CCQM-K90
MEASURAND : Formaldehyde (HCHO) in nitrogen
Degrees of equivalence Di and expanded uncertainty Ui (k = 2)
CCQM-K90
MEASURAND : Formaldehyde (HCHO) in nitrogen
Degrees of equivalence Di and expanded uncertainty Ui (k = 2)
Results are presented under A4 printable format in Summary Results (PDF file).
| Metrology area, Sub-field | Chemistry and Biology, Gases |
| Description | Formaldehyde in Nitrogen |
| Time of measurements | 2015 - 2016 |
| Status | Approved for equivalence |
| Final Reports of the comparisons | |
| References | |
| Measurand | Mole fraction of Formaldehyde in Nitrogen: ~ 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 7 September 2017 Amount-of-substance fraction of formaldehyde (HCHO) in nitrogen
|
| 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 |
| LNE |
Laboratoire national de métrologie et d'essais, France, EURAMET |
| NIM |
National Institute of Metrology, China, APMP |
| NIST |
National Institute of Standards and Technology, United States, SIM |
| NMIJ AIST |
National Metrology Institute of Japan, Japan, APMP |
| NPL |
National Physical Laboratory, United Kingdom, 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).
Please, select items to be printed out, then click on "OK" :
CCQM-K90
MEASURAND : Formaldehyde (HCHO) in nitrogen
|
The key comparison reference value for each cylinder, xRi, is equal to the determination made by the BIPM, using their largest uncertainty.
|
|
The degree of equivalence of laboratory i with respect to the key comparison reference value is given by a pair of terms: |
CCQM-K90
MEASURAND : Formaldehyde (HCHO) in nitrogen
NOMINAL VALUES : 2 µmol/mol
t time in days
a1 loss rate
x0 HCHO mole fraction extrapolated to 14 August 2014 (t = 0)
xi reported values at time t
u(xi) standard uncertainty of xi
xRi reference value at time t
uRi standard uncertainty of xRi
