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<p>An estuarine sediment IAEA-158 developed by the Marine Environment Laboratories of the International Atomic Energy Agency (IAEA), originally produced in 2008 as a reference material through an interlaboratory comparison, has now been recertified as certified reference material IAEA-158A in accordance with ISO 17034:2016 and ISO 33405:2024 principles. The recertification process involved a comprehensive homogeneity and stability assessment, followed by an extensive characterization campaign to ensure accuracy and consistency. The newly certified material includes 27 analytes covering major elements (MEs), trace elements (TEs) and rare earth elements (REEs). Although REEs are chemically a specific subgroup of trace elements, they are considered here as a distinct analyte group due to their coherent geochemical behavior and analytical relevance. In addition, information values were assigned for 21 analytes, including methylmercury (MeHg). By meeting ISO 17034:2016 requirements, IAEA-158A guarantees traceability and realistic uncertainty budget, making it a valuable quality assurance tool for laboratories worldwide. This paper details complete preparation procedure and scientific approach used for the recertification of IAEA-158A.</p>

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Recertification of the estuarine sediment certified reference material IAEA-158A in accordance with ISO 17034:2016 and ISO 33405:2024

  • 期刊论文

  • 发表日期：

    2026年6月25日

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  • Sabine Azemard,
  • Anna Maria Orani,
  • Katarzyna Katarzyna Sobiech-Matura,
  • Philippe Bersuder

摘要

An estuarine sediment IAEA-158 developed by the Marine Environment Laboratories of the International Atomic Energy Agency (IAEA), originally produced in 2008 as a reference material through an interlaboratory comparison, has now been recertified as certified reference material IAEA-158A in accordance with ISO 17034:2016 and ISO 33405:2024 principles. The recertification process involved a comprehensive homogeneity and stability assessment, followed by an extensive characterization campaign to ensure accuracy and consistency. The newly certified material includes 27 analytes covering major elements (MEs), trace elements (TEs) and rare earth elements (REEs). Although REEs are chemically a specific subgroup of trace elements, they are considered here as a distinct analyte group due to their coherent geochemical behavior and analytical relevance. In addition, information values were assigned for 21 analytes, including methylmercury (MeHg). By meeting ISO 17034:2016 requirements, IAEA-158A guarantees traceability and realistic uncertainty budget, making it a valuable quality assurance tool for laboratories worldwide. This paper details complete preparation procedure and scientific approach used for the recertification of IAEA-158A.