Comparison Display

BIPM.QM-K1

MEASURAND Ozone mole fraction in dry air

NOMINAL VALUE 80 nmol/mol

Degrees of equivalence represented by D_i = (x_I - x_R)/x_R and its expanded uncertainty U_i (k = 2) at a 95 % level of confidence, both expressed in nmol/mol.

80 nmol/mol

D_i

Participating institutes

Two results are given for NIST, ISCIII, VNIIM and KRISS as expected from BIPM.QM-K1 Protocol B

For each laboratory, only the most recent value is retained.

print out

BIPM.QM-K1

MEASURAND Ozone mole fraction in dry air

NOMINAL VALUE 420 nmol/mol

Degrees of equivalence represented by D_i = (x_I - x_R)/x_R and its expanded uncertainty U_i (k = 2) at a 95 % level of confidence, both expressed in nmol/mol.

420 nmol/mol

D_i

Participating institutes

Two results are given for NIST, ISCIII, VNIIM and KRISS as expected from BIPM.QM-K1 Protocol B

For each laboratory, only the most recent value is retained.

print out

BIPM.QM-K1

MEASURAND Ozone mole fraction in dry air

NOMINAL VALUE 80 nmol/mol

Degrees of equivalence represented by D_i = (x_I - x_R)/x_R and its expanded uncertainty U_i (k = 2) at a 95 % level of confidence, both expressed in nmol/mol.

LAB_i	D_i	U_neg,i	U_pos,i
	nmol/mol	nmol/mol	nmol/mol
VNIIM (1) (Jun-14)	0.08	0.85
VNIIM (2) (Jun-14)	0.04	0.85
NMISA (Jun-17)	-0.02	1.17
INECC (Sep-17)	-0.13	1.09
NPLI (Dec-17)	0.12	1.03
NILU (Jan-18)	0.05	1.06
NMC, A*STAR (Jul-18)	0.18	1.19
JRC (Jul-19)	-0.20	1.14
METAS (Jul-20)	-0.19	1.00
CHMI (Sep-21)	-0.14	1.01
INRIM (Feb-22)	-0.19	1.17
NPL (Jun-22)	-0.15	1.20
DMDM (Sep-22)	0.04	1.01
NIST (1) (Jul-22)	0.21	1.18
NIST (2) (Jul-22)	0.18	1.18
DHMZ-SOUL (Jul-22)	0.26	1.19
NIMT (Sep-22)	0.21	1.17
LNE (Mar-23)	-0.08	1.06
FMI (Mar-23)	0.21	1.06
ISCIII (1) (May-23)	0.53	1.72
ISCIII (2) (May-23)	0.15	1.71
EMPA (Jun-23)	-0.01	1.08
UBA (Jul-23)	0.03	1.13
EAA (Aug-23)	-0.08	1.20
NIM (Oct-23)	-0.22	1.19
UNAL-CALAIRE (Nov-23)	0.05	1.18
CMS (Mar-24)	-0.03	1.21
VSL (Apr-24)	-0.20	1.10
KRISS (1) (Sep-24)	0.01	1.11
KRISS (2) (Sep-24)	-0.47	1.11

Participating institutes

BIPM.QM-K1

Two results are given for NIST, ISCIII, VNIIM and KRISS as expected from BIPM.QM-K1 Protocol B

For each laboratory, only the most recent value is retained.

print out

BIPM.QM-K1

MEASURAND Ozone mole fraction in dry air

NOMINAL VALUE 420 nmol/mol

Degrees of equivalence represented by D_i = (x_I - x_R)/x_R and its expanded uncertainty U_i (k = 2) at a 95 % level of confidence, both expressed in nmol/mol.

