71.040.30 - Chemical reagents

This document describes the classification, method of sample preparation, certification main rules and certificate content of the EURONORM-CRMs.
It also details the sample presentation of the various producers' organizations and the distributing sources.

ISO/Guide 35:2017 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 cert...view more

ISO/TR 16476:2016 investigates, discusses, and specifies further, the general principles of establishing traceability of measurement results laid down in the Joint BIPM, OIML, ILAC and ISO Declaration on Metrological Traceability [1], in particular for values assigned to (certified) reference materials. The document covers the following topics: a) a study into existing principles for, and requirements to, the traceability of the value assigned to the property of a (C)RM, with a specific view to ...view more

ISO/Guide 31:2015 is intended to help reference material (RM) producers in preparing clear and concise documentation to accompany an 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). ISO/Guide 31:2015 also contains the minimum requireme...view more

ISO 6142-1:2015 specifies a gravimetric method for the preparation of calibration gas mixtures in cylinders with traceable values for the amount-of-substance fraction (amount fraction) of one or more components. This part of ISO 6142 describes a method for calculating the uncertainty associated with the amount fraction of each component. This uncertainty calculation requires the evaluation of the contributions to the uncertainty due to factors including the weighing process, the purity of the co...view more

ISO/TR 79:2015 summarizes the state of the art of the production and certification or characterization of qualitative property reference materials (RMs). The need for guidance documents for the production of RMs certified for qualitative properties was recognized by many experts. At the same time, the available information was found to be too immature to develop an internationally accepted guidance document. Additionally, the lack of an international vocabulary for terms and definitions for qual...view more

ISO 6141:2015 specifies minimum requirements for the contents of certificates for homogeneous gas mixtures in gas cylinders to be used as calibration gas mixtures. Pure gases, when used as calibration gas mixtures, are also covered by this International Standard. Gases and gas mixtures produced for other purposes are not considered.
The requirements in ISO 6141:2015 deal with the metrological aspects of calibration gas mixtures. Other aspects, such as safety and legislative aspects, are not cov...view more

ISO Guide 30:2015 recommends terms and definitions that should be assigned to them when used in connection with reference materials, with particular attention to terms that are used in reference material certificates and corresponding certification reports.

ISO Guide 33:2015 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 Guide also relates key characteristics of various types of RMs to the different applications. For CRMs, the metrological traceability of the pro...view more

ISO 14595:2014 gives recommendations for single-phase certified reference materials (CRMs) used in electron probe microanalysis (EPMA). It also provides guidance on the use of CRMs for the microanalysis of flat, polished specimens. It does not cover organic or biological materials.

ISO Guide 80 outlines the essential characteristics of reference materials for quality control (QC) purposes, and describes the processes by which they can be prepared by competent staff within the facility in which they will be used (i.e. where instability due to transportation conditions is avoided). The content of this Guide also applies to inherently stable materials, which can be transported to other locations without risk of any significant change in the property values of interest. The pr...view more

ISO/TR 11773:2013 contains an inventory of problems and recommendations related to the transport, import and export of non-nuclear, non-radioactive reference materials, specifically for the packaging, labelling, and documenting of the shipments in order to comply with legal requirements. It does not explain detailed rules such as for labelling according to the Globally Harmonized System (GHS).

ISO/TR 16268:2009 specifies a procedure for the certification of the areic dose of an ion-implanted analyte element of atomic number larger than that of silicon retained in a working reference material (WoRM) intended for surface-analytical use. The WoRM is in the form of a polished (or similarly smooth-faced) wafer (also referred to as the host), of uniform composition and nominal diameter 50 mm or more, that has been ion-implanted with nominally one isotope of a chemical element (also referred...view more

ISO/TR 10989:2009 covers: the results of a study into, and comparison between, existing classification and categorization schemes for reference materials, the development of reference material (RM) features and characteristics upon which a harmonized and consistent categorization scheme could be based, and approaches for making the categorization scheme adaptive to new RM needs and developments. The development of a harmonized categorization scheme aims at facilitating a transparent and comparab...view more

This document describes the classification, method of sample preparation, certification main rules and certificate content of the EURONORM-CRMs.
It also details the sample presentation of the various producers' organizations and the distributing sources.

Provides methods for - determining the composition of a calibration gas mixture by comparison with appropriate reference gas mixtures, - calculating the uncertainty of the composition of calibration gas mixtures in relation to the known uncertainty of the composition of the reference gas mixtures with which they are compared, - validating the composition attributed to a calibration gas mixture by comparison with appropriate reference gas mixtures, - comparing the composition of several calibrati...view more

ISO 6144:2003 specifies a method for the preparation of calibration gas mixtures by a static volumetric method and provides a procedure for calculating the volumetric composition of the mixture. It can be used either with binary gas mixtures (containing one calibration component in a complementary gas, which is usually nitrogen or air) or with mixtures containing more than one component in the complementary gas. This International Standard also specifies how the expanded uncertainty in the volum...view more