CIPM MRA Comparison reports

Starting end of 2025 and in accordance with the Decision CIPM/113-29 (2024), the CIPM MRA Comparison reports (key comparisons, supplementary comparisons, pilot studies) will be published on this webpage.

Previous reports published as Technical Supplements in Metrologia are available here.

Asset Publisher

Year

Metrology Area

Optical fibre length

S.D. Lim, K.S. Hong, J. Zhang, K. Amemiya, J. Durbard, M. Nel, P. Jivan, J. Morel, V. Kravtsov, O. Terra et al

https://doi.org/10.59161/DIHH8181

Published: 2026

Realization of the aluminium freezing-point temperature

P. Saunders, E. Webster, I. Yang, W. Joung, J. Sun, J.C.P. Cheung, N.B. MD Ali, E. Ejigu, C. Yaokulbodee, P. Panpech et al

https://doi.org/10.59161/ZHMZ7323

Published: 2026

Realization of the ITS-90 at 692.677 K (Zn FP)

R. Veltcheva, J. Pearce, S. Dedyulin, A. Peruzzi

https://doi.org/10.59161/KAXC2980

Published: 2026

Gauge Block by Mechanical Comparison

D. Bellelli, C.C. Castellanos, M. Villiesid Alonso, K. Lemessy, A. Rocha, G. Burgos, E. Condor, C. García, P. Suazo, A. Illanes et al

https://doi.org/10.59161/AGUW4558

Published: 2026

Gauge blocks measured by with mechanical probing techniques

J. Campbell, B. Eves, C. Castellanos, R. Morales, D. Cano, W. Barros, E. Stanfield, D. Plazas

https://doi.org/10.59161/ZECS3134

Published: 2026

Angle standards : optical polygon

B.J. Eves, W. Shihua, M.D.M.P. Hernandez, F.H. Yshikawa, L.H.B. Vieira, M. Astrua, Y.Y. Lee, Z. Xue, T. Watanabe, T. Yandayan

https://doi.org/10.59161/KETH1559

Published: 2026

Activity of the radionuclide 99Tc per unit mass of aqueous solution

A.K. Pearce, T. Altzitzoglou, A. Antohe, P. Arenillas, E. Bakhshandeiar, D. Bergeron, C. Bobin, M. Capogni, P. Cassette, R. Collé et al

https://doi.org/10.59161/ZXXI7394

Published: 2026

Air kerma in Cs-137 radiation protection beams

L. Persson, J. Lillhök, N. Cornejo Díaz, M. Kelly, E. Hansen, P. Hetland, R. Nylund, J. Huikari

https://doi.org/10.59161/WVBQ64790

Published: 2026

Air kerma in Am-241 and Co-60 radiation protection beams

L. Persson, J. Lillhök, N.A. Cornejo Díaz, M. Kelly, E.L. Hansen, P.O. Hetland, R. Nylund, J. Huikari

https://doi.org/10.59161/SZYA6566

Published: 2026

Measurement of air kerma for Cobalt 60

C. Kessler, S. Pojtinger

https://doi.org/10.59161/IKSF5450

Published: 2026

Measurement of air kerma in mammography beams

S. Guo, J. Wu, T. Tanaka, T.T. Huang, S. Jozela, Z. Msimang, J. Cardoso

https://doi.org/10.59161/NBER7690

Published: 2026

Realization of the kilogram

M. Stock, P. Conceição, H. Fang, F. Bielsa, A. Kiss, Y.H. Wu, S.J. Shen, L. Tsao, S.J. Chen, M. Thomas et al

https://doi.org/10.59161/QOFV3225

Published: 2026

Torque measurements

B. Lefranc, P. Averlant, B. Lefranc, P. Averlant, C. Schlegel, C. Schlegel

https://doi.org/10.59161/VJIB3350

Published: 2026

Carbon dioxide in nitrogen

J. Viallon, P. Moussay, R. Wielgosz, M. Valkova

https://doi.org/10.59161/OHVC2544

Published: 2026

Assay of sodium carbonate

M. Máriássy, Z. Hanková, P.P. Borges, S. Pereira Sobral, D. Nagy, Z. Nagyné Szilágyi, T. Orwa, S. Kachila

https://doi.org/10.59161/CJNO5613

Published: 2026

pH measurement of phosphate buffer solutions

M.A. Oh, K. Jo, S.W. Heo, F. Bastkowski, B. Sander

https://doi.org/10.59161/YSBU4088

Published: 2026

Electrolytic Conductivity at 0.5 S m-1 and 20 S m-1

S. Seitz, A. Snedden, J. Dumańska, Z. Hanková, M. Vičarová, O. Stennik, T. Orwa, A. Galli, H. Wang, A. Hindayani et al

https://doi.org/10.59161/PUOX8830

Published: 2026

Natural toxic elements (Cd, Pb) in cacao powder

P. Grinberg, K. Nadeau, K. Leblanc, C. Palmer, E. Pagliano, L. Yang, M.D.R.A.T. del Rocio Arvizu Torres, M. Pérez Urquiza, E. Valle Moya, F.J. Martínez Ríos et al

https://doi.org/10.59161/CLPD8240