MEASURAND Amount fraction of Nitrogen dioxide in Nitrogen
NOMINAL VALUE 10 µmol mol^{-1}
Measurement 1
Degrees of equivalence represented by D_{i} and its expanded uncertainty U_{i} at a 95 % level of confidence, both expressed in µmol mol^{-1} .
MEASURAND Amount fraction of Nitrogen dioxide in Nitrogen
NOMINAL VALUE 10 µmol mol^{-1}
Measurement 2
Degrees of equivalence represented by D_{i} and its expanded uncertainty U_{i} at a 95 % level of confidence, both expressed in µmol mol^{-1} .
MEASURAND Amount fraction of Nitrogen dioxide in Nitrogen
NOMINAL VALUE 10 µmol mol^{-1}
Measurement 3
Degrees of equivalence represented by D_{i} and its expanded uncertainty U_{i} at a 95 % level of confidence, both expressed in µmol mol^{-1} .
MEASURAND Amount fraction of Nitrogen dioxide in Nitrogen
NOMINAL VALUE 10 µmol mol^{-1}
Measurement 1
Degrees of equivalence represented by D_{i} and its expanded uncertainty U_{i} at a 95 % level of confidence, both expressed in µmol mol^{-1} .
LAB_{i} | D_{i} | U_{neg,i} | U_{pos,i} | |
---|---|---|---|---|
µmol mol^{-1} |
µmol mol^{-1} |
µmol mol^{-1} |
||
CERI.1 | 0.091 | 0.214 | ||
CERI.2 | 0.058 | 0.221 | ||
GUM.1 | 0.169 | 0.404 | ||
GUM.2 | 0.141 | 0.503 | ||
INRIM.1 | 0.631 | 0.185 | ||
INRIM.2 | 0.643 | 0.151 | ||
KRISS.1 | 0.689 | 0.309 | ||
KRISS.2 | 0.780 | 0.309 | ||
LNE.1 | 0.202 | 0.333 | ||
LNE.2 | 0.199 | 0.284 | ||
METAS.1 | -0.120 | 0.346 | ||
METAS.2 | -0.145 | 0.357 | ||
NIM.1 | 0.023 | 0.133 | ||
NIM.2 | 0.050 | 0.116 | ||
NMIA.1 | 0.396 | 0.233 | ||
NMIA.2 | 0.541 | 0.372 | ||
NMISA.1 | 0.422 | 0.151 | ||
NMISA.2 | 0.402 | 0.147 | ||
SMU.1 | 0.388 | 0.233 | ||
SMU.2 | 0.748 | 0.347 | ||
UME.1 | 0.752 | 0.161 | ||
UME.2 | 0.843 | 0.175 | ||
VNIIM.1 | 0.500 | 0.248 | ||
VNIIM.2 | 0.255 | 0.262 | ||
VSL.1 | 0.125 | 0.199 | ||
VSL.2 | 0.103 | 0.208 |
The degrees of equivalence for the two cylinders of NPL were not computed due unstable mixtures.
MEASURAND Amount fraction of Nitrogen dioxide in Nitrogen
NOMINAL VALUE 10 µmol mol^{-1}
Measurement 2
Degrees of equivalence represented by D_{i} and its expanded uncertainty U_{i} at a 95 % level of confidence, both expressed in µmol mol^{-1} .
LAB_{i} | D_{i} | U_{neg,i} | U_{pos,i} | |
---|---|---|---|---|
µmol mol^{-1} |
µmol mol^{-1} |
µmol mol^{-1} |
||
CERI.1 | 0.069 | 0.173 | ||
CERI.2 | 0.070 | 0.171 | ||
GUM.1 | 0.090 | 0.357 | ||
GUM.2 | 0.029 | 0.405 | ||
INRIM.1 | 0.586 | 0.173 | ||
INRIM.2 | 0.637 | 0.151 | ||
KRISS.1 | 0.835 | 0.309 | ||
KRISS.2 | 0.917 | 0.310 | ||
LNE.1 | 0.164 | 0.265 | ||
LNE.2 | 0.221 | 0.230 | ||
METAS.1 | -0.210 | 0.281 | ||
METAS.2 | -0.238 | 0.282 | ||
NIM.1 | 0.021 | 0.111 | ||
NIM.2 | 0.036 | 0.102 | ||
NMIA.1 | 0.411 | 0.233 | ||
NMIA.2 | 0.555 | 0.335 | ||
NMISA.1 | 0.435 | 0.151 | ||
NMISA.2 | 0.407 | 0.147 | ||
NPL.1 | 0.171 | 0.163 | ||
NPL.2 | 0.247 | 0.176 | ||
SMU.1 | 0.423 | 0.233 | ||
SMU.2 | 0.763 | 0.311 | ||
UME.1 | 0.809 | 0.152 | ||
UME.2 | 0.885 | 0.160 | ||
VNIIM.1 | 0.348 | 0.228 | ||
VNIIM.2 | 0.291 | 0.233 | ||
VSL.1 | 0.117 | 0.191 | ||
VSL.2 | 0.076 | 0.195 |
MEASURAND Amount fraction of Nitrogen dioxide in Nitrogen
NOMINAL VALUE 10 µmol mol^{-1}
Measurement 3
Degrees of equivalence represented by D_{i} and its expanded uncertainty U_{i} at a 95 % level of confidence, both expressed in µmol mol^{-1} .