LAB_i	D_i	U_neg,i	U_pos,i
	nmol/mol	nmol/mol	nmol/mol
VNIIM (1) (Jun-14)	0.33	3.57
VNIIM (2) (Jun-14)	0.58	3.56
NMISA (Jun-17)	0.58	4.40
INECC (Sep-17)	0.40	3.85
NPLI (Dec-17)	0.04	3.53
NILU (Jan-18)	-0.13	3.58
NMC, A*STAR (Jul-18)	0.82	4.47
KRISS (Apr-19)	0.34	3.47
JRC (Jul-19)	-0.87	4.20
METAS (Jul-20)	0.32	2.93
CHMI (Sep-21)	0.61	3.48
INRIM (Feb-22)	-0.52	3.83
NPL (Jun-22)	0.49	3.63
DMDM (Sep-22)	0.47	3.54
NIST (1) (Jul-22)	0.77	4.46
NIST (2) (Jul-22)	0.97	4.46
DHMZ-SOUL (Jul-22)	2.07	4.47
NIMT (Sep-22)	0.33	4.47
LNE (Mar-23)	0.48	3.68
FMI (Mar-23)	0.27	3.70
ISCIII (1) (May-23)	1.88	4.05
ISCIII (2) (May-23)	0.45	4.08
EMPA (Jun-23)	0.67	3.62
UBA (Jul-23)	-0.03	4.45
EAA (Aug-23)	0.61	4.49
NIM (Oct-23)	-0.95	4.45
UNAL-CALAIRE (Nov-23)	0.82	4.44
CMS (Mar-24)	0.69	4.52
VSL (Apr-24)	0.15	3.34
KRISS (1) (Sep-24)	-0.92	4.51
KRISS (2) (Sep-24)	-0.43	4.48

Participating institutes

BIPM.QM-K1

Two results are given for NIST, ISCIII, VNIIM and KRISS as expected from BIPM.QM-K1 Protocol B

For each laboratory, only the most recent value is retained.

Comparison

Comparison close

BIPM.QM-K1

print out

Information & contact
Participants

Metrology area, Sub-field	Chemistry and Biology, Gases
Description	Ozone at ambient level
Time of measurements	2007 -
Status	Continuous, approved for equivalence

References	Protocol for the comparison BIPM.QM-K1
Measurand	Amount fraction of ozone in dry air 80 nmol/mol and 420 nmol/mol
Transfer device	Measurements made at the BIPM by comparison with the BIPM Reference Photometer SRP27

Comparison type	Key Comparison
Consultative Committee	CCQM (Consultative Committee for Amount of Substance)
Conducted by	BIPM (Bureau International des Poids et Mesures)
Comments	First results published on 09 April 2008 The Final Report for each bi-lateral comparsion is listed in the tab "Participants" Most recent update: 13 March 2025
Pilot institute	BIPM Bureau International des Poids et Mesures BIPM - International Organization
Contact person	J. Viallon +33 (0) 1 47 07 62 70

Pilot laboratory
BIPM	Bureau International des Poids et Mesures, BIPM - International Organization, N/A

CHMU/CHMI	Czech Hydrometeorological Institute, Czechia, EURAMET
Sep 2007	Metrologia, 2008, 45, Tech. Suppl., 08005
Sep 2009	Metrologia, 2011, 48, Tech. Suppl., 08001
Sep 2013	Metrologia, 2013, 50, Tech. Suppl., 08024
Sep 2017	Metrologia, 2018, 55, Tech. Suppl., 08015
Sep 2021	Metrologia 2022 59 Tech. Suppl. 08008

CMS	ITRI Center for Measurement Standards, Chinese Taipei, APMP
Jun 2016	Metrologia, 2017, 54, Tech. Suppl., 08031
Mar 2024	Metrologia 2024 61 Tech. Suppl. 08013

DHMZ-SOUL	Meteorological and Hydrological Service/Calibration Laboratory, Croatia, EURAMET
Aug 2016	Metrologia, 2018, 55, Tech. Suppl., 08023
Jul 2022	Metrologia 2023 60 Tech. Supp. 08017

DMDM	Directorate of Measures and Precious Metals, Serbia, EURAMET
Jul 2015	Metrologia, 2015, 53, Tech. Suppl., 08006
Sep 2022	Metrologia 2023 60 Tech. Suppl. 08003

EAA	Umweltbundesamt GmbH, Environmental Agency of Austria, Austria, EURAMET
Sep 2011	Metrologia, 2011, 48, Tech. Suppl., 08018
Sep 2019	Metrologia 2020 57 Tech. Suppl. 08009
Aug 2023	Metrologia 2025 62 Tech. Suppl. 08017

EMPA (WMO)	Swiss Federal Laboratories for Materials Testing and Research, WMO - International Organization, SIM
Jun 2012	Metrologia, 2012, 49, Tech. Suppl., 08011
Jun 2023	Metrologia 2024 61 Tech. Supp. 08006

INECC	Instituto Nacional de Ecología y Cambio Climático, Mexico, SIM
Oct 2010	Metrologia, 2011, 48, Tech. Suppl., 08003
Sep 2017	Metrologia 2020 55 Tech. Suppl. 08010

