Comparison
Comparison close

MEASURAND : Amount-of-substance fraction of Nitrogen dioxide in Nitrogen
NOMINAL VALUE : 10 µmol/mol

Degrees of equivalence : offset Di and expanded uncertainty (k = 2) Ui expressed in µmol/mol

Comparison
Comparison close

MEASURAND : Amount-of-substance fraction of Nitrogen dioxide in Nitrogen
NOMINAL VALUE : 10 µmol/mol

Degrees of equivalence : offset Di and expanded uncertainty (k = 2) Ui
expressed in µmol/mol

Results are presented under A4 printable format in Summary Results (PDF file).

Comparison
Comparison close
CC comparison
Linked comparison
CCQM-K74
Metrology area, Sub-field Chemistry and Biology, Gases
Description Nitrogen dioxide (NO2) in Nitrogen (N2)
Time of measurements 2009 - 2010
Status Approved for equivalence
Final Reports of the comparisons
Measurand Amount-of-substance fraction: 10 µmol/mol
Transfer device Gas cylinders
Comparison type Key Comparison
Consultative Committee CCQM (Consultative Committee for Amount of Substance)
Conducted by CCQM (Consultative Committee for Amount of Substance)
Comments

Results published on 27 January 2012

Nitrogen dioxide in Nitrogen

Pilot institute BIPM
Bureau International des Poids et Mesures
BIPM - International Organization
Contact person E. Flores
edgar.flores@bipm.org
+33 1 45 07 70 92
First Name Last Name
wwww@ww.www +356719836 Institute 1 Institute 1 Khmelnitskiy
Pilot laboratory
BIPM

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

BAM

Bundesanstalt für Materialforschung und -prüfung, Germany, EURAMET

CEM

Centro Español de Metrologia, Spain, EURAMET

CERI

Chemicals Evaluation and Research Institute, Japan, APMP

INRIM

Istituto Nazionale di Ricerca Metrologica, Italy, EURAMET

KRISS

Korea Research Institute of Standards and Science, Korea, Republic of, APMP

LNE

Laboratoire national de métrologie et d'essais, France, EURAMET

METAS

Federal Institute of Metrology, Switzerland, EURAMET

MIKES-FMI

Finnish Meteorological Institute, Finland, EURAMET

NIM

National Institute of Metrology, China, APMP

NIST

National Institute of Standards and Technology, United States, SIM

NMIA

National Measurement Institute, Australia, Australia, APMP

NMISA

National Metrology Institute of South Africa, South Africa, AFRIMETS

NPL

National Physical Laboratory, United Kingdom, EURAMET

SMU

Slovensky Metrologicky Ustav, Slovakia, EURAMET

VNIIM

D.I. Mendeleyev Institute for Metrology, Rosstandart, Russian Federation, COOMET

VSL

VSL, Netherlands, EURAMET

Comparison
Comparison close

MEASURAND : Amount-of-substance fraction of Nitrogen dioxide in Nitrogen
NOMINAL VALUE : 10 µmol/mol

The key comparison reference value is the Nitrogen dioxide mole fraction assigned by the BIPM, xRi, to the cylinder measured by laboratory i, as explained in Section 5 on page 20 of the Final Report and in its Annex 2 on page 38.
Its standard uncertainty, uRi, is calculated using Equation (1) given on page 20 of the Final Report, with applying appropriate covariance factors as detailed in Annex 1.

The degree of equivalence of laboratory i with respect to the key comparison reference value is given by a pair of terms: Di = (xi - xRi) and Ui, its expanded uncertainty (k = 2), both expressed in µmol/mol, with Ui = 2(ui2 + uRi2]1/2.

No pair-wise degrees of equivalence are computed for this comparison.
Comparison
Comparison close

MEASURAND : Amount-of-substance fraction of Nitrogen dioxide in Nitrogen
NOMINAL VALUE : 10 µmol/mol

xi : result of measurement carried out by laboratory i
ui : standard uncertainty of xi