Consultative Committee for Amount of Substance: Metrology in Chemistry and Biology (CCQM)
List of meetings
Meetings and related documents
- From 27 to 28
CCQM Workshop BUTTON
Pilot Studies BUTTON
The CCQM is responsible for developing, improving and documenting the equivalence of national standards (certified reference materials and reference methods) for chemical and biological measurements. It advises the CIPM on matters related to chemical and biological measurements including advice on the BIPM scientific programme activities.
The responsibilities of the CCQM are:
- to establish global comparability of measurement results through promoting traceability to the SI, and where traceability to the SI is not yet feasible, to other internationally agreed references;
- to contribute to the establishment of a globally recognized system of national measurement standards, methods and facilities for chemical and biological measurements;
- to contribute to the implementation and maintenance of the CIPM MRA with respect to chemical and biological measurements;
- to review and advise the CIPM on the uncertainties of the BIPM's calibration and measurement services as published on the BIPM website;
- to act as a forum for the exchange of information about the research and measurement service delivery programmes and other technical activities of the CC members and observers, thereby creating new opportunities for collaboration.
Happy World Metrology Day 2023 !
The Consultative Committee for Amount of Substance: Metrology in Chemistry and Biology (CCQM) is happy to present a series of short recordings covering the importance of metrological traceability and equivalence of measurements in food safety, trade and authenticity.
Key comparison demonstrates accuracy of N2O in Air Greenhouse Gas Standards
The comparison of nitrous oxide in air standards from ten laboratories has demonstrated reference value uncertainties of 0.1 nmol/mol to 0.3 nmol/mol, for the third most important greenhouse gas in the atmosphere. Globally averaged atmospheric amount fractions have surpassed 334.5 nmol/mol and annual growth rates exceed 1 nmol/mol.
Octad of standards for qNMR purity measurements
Publication of the benzoic acid reference document, together with seven others, provides guidance for the use of a universal suite of eight higher order SI-traceable primary standards, the Octad, for the purity assignment of organic compounds using qNMR in any solvent.