MEASURAND : Mass fraction of nitrate in a calibration solution
Degrees of equivalence: Di = (xi - xR) and expanded uncertainty Ui expressed in g/kg
MEASURAND : Mass fraction of nitrite in a calibration solution
Degrees of equivalence: Di = (xi - xR) and expanded uncertainty Ui expressed in g/kg
MEASURAND : Mass fraction of nitrate in a calibration solution
The table below gives the degrees of equivalence for each participant
Results are presented under A4 printable format in Summary Results (.PDF file).
MEASURAND : Mass fraction of nitrite in a calibration solution
The table below gives the degrees of equivalence for each participant
Results are presented under A4 printable format in Summary Results (.PDF file).
| Metrology area, Sub-field | Chemistry and Biology, Inorganics |
| Description | Nitrite and nitrate in calibration solutions |
| Time of measurements | 2007 |
| Status | Approved for equivalence |
| Final Reports of the comparisons | |
| Measurand | Mass fractions of anions in calibration solutions of nitrate and nitrite: ~ 1 g/kg |
| Transfer device | Dedicated samples |
| 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 29 September 2008 Nitrate and nitrite in calibration solutions |
| Pilot institute |
SMU
Slovensky Metrologicky Ustav Slovakia |
| Contact person | Michal Mariassy +421 2 602 94 522 |
| Pilot laboratory | |
|---|---|
| SMU |
Slovensky Metrologicky Ustav, Slovakia, EURAMET |
| INTI |
Instituto Nacional de Tecnologia Industrial, Argentina, SIM |
| 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 |
| VNIIM |
D.I. Mendeleyev Institute for Metrology, Rosstandart, Russian Federation, COOMET |
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" :
MEASURAND : Mass fraction of nitrate in a calibration solution
|
The key comparison reference value, xR, is chosen to be the preparation value, as explained on page 6 of the CCQM-K59 Final Report. Its expanded uncertainty, UR, corresponds to the coverage factor k = 2. xR = 1.0168 g/kg, UR = 0.0007 g/kg |
| The degree of equivalence of laboratory i relative to the key comparison reference value is given by a pair of terms, both expressed in g/kg: Di = (xi - xR) and its expanded uncertainty Ui = (ULab i2 + UR2)1/2. |
| Pair-wise degrees of equivalence are not computed for this key comparison. |
MEASURAND : Mass fraction of nitrite in a calibration solution
|
The key comparison reference value, xR, is chosen to be the preparation value, as explained on page 6 of the CCQM-K59 Final Report. Its expanded uncertainty, UR, corresponds to the coverage factor k = 2. xR = 1.0119 g/kg, UR = 0.0018 g/kg |
| The degree of equivalence of laboratory i relative to the key comparison reference value is given by a pair of terms, both expressed in g/kg: Di = (xi - xR) and its expanded uncertainty Ui = (ULab i2 + UR2)1/2. |
| Pair-wise degrees of equivalence are not computed for this key comparison. |
MEASURAND : Mass fraction of nitrate in a calibration solution
xi : result of measurement carried out by laboratory i
ULab i : expanded uncertainty (k = 2) of laboratory i
| Lab i | xi / (g/kg) |
ULab i / (g/kg) |
| VNIIM | 0.9984 | 0.0145 |
| LNE |
1.0122 |
0.0047 |
| NMIJ |
1.0154 |
0.0016 |
| SMU |
1.0167 |
0.00087 |
| NIM | 1.0171 | 0.0011 |
| KRISS | 1.0194 | 0.0010 |
| NIST | 1.0209 | 0.0024 |
| INTI |
1.0220 |
0.0050 |
MEASURAND : Mass fraction of nitrite in a calibration solution
xi : result of measurement carried out by laboratory i
ULab i : expanded uncertainty (k = 2) of laboratory i
| Lab i | xi / (g/kg) |
ULab i / (g/kg) |
| LNE | 0.9961 | 0.0066 |
| VNIIM |
1.0038 |
0.0105 |
| NMIJ |
1.0118 |
0.0020 |
| SMU |
1.0120 |
0.0016 |
| NIM | 1.0139 | 0.0013 |
| KRISS | 1.0156 | 0.0018 |
| INTI |
1.0160 |
0.0040 |
