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The provision and use of traceability statements for reference materials
Accreditation and Quality Assurance ( IF 0.9 ) Pub Date : 2020-11-09 , DOI: 10.1007/s00769-020-01450-8
Mike Sargent

Reference material certificates prepared in accordance with ISO 17034:2016 must include a statement of metrological traceability for each certified value. Users of these materials are required by accreditation bodies and other organisations to request the provision of such statements and to ensure that the stated traceability is fit for the intended use of the material. However, ISO 17034:2016 says nothing about the format to be adopted for such statements. Several possibilities are described in guidance documents published by the ISO Committee for Reference Materials (ISO/REMCO) but these sometimes lack clarity and consistency. One reason for this is the absence of a clear consensus on the appropriate content of such statements. The UK Reference Materials Working Group has addressed this situation with an extensive discussion of the issues. This paper summarises the Group’s conclusions on the purpose, drafting and interpretation of traceability statements for certified values of reference materials, including matrix materials, pure calibrants and calibration solutions. It will be of interest to producers and users of reference materials and also accreditation bodies which accredit facilities to the conformity assessment standards ISO 17034:2016 and ISO/IEC 17025:2017. The document includes a brief overview of four aspects of traceability which impact the preparation of traceability statements: the basis of metrological traceability; the reason for adopting traceable measurements; the type of information on traceable values required by users of reference materials; and how to present information on traceability in the form of a traceability statement.

中文翻译:

标准物质溯源性声明的提供和使用

根据 ISO 17034:2016 准备的标准物质证书必须包括每个认证值的计量可追溯性声明。认证机构和其他组织要求这些材料的用户要求提供此类声明,并确保声明的可追溯性适合材料的预期用途。但是,ISO 17034:2016 没有说明此类声明要采用的格式。ISO 参考材料委员会 (ISO/REMCO) 发布的指导文件中描述了几种可能性,但这些有时缺乏清晰度和一致性。原因之一是对此类声明的适当内容缺乏明确的共识。英国参考材料工作组通过对这些问题的广泛讨论来解决这种情况。本文件总结了小组关于标准物质(包括基质材料、纯校准物和校准溶液)认证值溯源性声明的目的、起草和解释的结论。参考材料的生产商和用户以及根据合格评定标准 ISO 17034:2016 和 ISO/IEC 17025:2017 对设施进行认证的认证机构都会感兴趣。该文件简要概述了影响追溯声明编制的追溯的四个方面:计量追溯的基础;采用可追溯测量的原因;标准物质使用者要求的溯源值信息类型;以及如何以可追溯性声明的形式呈现有关可追溯性的信息。
更新日期:2020-11-09
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