LAB_{i} | D_{i} | U_{neg,i} | U_{pos,i} | |
---|---|---|---|---|
µmol mol^{-1} |
µmol mol^{-1} |
µmol mol^{-1} |
||
CERI.1 | 0.082 | 0.156 | ||
CERI.2 | -0.020 | 0.153 | ||
GUM.1 | 0.114 | 0.336 | ||
GUM.2 | 0.001 | 0.365 | ||
INRIM.1 | 0.521 | 0.165 | ||
INRIM.2 | 0.674 | 0.151 | ||
KRISS.1 | 0.906 | 0.309 | ||
KRISS.2 | 0.992 | 0.309 | ||
LNE.1 | 0.105 | 0.224 | ||
LNE.2 | 0.267 | 0.205 | ||
METAS.1 | -0.195 | 0.259 | ||
METAS.2 | -0.231 | 0.257 | ||
NIM.1 | 0.020 | 0.104 | ||
NIM.2 | 0.059 | 0.096 | ||
NMIA.1 | 0.440 | 0.233 | ||
NMIA.2 | 0.608 | 0.321 | ||
NMISA.1 | 0.469 | 0.151 | ||
NMISA.2 | 0.461 | 0.147 | ||
NPL.1 | 0.210 | 0.148 | ||
NPL.2 | 0.288 | 0.161 | ||
SMU.1 | 0.439 | 0.233 | ||
SMU.2 | 0.819 | 0.298 | ||
UME.1 | 0.856 | 0.149 | ||
UME.2 | 0.971 | 0.152 | ||
VNIIM.1 | 0.378 | 0.219 | ||
VNIIM.2 | 0.316 | 0.221 | ||
VSL.1 | 0.122 | 0.188 | ||
VSL.2 | 0.119 | 0.19 |
Metrology area, Sub-field | Chemistry and Biology, Gases |
Description | Nitrogen dioxide (NO_{2}) in Nitrogen (N_{2}) |
Time of measurements | 2017 |
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 | |
Pilot institute |
BIPM
Bureau International des Poids et Mesures BIPM - International Organization |
Contact person | E. Flores +33 1 45 07 70 92 |
Pilot laboratory | |
---|---|
BIPM |
Bureau International des Poids et Mesures, BIPM - International Organization, N/A |
CERI |
Chemicals Evaluation and Research Institute, Japan, APMP |
GUM |
Glowny Urzad Miar, Central Office of Measures, Poland, EURAMET |
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 |
NIM |
National Institute of Metrology, China, APMP |
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 |
UME |
TÜBITAK Ulusal Metroloji Enstitüsü, Turkey, EURAMET |
VNIIM |
D.I. Mendeleyev Institute for Metrology, Rosstandart, Russian Federation, COOMET |
VSL |
VSL, Netherlands, EURAMET |
This page proposes print-out on A4 paper (portrait) of the comparison details (best printed out using a black and white printer).
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MEASURAND Amount fraction of Nitrogen dioxide in Nitrogen
NOMINAL VALUE 10 µmol mol^{-1}
Measurement 1
The key comparison reference value is the Nitrogen dioxide mole fraction assigned by the BIPM, x_{Ri}, to a cylinder of laboratory i , as explained in Section 6.1 on page 35 of the Final Report. Its associated standard uncertainty, u_{Ri}, is calculated as explained in Annex 3 on page 51 of the Final Report.
One degree of equivalence for one standard of one laboratory i participant at one date of the measurement performed by the coordinating laboratory is defined by two terms , both expressed in µmol/mol:
D_{i} = (x_{i} - x_{Ri}) where x_{i} denotes the estimation of the NO_{2} amount fraction in the participant's standard at the date of the key comparison reference value and x_{Ri} denotes the reference value given by the BIPM on that date.
Its associated expanded uncertainty is U_{i} = (u_{i}^{ 2} - u_{Ri }^{2})^{1/2} at a 95 % level of confidence where U_{i} = 2 u_{i}.
MEASURAND Amount fraction of Nitrogen dioxide in Nitrogen
NOMINAL VALUE 10 µmol mol^{-1}
Measurement 2
The key comparison reference value is the Nitrogen dioxide mole fraction assigned by the BIPM, x_{Ri}, to a cylinder of laboratory i , as explained in Section 6.1 on page 35 of the Final Report. Its associated standard uncertainty, u_{Ri} , is calculated as explained in Annex 3 on page 51 of the Final Report.
