ISO Guide 35:2017 PDF

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.

ISO Guide 35:2017 Referenced Document

ISO 3534-2 Statistics - Vocabulary and symbols - Part 2: Applied statistics
ISO 3534-3 Statistics-Vocabulary and symbols-Part 3:Design of experiments*， 2024-04-21 Update
ISO Guide 30 Reference materials — Selected terms and definitions — Amendment 1: Revisions of definitions for reference material and certified reference material
ISO/IEC Guide 99

2017 ISO Guide 35:2017 Certification of reference materials — General and statistical principles
2006 ISO GUIDE 35:2006 Reference materials - General and statistical principles for certification
1989 ISO GUIDE 35:1989 Certification of reference materials - General and statistical principles