CCQM-K175
MEASURAND Amount of substance fraction of HCl in nitrogen
NOMINAL VALUE 30 μmol/mol
Degrees of equivalence represented by Di = (xi - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in μmol/mol.
CCQM-K175
MEASURAND Amount of substance fraction of HCl in nitrogen
NOMINAL VALUE 30 μmol/mol
Degrees of equivalence represented by Di = (xi - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in μmol/mol.
| LABi | Di | Uneg,i | Upos,i | |
|---|---|---|---|---|
µmol/mol |
µmol/mol |
µmol/mol |
||
| NIST | -1.73 | 0.51 | ||
| NPL | 1.21 | 1.30 | ||
| VNIIM | 1.10 | 0.47 | ||
| VSL | 0.04 | 0.93 | ||
| PTB | 0.05 | 0.49 | ||
| KRISS | -0.03 | 0.41 |
| Metrology area, Sub-field | Chemistry and Biology, Gases |
| Description | Hydrogen chloride in Nitrogen |
| Time of measurements | 2022 |
| Status | Approved for equivalence |
| Final Reports of the comparisons | |
| References | |
| Measurand | Amount-of-substance fraction of HCl in nitrogen 30 μmol mol-1 |
| 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) |
| Pilot institute |
KRISS
Korea Research Institute of Standards and Science Korea, Republic of |
| Contact person | Jinsang Jung +82 42 868 5934 |
| Pilot laboratory | |
|---|---|
| KRISS |
Korea Research Institute of Standards and Science, Korea, Republic of, APMP |
| NIST |
National Institute of Standards and Technology, United States, SIM |
| NPL |
National Physical Laboratory, United Kingdom, EURAMET |
| PTB |
Physikalisch-Technische Bundesanstalt, Germany, EURAMET |
| VNIIM |
D.I. Mendeleyev Institute for Metrology, Rosstandart, Russian Federation, COOMET |
| VSL |
VSL, Netherlands, EURAMET |
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CCQM-K175
MEASURAND Amount of substance fraction of HCl in nitrogen
NOMINAL VALUE 30 μmol/mol
The key comparison reference values xR,i and their associated expanded uncertainty UR,i are computed for each participant Labi as specified in Section 3.2 of CCQM-K175 Final report.
| Labi | xR,i | UR,i | |
| μmol/mol | μmol/mol | ||
| NIST | 29.997 | 0.253 | |
| NPL | 30.057 | 0.253 | |
| VNIIM | 29.996 | 0.253 | |
| VSL | 30.061 | 0.253 | |
| PTB | 30.056 | 0.253 | |
| KRISS | 30.013 | 0.253 |
The degree of equivalence of laboratory i relative to the key comparison reference value xR,i is given by a pair of terms, both expressed in μmol/mol:
Di = (xi - xR,i ) and its expanded uncertainty Ui at a 95 % level of confidence calculated according to Section 3.2 of the CCQM-K175 Final report.
CCQM-K175
MEASURAND Amount of substance fraction of HCl in nitrogen
NOMINAL VALUE 30 μmol/mol
xi measured mass fraction reported by laboratory i, Labi
Ui expanded uncertainty of xi at 95 % level of confidence
| Labi | xi | Ui | |
| μmol/mol | μmol/mol | ||
| NIST | 28.27 | 0.44 | |
| NPL | 31.27 | 1.28 | |
| VNIIM | 31.10 | 0.40 | |
| VSL | 30.10 | 0.90 | |
| PTB | 30.11 | 0.42 | |
| KRISS | 29.98 | 0.32 |
