CCQM-K68.2019
MEASURAND Amount-of-substance fraction of Nitrous oxide in air
NOMINAL VALUES RANGE 320 nmol/mol to 350 nmol/mol
Degrees of equivalence represented by Di and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in nmol/mol.
CCQM-K68.2019
MEASURAND Amount-of-substance fraction of Nitrous oxide in air
NOMINAL VALUES RANGE 320 nmol/mol to 350 nmol/mol
Degrees of equivalence represented by Di and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in nmol/mol.
| LABi | Di | Uneg,i | Upos,i | |
|---|---|---|---|---|
nmol/mol |
nmol/mol |
nmol/mol |
||
| MIKES-FMI D232760 | -0.60 | 5.05 | ||
| MIKES-FMI D232761 | -0.59 | 4.95 | ||
| KRISS D641445 | -0.26 | 0.75 | ||
| KRISS D641669 | -0.57 | 0.85 | ||
| NIM FB03830 | -0.13 | 0.57 | ||
| NIM FB03840 | 0.05 | 0.64 | ||
| NIST FF22145 | 0.43 | 0.72 | ||
| NIST FF22146 | 0.48 | 0.73 | ||
| NMISA D679627 | -0.22 | 0.56 | ||
| NMISA D732200 | -0.11 | 0.37 | ||
| NOAA/ESRL FF57617 | 0.11 | 0.74 | ||
| NOAA/ESRL FF57625 | -0.13 | 0.67 | ||
| NPL 2731 | 0.50 | 1.18 | ||
| NPL 2864 | 0.50 | 1.12 | ||
| VNIIM D648613 | -0.20 | 3.21 | ||
| VNIIM D648616 | -0.30 | 3.01 | ||
| VSL D791188 | 0.30 | 1.56 | ||
| VSL D791189 | 0.40 | 1.52 |
| Metrology area, Sub-field | Chemistry and Biology, Gases |
| Description | Nitrous oxide in air at ambient levels |
| Time of measurements | 2019 - 2020 |
| Status | Approved for equivalence |
| Final Reports of the comparisons | |
| References | |
| Measurand | Mole fraction of nitrous oxide in air expressed in mol/ mol Nominal values range from 325 nmol/mol to 350 nmol/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 | J. Viallon +33 (0) 1 47 07 62 70 |
| Pilot laboratory | |
|---|---|
| BIPM |
Bureau International des Poids et Mesures, BIPM - International Organization, N/A |
| KRISS |
Korea Research Institute of Standards and Science, Korea, Republic of, APMP |
| MIKES-FMI |
Finnish Meteorological Institute, Finland, EURAMET |
| NIM |
National Institute of Metrology, China, APMP |
| NIST |
National Institute of Standards and Technology, United States, SIM |
| NMISA |
National Metrology Institute of South Africa, South Africa, AFRIMETS |
| NOAA/ESRL |
NOAA Earth System Research Laboratory (NOAA/ESRL), WMO - International Organization, SIM |
| NPL |
National Physical Laboratory, United Kingdom, EURAMET |
| VNIIM |
D.I. Mendeleyev Institute for Metrology, Rosstandart, Russian Federation, COOMET |
| VSL |
VSL, Netherlands, EURAMET |
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CCQM-K68.2019
MEASURAND Amount-of-substance fraction of Nitrous oxide in air
NOMINAL VALUES RANGE 320 nmol/mol to 350 nmol/mol
Key comparison reference value: there is no single reference value for this comparison, the value xiref is taken as the reference value for laboratory i.
The degree of equivalence of each laboratory i with respect to the reference value is given by a pair of terms, both expressed in nmol/mol: Di = (xLabi - xi ref) and its associated expanded uncertainty (k = 2) Ui. The computation of Ui is explained in section 11 of the CCQM-K68.2019 Final Report.
CCQM-K68.2019
MEASURAND Amount-of-substance fraction of Nitrous oxide in air
NOMINAL RANGE 320 nmol/mol to 350 nmol/mol
xLabi assigned value reported by laboratory i, Labi
uLabi combined standard uncertainty of xLabi
xi ref reference value for the cylinder for laboratory i (see section 11 of the CCQM-K68.2019 Final Report)
ui ref combined standard uncertainty of xi ref
| Labi | Cylinder | xi | ui | xi ref | ui ref | |
| number | nmol/mol | nmol/mol | nmol/mol | nmol/mol | ||
| MIKES-FMI | D232760 | 327.60 | 2.52 | 328.20 | 0.19 | |
| MIKES-FMI | D232761 | 320.41 | 2.46 | 321.00 | 0.29 | |
| KRISS | D641445 | 328.54 | 0.33 | 328.80 | 0.18 | |
| KRISS | D641669 | 338.93 | 0.34 | 339.50 | 0.12 | |
| NIM | FB03830 | 339.07 | 0.26 | 339.20 | 0.12 | |
| NIM | FB03840 | 346.55 | 0.26 | 346.50 | 0.19 | |
| NIST | FF22145 | 331.13 | 0.07 | 330.70 | 0.16 | |
| NIST | FF22146 | 344.38 | 0.07 | 343.90 | 0.16 | |
| NMISA | D679627 | 342.38 | 0.24 | 342.60 | 0.14 | |
| NMISA | D732200 | 331.49 | 0.11 | 331.60 | 0.15 | |
| NOAA/ESRL | FF57617 | 326.81 | 0.31 | 326.70 | 0.21 | |
| NOAA/ESRL | FF57625 | 342.87 | 0.30 | 343.00 | 0.15 | |
| NPL | 2731 | 326.50 | 0.55 | 326.00 | 0.22 | |
| NPL | 2864 | 337.70 | 0.55 | 337.20 | 0.11 | |
| VNIIM | D648613 | 332.40 | 1.60 | 332.60 | 0.14 | |
| VNIIM | D648616 | 342.50 | 1.50 | 342.80 | 0.14 | |
| VSL | D791188 | 348.20 | 0.75 | 347.90 | 0.21 | |
| VSL | D791189 | 337.80 | 0.75 | 337.40 | 0.11 |
