Metrologia

Article	Citations
Key comparison CCQM-K179 - polar analyte in solid organic material: mass fraction of oxytetracycline hydrochloride salt	135
SIM supplementary comparison on calibration of conventional mass of a 20 kg weight	48
Final report of the supplementary comparison between NIMT and LNE on pressure standards in the range 50 MPa to 500 MPa of hydraulic gauge pressure	46
Report of the CCRI(II) supplementary international comparison of measurement of activity per unit mass of Cs-134 and Cs-137 in wheat flour (CCRI(II)-S13)	33
Final report on the EURAMET key comparison EURAMET AUV.V-K5	26
SIM Thermocouple Type S Supplementary Comparison	23
Key comparison of voltage unit standards based on the Josephson effect	22
Comparison of calibration of multimeter	22
Measurement of melting and freezing temperature of iron using radiation thermometry	21
Update of the BIPM comparison BIPM.RI(II)-K1.Ga-67 of activity measurements of the radionuclide 67Ga to include the 2023 result of the CMI (Czechia)	21
Report on EURAMET supplementary comparison on measurement of a 1 mm stage micrometer	20
Reply to Comment on ‘The Avogadro constant is not the defining constant of the mole’	19
Final report, ongoing key comparison BIPM.QM-K1, ozone at ambient level, comparison with EMPA, June 2023	19
Corrigendum: Detection and identification of faults in clock ensembles with the generalized likelihood ratio test (2022 Metrologia 59 045010)	18
Absolute frequency measurement of a Lu+ (3D1) optical frequency standard via link to international atomic time	18
Low-frequency calibration of accelerometers by rotation in the gravitational field at NIST	16
Bilateral Comparison of AC Programmable Josephson Voltage Standard (0.75 V rms and 7 V rms) between the PTB (Germany) and the BIPM, June 2025 (part of the ongoing BIPM key comparison BIPM.EM-K10.c a	16
Final report of CCQM-K96.2023: assay of potassium dichromate	15
Comparison of low air speed facilities	14
Final report of APMP.AUV.V-S1: supplementary comparison on calibration of laser tachometers using mechanical generators	14
Relating SI units to the ‘defining constants’	14
Key comparison BIPM.RI(I)-K2 of the air-kerma standards of the BFKH, Hungary, and the BIPM in low-energy x-rays	14
Final Report on key comparison EURAMET.M.P K4.2020 in the range from 1 Pa to 15 kPa of absolute and gauge pressure	14
Characterization of the LED filament lamp for luminous intensity calibration	13
CORRIGENDUM: Angles in the SI—a practical dimensional metrologist viewpoint * (2026 Metrologia  63 013	13

CIPM key comparison of viscosity CCM.V-K4	13
Comparison between four integer ambiguity resolved PPP GNSS time transfer software solutions	13
CCQM-K68.2019, nitrous oxide (N2O) in air, ambient level, final report	13
APMP key comparison of AC-DC current transfer standards: final report	13
Report on the APMP key comparison of hydrometer calibrations APMP.M.D-K4	12
Determining the calibration factor of Rn-220 by low-pressure scintillation cell	12
Discussion on the calculation of the uncertainties of [UTC-UTC(k)]	11
NTSC SrII optical lattice clock with uncertainty of 2	11
Key comparison BIPM.RI(I)-K7 of the air-kerma standards of the BFKH, Hungary, and the BIPM in mammography x-rays	11
International Comparison CCQM-K10.2018.1 - BTEX gas mixtures	11
Key comparison BIPM.RI(I)-K5 of the air-kerma standards of the GUM, Poland and the BIPM in 137Cs gamma radiation	11
Corrigendum: Uncertainty of the measurement of the frequency dependence of four-terminal pair capacitance with a four-channel vector network analyzer (2025 Metrologia	10
Comparison of blackbody for clinical infrared ear thermometers	10
Autocollimators: plane angle measurand ambiguities and the impact of surface form	10
CCM.G-K2.2023: CIPM key comparison of absolute gravimeters	10
