ISO GUIDE 35

Reference materials - Guidance for characterization and assessment of homogeneity and stability

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Organization: ISO
Publication Date: 1 August 2017
Status: active
Page Count: 114
ICS Code (Chemical reagents): 71.040.30
scope:

This document explains concepts and provides approaches to the following aspects of the production of reference materials:

- the assessment of homogeneity;

- the assessment of stability and the management of the risks associated with possible stability issues related to the properties of interest;

- the characterization and value assignment of properties of a reference material;

- the evaluation of uncertainty for certified values;

- the establishment of the metrological traceability of certified property values.

The guidance given supports the implementation of ISO 17034. Other approaches may also be used as long as the requirements of ISO 17034 are fulfilled.

Brief guidance on the need for commutability assessment (6.11) is given in this document, but no technical details are provided. A brief introduction for the characterization of qualitative properties (9.6 to 9.10) is provided together with brief guidance on sampling such materials for homogeneity tests (Clause 7). However, statistical methods for the assessment of the homogeneity and stability of reference materials for qualitative properties are not covered. This document is also not applicable to multivariate quantities, such as spectral data 

Document History

ISO GUIDE 35
August 1, 2017
Reference materials - Guidance for characterization and assessment of homogeneity and stability
This document explains concepts and provides approaches to the following aspects of the production of reference materials: - the assessment of homogeneity; - the assessment of stability and the...
January 1, 2006
Reference materials - General and statistical principles for certification
This Guide gives statistical principles to assist in the understanding and development of valid methods to assign values to properties of a reference material, including the evaluation of their...
January 1, 1989
Certification of Reference Materials - General and Statistical Principles
A description is not available for this item.

References

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