhang, Weichao)[ 1 ]; Qiao, JX (Qiao, Jixin)[ 2 ]; Hou, XL (Hou, Xiaolin)[ 1,2 ]
2018-09-01
Source PublicationTalanta
Volume187Pages:357-364
Subtype期刊论文
Abstract

In order to measure trace plutonium and its isotopes ratio (240Pu/239Pu) in environmental samples with a high uranium, an analytical method was developed using radiochemical separation for separation of plutonium from matrix and interfering elements including most of uranium and ICP-MS for measurement of plutonium isotopes. A novel measurement method was established for extensively removing the isobaric interference from uranium (238U1H and 238UH2+) and tailing of 238U, but significantly improving the measurement sensitivity of plutonium isotopes by employing NH3/He as collision/reaction cell gases and MS/MS system in the triple quadrupole ICP-MS instrument. The results show that removal efficiency of uranium interference was improved by more than 15 times, and the sensitivity of plutonium isotopes was increased by a factor of more than 3 compared to the conventional ICP-MS. The mechanism on the effective suppress of 238U interference for 239Pu measurement using NH3-He reaction gases was explored to be the formation of UNH+ and UNH2+ in the reactions of UH+ and U+ with NH3, while no reaction between NH3 and Pu+. The detection limits of this method were estimated to be 0.55 fg mL-1 for 239Pu, 0.09 fg mL−1 for 240Pu. The analytical precision and accuracy of the method for Pu isotopes concentration and 240Pu/239Pu atomic ratio were evaluated by analysis of sediment reference materials (IAEA-385 and IAEA-412) with different levels of plutonium and uranium. The developed method were successfully applied to determine 239Pu and 240Pu concentrations and 240Pu/239Pu atomic ratios in soil samples collected in coastal areas of eastern China.

KeywordIcp-ms/ms Collision/reaction Cell Nh3/he Model Plutonium Isotopes Environmental Samples Isobaric Interference Of Uranium
DOI10.1016/j.talanta.2018.05.051
Indexed BySCI
Language英语
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/9561
Collection加速器质谱中心
Corresponding AuthorHou, XL (Hou, Xiaolin)[ 1,2 ]
Affiliation1.State Key Laboratory of Loess and Quaternary Geology, Shaanxi Key Laboratory of Accelerator Mass Spectrometry Technology and Application, Xi’an AMS Center,Institute of Earth Environment, Chinese Academy of Sciences, Xi’an, China;
2.Technical University of Denmark, Center for Nuclear Technologies, Risø Campus, Roskilde, Denmark;
3.China Institute of Radiation Protection, Taiyuan, China
Recommended Citation
GB/T 7714
Xing, S ,Zhang, WC ,Qiao, JX ,et al. Determination of ultra-low level plutonium isotopes (Pu-239,(240)pu) in environmental samples with high uranium[J]. Talanta,2018,187:357-364.
APA Xing, S ,Zhang, WC ,Qiao, JX ,&Hou, XL .(2018).Determination of ultra-low level plutonium isotopes (Pu-239,(240)pu) in environmental samples with high uranium.Talanta,187,357-364.
MLA Xing, S ,et al."Determination of ultra-low level plutonium isotopes (Pu-239,(240)pu) in environmental samples with high uranium".Talanta 187(2018):357-364.
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