High-Precision Determination of the 238U/235U Isotope Ratio in Rocks by Multicollector Inductively Coupled Plasma Mass Spectrometry
- 作者: Mandzhieva G.1, Sadasyuk A.1, Chernyshev I.1, Shatagin K.1, Chugaev A.1, Gareev B.2
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隶属关系:
- Institute of Geology of Ore Deposits, Petrography, Mineralogy and Geochemistry, Russian Academy of Sciences (IGEM RAS),
- Kazan (Volga region) Federal University
- 期: 卷 73, 编号 14 (2018)
- 页面: 1334-1342
- 栏目: Articles
- URL: https://journals.rcsi.science/1061-9348/article/view/182923
- DOI: https://doi.org/10.1134/S106193481814006X
- ID: 182923
如何引用文章
详细
The paper describes the high-precision U-isotope analysis of rocks. The analysis is based on multicollector inductively coupled plasma mass spectrometry (MC−ICP−MS) and includes, as an essential part, the three-step ion-exchange chromatography separation of uranium from chemically complex solutions. In the analysis, the 235U and 238U mass-bias of the MC−ICP−MS is corrected against the reference ratio of 233U and 236U in a double-spike added. The doublespiking precedes sample chemical digestion. This approach is useful as it corrects isotope data for a possible U-isotope fractionation that could have occurred in the chemical preparation of samples. The double-spike 236U/233U is 1.03183 ± 0.00005. The extraction procedure ensures uranium yield of more than 80%. The accuracy of the analysis was estimated by the study of 238U/235U in an international standard sample IRMM-3184 as well as in monitor samples. The uncertainty was estimated at ±0.008% (2SD), which is comparable with the accuracy of the results previously published by foreign researches. The analysis was elaborated for studying natural 238U/235U ratio variations. It was used by the authors for the high-precision determination of the U-isotope composition in rocks (granites, shales, volcanic rocks) and U-bearing minerals.
作者简介
G. Mandzhieva
Institute of Geology of Ore Deposits, Petrography, Mineralogy and Geochemistry, Russian Academy of Sciences (IGEM RAS),
编辑信件的主要联系方式.
Email: gilyanius@mail.ru
俄罗斯联邦, Moscow, 119017
A. Sadasyuk
Institute of Geology of Ore Deposits, Petrography, Mineralogy and Geochemistry, Russian Academy of Sciences (IGEM RAS),
Email: gilyanius@mail.ru
俄罗斯联邦, Moscow, 119017
I. Chernyshev
Institute of Geology of Ore Deposits, Petrography, Mineralogy and Geochemistry, Russian Academy of Sciences (IGEM RAS),
Email: gilyanius@mail.ru
俄罗斯联邦, Moscow, 119017
K. Shatagin
Institute of Geology of Ore Deposits, Petrography, Mineralogy and Geochemistry, Russian Academy of Sciences (IGEM RAS),
Email: gilyanius@mail.ru
俄罗斯联邦, Moscow, 119017
A. Chugaev
Institute of Geology of Ore Deposits, Petrography, Mineralogy and Geochemistry, Russian Academy of Sciences (IGEM RAS),
Email: gilyanius@mail.ru
俄罗斯联邦, Moscow, 119017
B. Gareev
Kazan (Volga region) Federal University
Email: gilyanius@mail.ru
俄罗斯联邦, Kazan, 420008