INRIM	Istituto Nazionale di Ricerca Metrologica, Italy, EURAMET
Sep 2007	Metrologia, 2009, 46, Tech. Suppl., 08012
Feb. 2022	Metrologia 2022 59 Tech. Suppl. 08012

ISCIII	Instituto de Salud Carlos III, Spain, EURAMET
Jun 2007	Metrologia, 2009, 46, Tech. Suppl., 08015
Dec 2010	Metrologia, 2011, 48, Tech. Suppl., 08005
Dec 2012	Metrologia, 2013, 50, Tech. Suppl., 08008
Dec 2014	Metrologia, 2015, 52, Tech. Suppl., 08014
Mar 2017	Metrologia, 2017, 54, Tech. Suppl., 08024
Mar 2019	Metrologia 2020 57 Tech. Suppl. 08003
Feb 2021	Metrologia 2021 58 Tech. Suppl. 08021
May 2023	Metrologia 2023 60 Tech. Supp. 08025

JRC	Joint Research Centre, European Union, EURAMET
Dec 2008	Metrologia, 2009, 46, Tech. Suppl., 08017
Oct 2013	Metrologia, 2014, 51, Tech. Suppl., 08006
Jul 2019	Metrologia 2020 57 Tech. Suppl. 08006

KRISS	Korea Research Institute of Standards and Science, Korea, Republic of, APMP
Sep 2007	Metrologia, 2009, 46, Tech. Suppl., 08010
Mar 2012	Metrologia, 2012, 49, Tech. Suppl., 08007
Apr 2019	Metrologia 2020 57 Tech. Suppl. 08002
Sep 2024	Metrologia 2025 62 Tech. Suppl. 08008

LNE	Laboratoire national de métrologie et d'essais, France, EURAMET
Apr 2008	Metrologia, 2009, 46, Tech. Suppl., 08013
May 2012	Metrologia, 2012, 49, Tech. Suppl., 08012
Mar 2023	Metrologia 2023 60 Tech. Supp. 08018

METAS	Federal Institute of Metrology, Switzerland, EURAMET
Jul 2008	Metrologia, 2009, 46, Tech. Suppl., 08016
Jul 2013	Metrologia, 2013, 50, Tech. Suppl., 08022
Jul 2020	Metrologia 2021 58 Tech. Suppl. 08012

MIKES-FMI	Finnish Meteorological Institute, Finland, EURAMET
Feb 2012	Metrologia, 2012, 49, Tech. Suppl., 08013
Nov 2017	Metrologia, 2018, 55, Tech. Suppl., 08022
Mar 2023	Metrologia 2024 61 Tech. Supp. 08003

NILU	Norwegian Institute for Air Research, Norway, EURAMET
Jan 2018	Metrologia 2020 57 Tech. Suppl. 08010

NIM	National Institute of Metrology, China, APMP
Mar 2008	Metrologia, 2009, 46, Tech. Suppl., 08018
Jul 2014	Metrologia, 2015, 52, Tech. Suppl., 08012
Oct 2023	Metrologia 2024 61 Tech. Supp. 08005

NIMT	National Institute of Metrology (Thailand), Thailand, APMP
Sep 2022	Metrologia 2023 60 Tech. Supp. 08024

NIST	National Institute of Standards and Technology, United States, SIM
Jan 2007	Metrologia, 2008, 45, Tech. Suppl., 08008
Jun 2009	Metrologia, 2011, 48, Tech. Suppl., 08006
Feb 2013	Metrologia, 2014, 51, Tech. Suppl., 08005
Jul 2015	Metrologia, 2017, 54, Tech. Suppl., 08006
Sep 2017	Metrologia, 2018, 55, Tech. Suppl., 08021
Jun 2019	Metrologia 2020 57 Tech. Suppl. 08005
Jul 2022	Metrologia 2023 60 Tech. Suppl. 08009

NMC, A*STAR	National Metrology Centre, Agency for Science, Technology and Research, Singapore, APMP
Dec 2010	Metrologia, 2011, 48, Tech. Suppl., 08017
May 2013	Metrologia, 2014, 51, Tech. Suppl., 08007
Jul 2018	Metrologia 2020 57 Tech. Suppl. 08008
Jul 2022	Metrologia 2024 61 Tech. Suppl. 08008