Evaluations of the decay data of 40 K, 45 Ti, 56	10
High polarity analyte(s) in aqueous media: Determination of L-PFOA and L-PFOS in ground water	9
Series connection of quantum Hall resistance array and programmable Josephson voltage standard for current generation at one microampere	9
Final report on key comparison APMP.M.P-K7.2 in hydraulic gauge pressure from 10 MPa to 100 MPa	8
The forgotten (?) potentiometric method in thermometry	8
The unusual status of the hectare in the SI	8
Reply to Second Comment on ‘The Avogadro constant is not the defining constant of the mole’	8
Traceable characterisation of fibre-coupled single-photon detectors	8
Key comparison CCQM-K148.b - polar analyte in solid organic material: mass fraction of oxytetracycline	8
Gas viscosities from a semiconductor-manufacturing mass-flow controller	8
Final report for CCQM-P212: coherence of carbon isotope delta reference materials	8
Phase shifting angle interferometer	7
Ambient humidity, the overlooked influencer of radioactivity measurements	7
Measurement model of circadian action factor of phosphor-converted white LEDs based on photometric, electrical, and thermal properties	7
A proposal for three categories of units within the SI	7
Total radiant flux measurement of UV LEDs using a gonio-spectroradiometer	7
Application of a bandwidth correction method to thin-film reflectance measurements	7
Machine learning based priors for Bayesian inversion in MR imaging	7
Applying heat transport modelling to reduce measurement uncertainty of the LASP reference standard NACR8 *	7
Room temperature dual-mode internal quantum deficiency measurement with propagated uncertainty to 0.03% (k = 2)	6
Evaluations of the decay data of 57 Co, 76 Br, 133m	6
Bilateral comparison of 10 pF and 100 pF standards (ongoing BIPM key comparisons BIPM.EM-K14.a and 14.b) between the NMIM (Malaysia) and the BIPM	6
Linkage for Metrosert to CCT-K9 via the EURAMET-T.K9.1 bilateral comparison	6
Key comparison CCEM.RF-K27.W of RF power from 50 GHz to 75 GHz in rectangular waveguide	6
A simple tool for weighted averaging of inconsistent data sets	6
Multi-taper-based automatic correction of non-anechoic antenna measurements	6
Final report on the CCM key comparison of kilogram realizations CCM.M-K8.2021	6
Update of the BIPM comparison BIPM.RI(II)-K1.Co-57 of activity measurements of the radionuclide 57Co to include the 2023 result of the BEV (Austria)	6
Accurate characterisation of optical diffuse transmission—primary facility and extension to translucent samples	6
Method for traceable calibration of 5G NR measuring receivers	6
A new interpolation equation in the ITS-90 subrange from the triple point of water to the freezing point of indium	6
Evaluation of the transportable atom gravimeter HUST-QG	6
Accurate density measurement of a small solid sample using a combination of hydrostatic weighing and pressure-of-flotation methods	5
A proposal to change the leap-second adjustments to coordinated universal time	5
Comparison of PLTS-2000 and the magnetic field fluctuation thermometer at LNE-Cnam	5

Pilot study CCQM-P172 – spectroscopic methods for HNO3 value assignment	5
Lunar reference timescale	5
Calibration of GNSS stations for UTC	5
AFRIMETS.AUV.A-S2 final report, calibration of a multi-function acoustic calibrator	5
Final report, On-going Key Comparison BIPM.QM-K1, Ozone at ambient level, comparison with NIM Oct.2023	5
Precise high resistance comparison between the NMIJ traveling dual source bridge and the NIST adapted Wheatstone bridge	5
Final report, ongoing key comparison BIPM.QM-K1, ozone at ambient level, comparison with NIST, July 2022	5
Corrigendum: Accuracy evaluation of primary frequency standard NIST-F4 (2025 Metrologia  62 035002)	5
