CCQM-K26.a and EURAMET.QM-K26.a
MEASURAND : Amount-of-substance fraction of Nitrogen monoxide (NO) in Nitrogen (N2)
Graph of equivalence
Red diamonds: participants in CCQM-K26.a
Blue triangles: participants in EURAMET.QM-K26.a
CCQM-K26.a and EURAMET.QM-K26.a
MEASURAND : Amount-of-substance fraction of Nitrogen monoxide (NO) in Nitrogen (N2)
Degrees of equivalence, Di and expanded uncertainty Ui (k = 2), both expressed in nmol/mol
Dark blue: participants in CCQM-K26.a
Blue: participants in EURAMET.QM-K26.a
Results are presented under printable format in Summary Results (PDF file).
| Metrology area, Sub-field | Chemistry and Biology, Gases |
| Description | Reactive gases: Nitrogen monoxide in Nitrogen |
| Time of measurements | 2012 |
| Status | Approved for equivalence |
| Final Reports of the comparisons | |
| Measurand | Amount-of-substance fraction of Nitrogen monoxide in Nitrogen at ambient levels (Nominal value: 450 nmol/mol) |
| Transfer device | Gas cylinders |
| Comparison type | Key Comparison |
| Consultative Committee | CCQM (Consultative Committee for Amount of Substance) |
| Conducted by | EURAMET (European Association of National Metrology Institutes) |
| RMO Internal Identifier | EUROMET Project No 1183 |
| Comments |
Results published on 11 December 2014 EURAMET.QM-K26.a results are linked to those of CCQM-K26.a Nitrogen monoxide in Nitrogen
|
| Pilot institute |
NPL
National Physical Laboratory United Kingdom |
| Contact person | Paul BREWER +44 (0) 208 943 6007 |
| Pilot laboratory | |
|---|---|
| NPL |
National Physical Laboratory, United Kingdom, EURAMET |
| BAM |
Bundesanstalt für Materialforschung und -prüfung, Germany, EURAMET |
| BEV |
Bundesamt für Eich- und Vermessungswesen, Austria, EURAMET |
| CHMI |
Czech Hydrometeorological Institute, Czechia, EURAMET |
| GUM |
Glowny Urzad Miar, Central Office of Measures, Poland, EURAMET |
| INRIM |
Istituto Nazionale di Ricerca Metrologica, Italy, EURAMET |
| JRC |
Joint Research Centre, European Union, EURAMET |
| LNE |
Laboratoire national de métrologie et d'essais, France, EURAMET |
| METAS |
Federal Institute of Metrology, Switzerland, EURAMET |
| MIKES-FMI |
Finnish Meteorological Institute, Finland, EURAMET |
| MKEH |
Hungarian Trade Licensing Office; now BFKH, Hungary, EURAMET |
| SMU |
Slovensky Metrologicky Ustav, Slovakia, EURAMET |
| UBA |
Umweltbundesamt, Federal Environment Agency, Germany, EURAMET |
| 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-K26.a and EURAMET.QM-K26.a
MEASURAND : Amount-of-substance fraction of Nitrogen monoxide (NO) in Nitrogen (N2)
NOMINAL VALUE : 720 nmol/mol
In order to eliminate any effects of drift due to instability in the amount fraction in the travelling cylinders, the drift of each travelling cylinder was determined individually by the Pilot Laboratory, the NPL, as explained on page 7 and in Annex B of the Final Report.
Then, the amount fraction in the cylinder sent to laboratory i, xiR, was calculated at the time when it was analyzed by this laboratory, together with the corresponding standard uncertainty, uiR (see on page 11 of the Final Report).
One component of the uncertainty uiR corresponds to the preparation by gravimetry and is estimated to be equal to 0.1 nmol/mol for all cylinders.
|
There is no single key comparison reference value for this comparison. The reference value for laboratory i is xiR with standard uncertainty uiR.
|
| The degree of equivalence of each laboratory i with respect to the reference value is given by a pair of terms: Di = (xi - xi R) and Ui, its expanded uncertainty (k = 2), both expressed in nmol/mol, Ui = 2(ui2 + ui R2)1/2. |
| No pair-wise degrees of equivalence are computed for this key comparison. |
MEASURAND : Amount-of-substance fraction of Nitrogen monoxide (NO) in Nitrogen (N2)
NOMINAL VALUE : 450 nmol/mol
The EURAMET.QM-K26.a data are treated in a similar way (see Section 8 of the Final Report), which makes it possible to extend the CCQM-K26.a graph of equivalence with results of participants in the EURAMET.QM-K26.a key comparison.
CCQM-K26.a and EURAMET.QM-K26.a
MEASURAND : Amount-of-substance fraction of Nitrogen monoxide (NO) in Nitrogen (N2)
NOMINAL VALUE : 720 nmol/mol
xi : result of measurement carried out by laboratory i
ui : combined standard uncertainty of xi
| Lab i |
Cylinder number |
xi |
ui / (nmol/mol) |
Date of measurement |
| CENAM | 22402 | 727.00 | 3.00 | 29 Sep 2004 |
| NMIJ | 22492 | 717.70 | 2.30 | 22 Jul 2004 |
| CHMI | 22418 | 715.80 | 3.75 | 16 Jul 2004 |
| FMI | 22416 | 721.10 | 5.77 | 09 Sep 2004 |
| JRC | 22496 | 727.80 | 1.45 | 25 Jun 2004 |
| KRISS |
22423 |
713.20 |
4.35 |
27 Aug 2004 |
| LNE |
22422 |
725.70 |
2.90 |
30 Jun 2004 |
| NIST |
22396 |
715.00 |
3.50 |
30 Jun 2004 |
| VSL |
22414 |
718.10 |
4.00 |
26 Aug 2004 |
| NPL | 22412 | 722.27 | 1.30 | 31 Aug 2004 |
| UBA |
22411 |
713.80 |
2.91 |
22 Jul 2004 |
| VNIIM | 22403 | 711.30 | 4.62 | 14 Oct 2004 |
MEASURAND : Amount-of-substance fraction of Nitrogen monoxide (NO) in Nitrogen (N2)
NOMINAL VALUE : 450 nmol/mol
Laboratories' measurements are given in Table 3 on page 9 of the EURAMET.QM-K26.a Final Report.
Measurements were carried out in 2012.
