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CIPM MRA PARTICIPANTS
All data listed in the KCDB have been reviewed and approved within the CIPM Mutual Recognition Arrangement
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CIPM MRA PARTICIPANTS
Calibration and Measurement Capabilities – CMCs
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Key and supplementary comparisons
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Added keywords act as an additional filter. Keywords separated by a space will be treated by the logical function AND automatically. You may also use OR. Keyword searches also find close matches. Placing quotation marks (") before and after the search word, e.g. "word", will allow for exact matches.

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News
4 FEBRUARY 2026
Key comparison in organic analysis - CCQM
The Final report and results of the key comparison CCQM-K184 have been published in the KCDB. This is a comparison in organic analysis on low-polarity analytes in abiotic matrix (PAHs in sediments) in the field of Chemistry and biology, piloted by the National Institute of Metrology (NIM), China in which 17 state economies participated.
4 FEBRUARY 2026
Key Comparison in Electrochemistry - CCQM
The Final report and results of CCQM-K73.2018.4 linked to CCQM-K73.2018 have been published in the KCDB. This is a comparison on the determination of the concentration of H+ in hydrochloric acid solution. The comparison was coordinated by Physikalisch-Technische Bundesanstalt (PTB), Germany, with participants from 3 state economies.
3 FEBRUARY 2026
Key comparison on nucleic acid analysis - CCQM
The results of the key comparison CCQM-K181 have been published in the KCDB. This is a comparison of SARS-CoV-2 RNA copy number quantification in the field of Chemistry and biology, piloted by National Institute of Metrology (NIM), China in which 15 state economies participated.
3 FEBRUARY 2026
Key Comparison of air kerma in mammography X-ray beams – APMP
The Final report of the key comparison APMP.RI(I)-K7 comparison has been approved and published in the KCDB. This is a comparison of air kerma in mammography X-Ray beams in the field of dosimetry in Ionizing radiation in which 3 state economies participated. The NIM, China and NMIJ/AIST, Japan acted as the linking laboratories for linking the results of the APMP.RI(I)-K7 participants to BIPM.RI(I)-K7.
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Statistics
AFRIMETS APMP COOMET EURAMET GULFMET SIM
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Currently in the KCDB there are
258 CIPM MRA participants
1263 key comparisons
26517 CMCs
766 supplementary comparisons