Precision measurement of an electron pump at 2 GHz; the frontier of small DC current metrology	5
Key comparison COOMET.QM-K120 "Carbon dioxide in air at urban level (480–800) μmol/mol"	5
Power of a test for assessing interlaboratory consensus of nominal and ordinal characteristics of a substance, material, or object	5
Precision control of resistive power in Kibble balance coils: an advanced method for minimizing temperature-related magnetic errors	5
Continuous GPS PPP-AR frequency transfer links	5
Erratum: Metrological characterization of a commercial single-photon source with high photon flux emission (2024 Metrologia 61 054001)	5
Final report of SIM supplementary comparison on testing machine calibration in compression up to 100 kN.	5
Measurement science meets the reproducibility challenge	5
First evaluation of the primary frequency standard NTSC-CsF2	5
Key comparison BIPM.RI(I)-K4 of the absorbed dose to water standards of the NMIJ, Japan, and the BIPM in 60Co gamma radiation	5
CCQM-P206, nitrous oxide (N2O) in air, ambient level, pilot study run in parallel with CCQM-K68.2019	4
Final report on the APMP regional comparison of type R thermocouples calibration at Cu, Co-C and Pd fixed points, APMP.T-S16	4
Key comparison BIPM.RI(I)-K5 of the air-kerma standards of the BEV, Austria and the BIPM in 137Cs gamma radiation	4
Measurement method of the solar diffuser bidirectional reflectance distribution function in the short-wave infrared band	4
International comparison CCQM-K3.2019 automotive exhaust gases	4
Monte Carlo uncertainty evaluation of gravimetric gas mixture with asymmetric distributions	4
Final report of CCQM-K96.2023.1: assay of potassium dichromate	4
Calibration of a step gauge (APMP.L-K5.n01)	4
Comparison report between NIM and CMS of the ITS-90 realization at the triple point of argon	4
Key comparison study - organic solvent calibration solution - gravimetric preparation and value assignment of deoxynivalenol (DON) in acetonitrile (ACN)	4
Key comparison BIPM.RI(I)-K8 of high dose-rate 192Ir brachytherapy standards for reference air kerma rate of the NIM and the BIPM	4
Report of the comparison BIPM.QM-K2.b, on carbon dioxide in nitrogen at ambient levels, with E+ E Elektronik (2025)	4
Final report on the CCM key comparison of density measurements of a silicon sphere (1 kg) by hydrostatic weighing (CCM.D-K1.2023)	4
Bilateral comparison of 1.018 V and 10 V standards between CSIR-NPL (India) and the BIPM, April to June 2022 (part of the ongoing BIPM key comparison BIPM.EM-K11.a and b)	4
Torque euramet supplementary comparison EURAMET.M.T-S4 (Euramet Project 1304) from 0.1 N·m to 5 N·m and from 5 N·m to 50 N·m	4
A two-capillary viscometer for temperatures up to 473 K and pressures up to 100 MPa—operation and verification at low pressure	4
CIPM key comparison CCPR-K1.a.2017 for spectral irradiance 250 nm to 2500 nm. Final report	4
Spectrophotometer-employed method for measuring luminous transmittance and haze	4
Assay of sodium carbonate	4
Bilateral comparison of irradiance scales between PMOD/WRC and PTB for longwave downward radiation measurements	4
Final report on EURAMET key comparison EURAMET.M.D-K2.2 (1523)	4
APMP key comparison of luminous intensity (APMP.PR-K3.a): final report	4
A Bayesian statistical method for large-scale MEMS-based sensors calibration: a case study on 100 digital accelerometers	4
Report on the key comparison, CCM.F-K23 in force at 200 N and 500 N	4
Key comparisons of air kerma and absorbed dose to water standards in 60Co radiation beam (EURAMET.RI(I)-K1.3 and EURAMET.RI(I)-K4.3)	4
Advancements in the NRC-FCs2 primary frequency standard	4
A constant pressure flowmeter for extreme-high vacuum	4
Practical realisation of the kelvin by Johnson noise thermometry	4
Experimental determination and Monte Carlo validation of 225 Ac absorbed dose	3