One degree of equivalence for one standard of one laboratory i participant at one date of the measurement performed by the coordinating laboratory is defined by two terms, bothe expressed in µmol/mol:
D_{i} = (x_{i} - x_{R i}) where x_{i} denotes the estimation of the NO_{2} amount fraction in the participant's standard at the date of the key comparison reference value and x_{Ri } denotes the reference value given by the BIPM on that date.
Its associated expanded uncertainty is U_{i} = (u_{i}^{ 2} - u_{Ri }^{2})^{1/2} at a 95 % level of confidence where U_{i} = 2 u_{i}.
MEASURAND Amount fraction of Nitrogen dioxide in Nitrogen
NOMINAL VALUE 10 µmol mol^{-1}
Measurement 3
The key comparison reference value is the Nitrogen dioxide mole fraction assigned by the BIPM, x_{Ri}, to a cylinder of laboratory i , as explained in Section 6.1 on page 35 of the Final Report. Its associated standard uncertainty, u_{Ri}, is calculated as explained in Annex 3 on page 51 of the Final Report.
One degree of equivalence for one standard of one laboratory i participant at one date of the measurement performed by the coordinating laboratory is defined by two terms , both expressed in µmol/mol:
D_{i} = (x_{i} - x_{Ri}) where x_{i} denotes the estimation of the NO_{2} amount fraction in the participant's standard at the date of the key comparison reference value and x_{Ri} denotes the reference value given by the BIPM on that date.
Its associated expanded uncertainty is U_{i} = (u_{i}^{ 2} - u_{Ri }^{2})^{1/2} at a 95 % level of confidence where U_{i} = 2 u_{i}.
MEASURAND Amount fraction of Nitrogen dioxide in Nitrogen
NOMINAL VALUE 10 µmol mol^{-1}
Measurement 1
x_{i} estimated value of the NO_{2} amount fraction in the participant’s standard at the date of the evaluation of the key comparison value as explained in section 6.2 of the Final Report.
u_{i} uncertainty of x_{i }
The values for the laboratory individual measurements can be found in the Table 9 of the Annex I of the Final Report.
Note: A model to calculate the participants’ NO_{2} amount fraction in their standards was applied at the date of the evaluation of the he key comparison values (BIPM measurements). A difference was made between cylinders with a NO_{2} amount fraction decay and without, as observed when applying a linear model to participants’ results. Table 6 (see Final Report) list the parameters (slope and intercept) of a linear regression performed on the NO_{2} amount fractions submitted by participants. Calculated decay rates faster than -10^{-4} μmol mol^{-1}/day were taken to indicate a cylinder in which NO_{2} was decreasing.
MEASURAND Amount fraction of Nitrogen dioxide in Nitrogen
NOMINAL VALUE 10 µmol mol^{-1}
Measurement 2
x_{i} estimated value of the NO_{2} amount fraction in the participant’s standard at the date of the evaluation of the key comparison value as explained in section 6.2 of the Final Report.
u_{i} uncertainty of x_{i }
The values for the laboratory individual measurements can be found in the Table 9 of the Annex I of the Final Report.
Note: A model to calculate the participants’ NO_{2} amount fraction in their standards was applied at the date of the evaluation of the he key comparison values (BIPM measurements). A difference was made between cylinders with a NO_{2} amount fraction decay and without, as observed when applying a linear model to participants’ results. Table 6 (see Final Report) list the parameters (slope and intercept) of a linear regression performed on the NO_{2} amount fractions submitted by participants. Calculated decay rates faster than -10^{-4} μmol mol^{-1}/day were taken to indicate a cylinder in which NO_{2} was decreasing.
MEASURAND Amount fraction of Nitrogen dioxide in Nitrogen
NOMINAL VALUE 10 µmol mol^{-1}
Measurement 3
x_{i} estimated value of the NO_{2} amount fraction in the participant’s standard at the date of the evaluation of the key comparison value as explained in section 6.2 of the Final Report.
u_{i} uncertainty of x_{i }
The values for the laboratory individual measurements can be found in the Table 9 of the Annex I of the Final Report.
Note: A model to calculate the participants’ NO_{2} amount fraction in their standards was applied at the date of the evaluation of the he key comparison values (BIPM measurements). A difference was made between cylinders with a NO_{2} amount fraction decay and without, as observed when applying a linear model to participants’ results. Table 6 (see Final Report) list the parameters (slope and intercept) of a linear regression performed on the NO_{2} amount fractions submitted by participants. Calculated decay rates faster than -10^{-4} μmol mol^{-1}/day were taken to indicate a cylinder in which NO_{2} was decreasing.