NMISA	National Metrology Institute of South Africa, South Africa, AFRIMETS
Jul 2008	Metrologia, 2010, 47, Tech. Suppl., 08014
Aug 2010	Metrologia, 2011, 48, Tech. Suppl., 08007
Jul 2012	Metrologia, 2013, 50, Tech. Suppl., 08014
Jun 2017	Metrologia, 2018, 55, Tech. Suppl., 08001

NPL	National Physical Laboratory, United Kingdom, EURAMET
May 2008	Metrologia, 2009, 46, Tech. Suppl., 08011
May 2013	Metrologia, 2014, 51, Tech. Suppl., 08004
Apr 2017	Metrologia, 2018, 55, Tech. Suppl., 08009 - Final Report
Jun 2022	Metrologia 2024 61 Tech. Supp. 08007

NPLI	CSIR National Physical Laboratory of India, India, APMP
Feb 2009	Metrologia, 2010, 47, Tech. Suppl., 08015
Feb 2018	Metrologia, 2018, 55, Tech. Suppl., 08014

SE "Ukrmetrteststandard"

State Enterprise "Ukrmetrteststandard", Ukraine, EURAMET

UBA	Umweltbundesamt, Federal Environment Agency, Germany, EURAMET
Nov 2007	Metrologia, 2009, 46, Tech. Suppl., 08014
Mar 2012	Metrologia, 2012, 49, Tech. Suppl., 08008
Oct 2019	Metrologia 2020 57 Tech. Suppl. 08007
Jul 2023	Metrologia 2025 62 Tech. Suppl. 08011

UNAL-CALAIRE	Universidad Nacional de Colombia – Laboratorio de Calidad del Aire - CALAIRE, Colombia, SIM
November 2023	Metrologia 2025 62 Tech. Suppl. 08021

VNIIM	D.I. Mendeleyev Institute for Metrology, Rosstandart, Russian Federation, COOMET
Nov 2007	Metrologia, 2008, 45, Tech. Suppl., 08009
Jun 2014	Metrologia, 2015, 52, Tech. Suppl., 08010a

VSL	VSL, Netherlands, EURAMET
Sep 2008	Metrologia, 2010, 47, Tech. Suppl., 08024
Dec 2010	Metrologia, 2011, 48, Tech. Suppl., 08008
Sep 2016	Metrologia 2017 54 Tech. Suppl. 08025
Apr 2024	Metrologia 2024 61 Tech. Suppl. 08012

print out

BIPM.QM-K1

MEASURAND Ozone mole fraction in dry air

NOMINAL VALUE 80 nmol/mol

The key comparison reference value is the measurement result obtained with the BIPM Photometer SRP27.

The degree of equivalence of laboratory i with respect to the key comparison reference value x_SRP27 is given by a pair of terms:
D_i= x_i - x_SRP27 and its expanded uncertainty (k = 2), U_i = 2(u_i²+ u_SRP27²)^1/2, both expressed in nmol/mol.

print out

BIPM.QM-K1

MEASURAND Ozone mole fraction in dry air

NOMINAL VALUE 420 nmol/mol

The key comparison reference value is the measurement result obtained with the BIPM Photometer SRP27.

print out

BIPM.QM-K1

MEASURAND Ozone mole fraction in dry air

NOMINAL VALUE 80 nmol/mol

x_imeasurement result obtained with laboratory i Photometer
u_i combined standard uncertainty of x_i
x_SRP27 measurement result obtained with the BIPM Photometer SRP27
u_SRP27 combined standard uncertainty of x_SRP27