GPS PPP-AR frequency transfer and its application for comparing atomic fountain primary frequency standards between NRC and PTB	3
Comparison of laser power in multi-kilowatt range between three types of measurement systems based on light pressure or calorimetric principles	3
Comparison of methods to determine the fluence of monoenergetic neutrons in the energy range from 30 keV to 14.8 MeV	3
Force Key Comparison CCM.F-K2.a.2 - Final Report	3
International Comparison CCQM-K175 - Hydrogen chloride in nitrogen	3
Long-term stability of molecular doped epigraphene quantum Hall standards: single elements and large arrays (R K/236 ≈ 109 Ω)	3
APMP supplementary international comparison of activity measurement of Cs-134 and Cs-137 in brown rice	3
FINAL REPORT OF SIM SUPPLEMENTARY COMPARISON ON TESTING MACHINE CALIBRATION IN COMPRESSION UP TO 100 kN	3
Reply to Comment on ‘On the dimension of angles and their units’	3
Measurement of the intrinsic sensitivity for a single-ended accelerometer without the influence of the mounting condition	3
Final report on key comparison APMP.AUV.A-K5	3
Final report of CCQM-K157 for the measurement of the amount of substance of HfO2 expressed as the thickness of nm films	3
An assessment of the ageing of the absolute spectral responsivity of trap detectors at krypton ion laser emission wavelengths	3
Developing calibration and measurement capabilities for atmospheric CH4 stable isotope ratios at NMIs/DIs: metrology for global comparability	3
Comparison of standards for the calibration of stopwatches	3
Bilateral comparison of 1.018 V and 10 V standards between INRIM (Italy) and the BIPM, November to December 2023 (part of the ongoing BIPM key comparison BIPM.EM-K11.a and b)	3
Calibration of an ionisation chamber for parent–progeny decay	3
Final report of CCQM-P204, comparison on CO2 isotope ratios in pure CO2	3
Properties of a definition of the SI second based on several optical transitions	3
Method to traceably determine the refractive index by measuring the angle of minimum deviation	3
A metrological framework for uncertainty evaluation in machine learning classification models	3
Speedy in-situ magnetic field compensation algorithm for multiple-channel single-beam SERF atomic magnetometers	3
Subsequent bilateral key comparison study - organic solvent calibration solution - gravimetric preparation and value assignment of aflatoxin B1 (AfB1) in acetonitrile (ACN)	3
APMP.QM-S19: Toxic elements in seafood	3
Bilateral supplementary comparison of high voltage transformer measuring systems	3
CCQM-K176 breast cancer biomarker HER2 copy number variation (CNV) measurement	3
AFRIMETS supplementary comparison on pin gauges	3
Comparison of primary standards for liquid flow - flow range (0.1 to 10) µL/min	3
What is measurement uncertainty? A discussion *	3
Measurement of average mass attenuation coefficient of air for 137Cs gamma-ray irradiation beam	3
Comment on ‘On the dimension of angles and their units’	3
New impedance bridge at LNE for the two terminal-pair AC resistor calibration up to 20 kHz	3
Strontium 1 S 0 → 1 P	3

Phase-stepping interferometry for parallelism measurement of step gauge faces	3
Phase transition behavior of pure Fe cells for thermocouple calibration	3
Realisation of the kilogram with the XRCD method – improved XRF evaluation and its impact	3
Characterization of laser-pumped Cs-4He atomic magnetometer	3
AFRIMETS supplementary comparison on calibration of dial gauge	3
Activity measurements of the radionuclides 18F, 64Cu and 99mTc for the ANSTO, Australia, in the ongoing comparisons BIPM.RI(II)-K4 series and KCRV update in the corre	3
Final report, ongoing key comparison BIPM.QM-K1, ozone at ambient level, comparison with CMS/ITRI, March 2024	3
Extension to the range of prefixes for binary multiples	3