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ISO - DIS 33403

Guidance for the use of reference materials

pending, Most Current
Organization: ISO
Publication Date: 10 January 2023
Status: pending
Page Count: 36
ICS Code (Chemical reagents): 71.040.30
scope:

This document describes good practice in using reference materials (RMs), and certified reference materials (CRMs) in particular, in measurement processes. These uses include the assessment of precision and trueness of measurement methods, quality control, assigning values to materials, calibration, and the establishment of conventional scales. This document also relates key characteristics of various types of RMs to the different applications.

For CRMs, the metrological traceability of the property values to international scales or other measurement standards has been established. For RMs not being CRMs, this kind of traceability of property values has often not been established. Nevertheless, these RMs can still be used for assessing parts of measurement procedures, including evaluating various levels of precision.

Mainstream applications of RM include precision control (Clause 8), bias assessment (Clause 9), calibration (Clause 10), preparation of calibration RMs (Clause 11) and maintaining conventional scales (Clause 12). Not all types of RMs can be used for all indicated purposes.

The preparation of RMs for calibration is also part of the scope of ISO 17034[1] and ISO Guide 35.[2] The treatment in this document is limited to the fundamentals of small-scale preparation of RMs and the value assignment, as used by laboratories to calibrate their equipment. Larger scale production of such RMs, with the possible aim of distribution is beyond the scope of this document. This type of activity is covered in ISO 17034[1] and ISO Guide 35[2].

Document History

DIS 33403
January 10, 2023
Guidance for the use of reference materials
This document describes good practice in using reference materials (RMs), and certified reference materials (CRMs) in particular, in measurement processes. These uses include the assessment of...

References

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