ISO TR 16476-2016 PDF

Full title and description

ISO/TR 16476:2016 — Reference materials — Establishing and expressing metrological traceability of quantity values assigned to reference materials. A technical report providing guidance on how to establish, demonstrate and report metrological traceability for values assigned to reference materials (including certified reference materials), with examples and recommendations for documentation and certificates accompanying such materials.

Abstract

This technical report examines principles and practical approaches for establishing metrological traceability of quantity values assigned to reference materials. It reviews existing definitions of traceability (as given in international metrology guidance), develops a widely applicable approach for understanding traceability for assigned RM values, and gives recommendations on how traceability should be established, demonstrated and presented on certificates and other accompanying documentation. The report also provides examples for measurement procedures and situations not fully covered by earlier guidance.

General information

• Status: Withdrawn (catalogue status: Withdrawn).
• Publication date: June 2016 (Edition 1).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 71.040.30 (Reference materials / chemical reagents).
• Edition / version: Edition 1 (2016).
• Number of pages: 23.

Scope

Provides guidance on the conceptual and practical aspects of establishing and expressing metrological traceability for quantity values assigned to reference materials (RMs and CRMs). The scope includes a study of existing traceability principles, development of a clear and broadly applicable approach to traceability for assigned RM values, and recommendations for how traceability should be documented and reported on certificates and accompanying documentation. The report addresses cases and measurement procedures not fully covered in prior guidance documents.

Key topics and requirements

• Principles and definition of metrological traceability as applied to values assigned to reference materials.
• Recommended approaches for establishing traceability chains for RM property values.
• Demonstration and documentation of traceability, including information to appear on certificates and accompanying documents.
• Treatment and reporting of measurement uncertainty associated with assigned values.
• Examples and case studies for measurement procedures not previously covered by other guidance.
• Practical recommendations for RM producers, users and accreditation bodies on traceability reporting.

Typical use and users

Used by producers of reference materials and certified reference materials, analytical and calibration laboratories, accreditation bodies, national metrology institutes and metrologists, regulators and standardization bodies. The report is intended as practical guidance for those who assign values to RMs, prepare certificates and accompanying documentation, or assess the metrological traceability and uncertainty of assigned values.

Related standards

Documents and standards commonly used alongside ISO/TR 16476 include ISO 17034 (requirements for the competence of reference material producers), ISO Guide 30 (terms and definitions for reference materials) and related ISO/REMCO guidance, the VIM/JCGM 200 series (vocabulary and definitions for metrology), ISO/IEC Guide 99, ISO Guide 35 (approaches for characterization and value assignment — now evolved within the ISO 33400-series work), ISO 17025 (competence of testing and calibration laboratories), and other ISO/REMCO technical reports on reference materials (for example ISO/TR 79, ISO/TR 10989 and ISO/TR 11773).

Keywords

reference material; certified reference material; metrological traceability; value assignment; measurement uncertainty; certificate; RM producer; traceability chain; metrology; RM documentation.

FAQ

Q: What is this standard?

A: ISO/TR 16476:2016 is a Technical Report offering guidance on establishing and expressing metrological traceability for quantity values assigned to reference materials (RMs and CRMs).

Q: What does it cover?

A: It covers principles, practical approaches and recommendations for establishing traceability chains, demonstrating and documenting traceability (including certificate content), and reporting associated uncertainty for values assigned to reference materials; it also gives examples for situations not covered by earlier guidance.

Q: Who typically uses it?

A: Producers of reference materials, analytical and calibration laboratories, accreditation bodies, national metrology institutes, regulators and others involved in assigning, using or assessing values of reference materials.

Q: Is it current or superseded?

A: The document’s catalogue status is Withdrawn. Although the report was published in June 2016, users should consult the current ISO/TC 334 portfolio and more recent ISO publications and guides on reference materials and value assignment for up-to-date guidance (standards and technical reports relevant to RM production and documentation have been updated or reissued in the ISO/TC 334 programme since 2016).

Q: Is it part of a series?

A: ISO/TR 16476:2016 is one of several ISO/REMCO technical reports and guides addressing reference materials; it complements other REMCO/ISO TC 334 documents (for example guidance on RM vocabulary, certificates, production, homogeneity and stability) that together form the body of international guidance for reference materials.

Q: What are the key keywords?

A: Reference material, certified reference material, metrological traceability, assigned value, measurement uncertainty, traceability chain, RM certificate, RM producer.