A new certified reference material for NORM in mineral aluminium ore (bauxite) – IAEA-493

IF 1.8 3区工程技术 Q3 CHEMISTRY, INORGANIC & NUCLEAR

Applied Radiation and Isotopes Pub Date : 2025-09-17 DOI:10.1016/j.apradiso.2025.112191

Ivana Vukanac , Bojan Seslak , Nesrine Mezerreg , Andjela Tokanovic , Cherry-May Abraham-Ponti , Monika Horsky , Dinka Besic , Alexander Trinkl , Jonathan Burnett , Zsuzsa Lehartne Vizi , Sandor Tarjan

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引用次数: 0

Abstract

The IAEA Terrestrial Environmental Radiochemistry (TERC) Laboratory supports Member States (MS) laboratories in enhancing the reliability of analytical measurement results through the provision of Reference Materials (RM), which can be used for the evaluation of measurement procedures, calibration, and for quality control purposes.

Radioactivity monitoring in the vicinity of mines, industrial facilities, and waste disposal sites is one of the tasks of testing laboratories, and the Certified Reference Material (CRM) IAEA-493 was produced to support this task at MS laboratories worldwide. Bauxite is a mineral ore used mostly for aluminium production and can be considered as Naturally Occurring Radioactive Material (NORM). Processing of bauxite can disturb the natural radiological burden of the environment and reliable radionuclide content determination is of crucial importance for environmental studies.

TERC is accredited to produce CRMs (ISO 17034) and production of IAEA-493 was in line with the standard's requirements. Sampling, homogenization, bottling, bulk homogeneity measurements, and a feasibility study were conducted in the IAEA Collaborating Centre – Radioanalytical Reference Laboratory, National Food Chain Safety Office, Hungary. Homogeneity and stability studies were performed in TERC. Characterization was performed by gamma-ray spectrometry in TERC and assigned values for ²³²Th, ²³⁸U, ²²⁶Ra, ²¹⁰Pb, ²³⁵U, ⁴⁰K, and ¹³⁷Cs activity concentration were confirmed by results reported from the expert laboratories who participated in the characterization study. Alpha-particle spectrometry of uranium isotopes performed in TERC additionally confirmed assigned values for these radionuclides. IAEA-493 was also used as a sample in TERC's Worldwide Proficiency Test (PT) Exercise in 2024.

The description of the CRM production and certification of activity concentrations of naturally occurring radionuclides in IAEA-493 is presented in this paper.114670.

查看原文本刊更多论文

一种新的铝矿（铝土矿）NORM认证标准物质——IAEA-493。

原子能机构陆地环境放射化学实验室（TERC）通过提供可用于评估测量程序、校准和质量控制目的的参考物质（RM），支持成员国实验室提高分析测量结果的可靠性。在矿山、工业设施和废物处理场附近进行放射性监测是测试实验室的任务之一，国际原子能机构认证标准物质(CRM) -493是为了支持全球MS实验室的这项任务而生产的。铝土矿是一种主要用于铝生产的矿物矿石，可以被认为是自然发生的放射性物质（NORM）。铝土矿的加工会干扰环境的自然辐射负荷，可靠的放射性核素含量测定对环境研究至关重要。TERC已通过ISO 17034标准认证，生产的IAEA-493符合标准要求。抽样、均质、装瓶、散装均质测量和可行性研究是在匈牙利国家食品链安全办公室原子能机构合作中心-放射分析参考实验室进行的。在TERC中进行了均匀性和稳定性研究。通过TERC中的伽马射线能谱法进行表征，参与表征研究的专家实验室报告的结果证实了232Th、238U、226Ra、210Pb、235U、40K和137Cs活性浓度的赋值。在TERC中进行的铀同位素α粒子谱法进一步证实了这些放射性核素的指定值。原子能机构-493也被用作2024年TERC全球能力测试（PT）演习的样本。本文介绍了国际原子能机构-493中自然存在的放射性核素活性浓度的CRM生产和认证情况。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Applied Radiation and Isotopes 工程技术-核科学技术

CiteScore

3.00

自引率

12.50%

发文量

406

审稿时长

13.5 months

期刊介绍： Applied Radiation and Isotopes provides a high quality medium for the publication of substantial, original and scientific and technological papers on the development and peaceful application of nuclear, radiation and radionuclide techniques in chemistry, physics, biochemistry, biology, medicine, security, engineering and in the earth, planetary and environmental sciences, all including dosimetry. Nuclear techniques are defined in the broadest sense and both experimental and theoretical papers are welcome. They include the development and use of α- and β-particles, X-rays and γ-rays, neutrons and other nuclear particles and radiations from all sources, including radionuclides, synchrotron sources, cyclotrons and reactors and from the natural environment. The journal aims to publish papers with significance to an international audience, containing substantial novelty and scientific impact. The Editors reserve the rights to reject, with or without external review, papers that do not meet these criteria. Papers dealing with radiation processing, i.e., where radiation is used to bring about a biological, chemical or physical change in a material, should be directed to our sister journal Radiation Physics and Chemistry.