Kemiteknik

This document provides guidance on technical considerations for the production of pure organic substance certified reference materials (CRMs) that are used by laboratories to calibrate measurement
equipment and procedures and to establish metrological traceability of the respective results. The guidance is relevant only to CRMs comprising organic compounds whose structures are specifically defined, where polymeric materials are not included. Recommendations are given specifically for the production of such CRMs in accordance with the general requirements of ISO 17034.
In this document, reference to a CRM is limited to pure organic substance certified reference materials including their candidate materials unless otherwise noted.
Terminology related to such CRMs is defined.

This document specifies a laboratory method for obtaining water samples from treated wood which has been in conditions designed to simulate continuous contact with the ground or with water (use Class 4 or 5), at time intervals after exposure.

1.1 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.
1.2 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.
1.3 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.
1.4 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].

This International Standard is intended to help reference material producers (RMPs) in preparing clear and concise documentation to accompany a reference material (RM). It lists and explains mandatory, recommended and other categories of information to be considered in the preparation of
product information sheets and RM certificates. This information can be used by RM users and other stakeholders in confirming the suitability of an RM or certified reference material (CRM).
This International Standard also contains the minimum requirements for a label attached to the container of an individual RM unit.