铀矿地质样品中天然放射性核素比对分析结果的利用

doi:10.3969/j.issn.1000-1158.2017.03.25

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摘要以实验室日常分析副样为原料,经过配料、研磨、均匀性检查和多家实验室间比对验证,获得了8个铀矿地质样品（ALBRIUG-1～ALBRIUG-8）中总α、总β、238U、232Th、226Ra、210Po和40K比活度值。采用最小称样量（50 mg）的ICP-MS检查均匀性时,2个铀矿地质样品（ALBRIUG-1和ALBRIUG-8）的均匀性较好,符合标准物质要求,可作为实验室天然放射性核素分析质量控制样品使用;其余6个样品（ ALBRIUG-2～ALBRIUG-7）均匀性未达到标准物质要求,但样品放射性核素基本处于平衡状态,其铀镭平衡系数在0.988～1.079之间,可用于取样量较大（大于150g）的物理分析质量控制参考。

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	王铁健
	郭冬发
	李振涛
	朱明燕
	黄秋红
	谭靖
	谢胜凯
	夏晨光
	胡小华

关键词 ：计量学, 比活度, 铀矿地质, 天然放射性, 核素分析

Abstract：Eight uranium geological samples named ALBRIUG-1～ALBRIUG-8 have been prepared using expired archive samples as raw material, through proportioning, grinding, particle size examination and homogeneity testing. Through interlaboratory comparison, it has been determined that the specific activities of gross α, gross β,238U,232Th, 226Ra ,210Po and 40K in uranium geology samples prepared by the laboratory using physical and chemical analytical methods. The homogeneity testing by ICP-MS with minimum sample weighing (50mg) shows that two samples named ALBRIUG-1 and ALBRIUG-8 are in homogeneity, in line with the requirements of reference materials, while the remaining six samples ALBRIUG-2～ALBRIUG-7 are not in homogeneity accordingly.The two samples can be used as quality control samples for analysis of natural radionuclides in uranium geology samples. The radionuclides in the sample ALBRIUG-2 to ALBRIUG-7 are basically in a state of equilibrium, the uranium-radium equilibrium coefficient are from 0.988 to 1.079. They may be used as quality control when using physical analysis with sampling volume larger than 150g.

Key words： metrology specific activity uranium geology natural radionuclide radionuclide analysis

收稿日期: 2015-06-12 发布日期: 2017-04-19

PACS:

TB98

基金资助:中核集团地矿事业部资助(测D-2011)

通讯作者: 郭冬发 E-mail: guodongfa@briug.cn

作者简介: 王铁健(1987-),男,湖南湘潭人,核工业北京地质研究院工程师,从事放射性核素测量工作。jywang05@sina.com

引用本文:

王铁健,郭冬发,李振涛,朱明燕,黄秋红,谭靖, 谢胜凯,夏晨光,胡小华. 铀矿地质样品中天然放射性核素比对分析结果的利用[J]. 计量学报, 2017, 38(3): 367-379.
WANG Tie-jian,GUO Dong-fa,LI Zhen-tao,ZHU Ming-yan,HUANG Qiu-hong,TAN Jing,XIE Sheng-kai,XIA Chen-guang,HU Xiao-hua. Utilization of Results for Interlaboratory Comparison Analysis of Natural Radionuclides in Uranium Geology Samples. Acta Metrologica Sinica, 2017, 38(3): 367-379.

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http://jlxb.china-csm.org:81/Jwk_jlxb/CN/10.3969/j.issn.1000-1158.2017.03.25 或 http://jlxb.china-csm.org:81/Jwk_jlxb/CN/Y2017/V38/I3/367