Lab_i	x_i	u_i	x_SRP27	u_SRP27	date of
	nmol/mol	nmol/mol	nmol/mol	nmol/mol	measurement
VNIIM (1)	78.63	0.31	78.55	0.29	Jun-14
VNIIM (2)	78.22	0.31	78.17	0.29	Jun-14
CMS	86.33	0.38	86.36	0.48	Jun-16
VSL	78.25	0.40	78.16	0.36	Sep-16
NMISA	78.09	0.36	78.11	0.46	Jun-17
INECC	78.67	0.41	78.80	0.36	Sep-17
NPLI	80.23	0.37	80.10	0.36	Dec-17
NILU	80.20	0.38	80.15	0.36	Jan-18
NMC, A*STAR	81.16	0.37	80.98	0.47	Jul-18
JRC	79.51	0.44	79.71	0.36	Jun-19
METAS	76.44	0.35	76.63	0.36	Jul-20
CHMI	76.16	0.36	76.30	0.36	Sep-21
INRIM	85.19	0.45	85.38	0.37	Feb-22
NPL	83.20	0.47	83.35	0.37	Jun-22
DMDM	82.79	0.34	82.75	0.37	Sep-22
NIST (1)	80.63	0.37	80.42	0.47	Jul-22
NIST (2)	80.21	0.37	80.03	0.46	Jul-22
DHMZ-SOUL	80.10	0.37	81.84	0.47	Jul-22
NIMT	78.55	0.36	78.33	0.46	Sep-22
LNE	84.02	0.38	84.10	0.37	Mar-23
FMI	85.91	0.38	85.71	0.38	Mar-23
ISCIII (1)	81.37	0.37	80.84	0.78	May-23
ISCIII (2)	80.77	0.37	80.62	0.78	May-23
EMPA	83.25	0.39	83.29	0.37	Jun-23
UBA	72.17	0.35	72.15	0.44	Jul-23
EAA	81.70	0.37	81.78	0.47	Aug-23
NIM	80.54	0.37	80.76	0.47	Oct-23
UNAL-CALAIRE	80.38	0.37	80.33	0.47	Nov-23
CMS	84.38	0.37	84.42	0.48	Mar-24
VSL	83.00	0.41	83.19	0.37	Apr-24
KRISS (1)	81.00	0.34	80.99	0.44	Sep-24
KRISS (2)	80.16	0.34	80.63	0.44	Sep-24

Two results are given for NIST, ISCIII, VNIIM and KRISS as expected from BIPM.QM-K1 Protocol B.

For each laboratory, only the most recent value is retained.

print out

BIPM.QM-K1

MEASURAND Ozone mole fraction in dry air

NOMINAL VALUE 420 nmol/mol

Lab_i	x_i	u_i	x_SRP27	u_SRP27	date of
	nmol/mol	nmol/mol	nmol/mol	nmol/mol	measurement
VNIIM (1)	420.33	1.25	420.00	1.28	Jun-14
VNIIM (2)	419.04	1.25	418.46	1.27	Jun-14
CMS	419.59	1.26	419.40	1.83	Jun-16
VSL	408.63	1.07	408.55	1.23	Sep-16
NMISA	415.95	1.25	415.37	1.81	Jun-17
INECC	415.55	1.47	415.14	1.24	Sep-17
NPLI	415.92	1.25	415.88	1.25	Dec-17
NILU	415.72	1.29	415.85	1.25	Jan-18
NMC, A*STAR	422.46	1.27	421.64	1.84	Jul-18
JRC	419.69	1.68	420.56	1.26	Jun-19
METAS	407.58	0.81	407.25	1.22	Jul-20
CHMI	410.08	1.23	409.46	1.23	Sep-21
INRIM	429.54	1.42	430.06	1.29	Feb-22
NPL	420.27	1.31	419.78	1.26	Jun-22
DMDM	418.76	1.25	418.28	1.25	Sep-22
NIST (1)	422.46	1.26	421.69	1.84	Jul-22
NIST (2)	421.85	1.26	420.88	1.83	Jul-22
DHMZ-SOUL	424.80	1.27	422.73	1.84	Jul-22
NIMT	422.38	1.26	422.05	1.84	Sep-22
LNE	429.00	1.32	428.52	1.28	Mar-23
FMI	436.84	1.31	436.58	1.31	Mar-23
ISCIII (1)	421.30	1.26	419.42	1.59	May-23
ISCIII (2)	423.13	1.27	422.68	1.60	May-23
EMPA	426.45	1.29	425.78	1.27	Jun-23
UBA	420.80	1.26	420.83	1.83	Jul-23
EAA	424.50	1.27	423.89	1.85	Aug-23
NIM	419.40	1.26	420.35	1.83	Oct-23
UNAL-CALAIRE	420.13	1.26	419.31	1.83	Nov-23
CMS	427.66	1.28	426.97	1.86	Mar 24
VSL	420.04	1.10	419.89	1.26	Apr-24
KRISS (1)	427.91	1.27	428.83	1.86	Sep-24
KRISS (2)	425.13	1.26	425.56	1.85	Sep-24

Two results are given for NIST, ISCIII, VNIIM and KRISS as expected from BIPM.QM-K1 Protocol B.

For each laboratory, only the most recent value is retained.

KCDB

CIPM MRA

CLASSIFICATION OF SERVICES

Key and supplementary comparisons - Print out