CCQM-K29 and CCQM-K29.1
MEASURAND : Mass fraction of Chloride in anion calibration solution
NOMINAL VALUE : ~ 1 g/kg
Degrees of equivalence Di and expanded uncertainty Ui (k = 2) expressed in g/kg
* EMPA was a participant in the CIPM MRA at the time of the comparison
Green triangle: participant in the subsequent key comparison CCQM-K29.1, also indicated with "(s)"
MEASURAND : Mass fraction of Phosphate in anion calibration solution
NOMINAL VALUE : ~ 1 g/kg
Degrees of equivalence Di and expanded uncertainty Ui (k = 2) expressed in g/kg
* EMPA was a participant in the CIPM MRA at the time of the comparison
CCQM-K29 and CCQM-K29.1
MEASURAND : Mass fraction of Chloride in anion calibration solution
NOMINAL VALUE : ~ 1 g/kg
Degrees of equivalence: Di and expanded uncertainties Ui (k = 2) expressed in g/kg.
* EMPA was a participant in the CIPM MRA at the time of the comparison
CENAM (s): participant in the subsequent key comparison CCQM-K29.1, also indicated with "(s)"
Results are presented under A4 printable format in Summary Results (.PDF file).
MEASURAND : Mass fraction of Phosphate in anion calibration solution
NOMINAL VALUE : ~ 1 g/kg
Degrees of equivalence: Di and expanded uncertainties Ui (k = 2) expressed in g/kg.
* EMPA was a participant in the CIPM MRA at the time of the comparison
Results are presented under A4 printable format in Summary Results (.PDF file).
| Metrology area, Sub-field | Chemistry and Biology, Inorganics |
| Description | Anion calibration solutions |
| Time of measurements | 2003 - 2004 |
| Status | Approved for equivalence |
| Final Reports of the comparisons | |
| Measurand | Mass fraction of chloride (1 g/kg) and phosphate (1 g/kg) |
| Transfer device | 250 ml samples |
| Comparison type | Key Comparison |
| Consultative Committee | CCQM (Consultative Committee for Amount of Substance) |
| Conducted by | CCQM (Consultative Committee for Amount of Substance) |
| Comments | A subsequent comparison was decided between SMU and CENAM. It is registered into the BIPM key comparison database under the identifier CCQM-K29.1. CCQM-K29 and CCQM-K29.1 results published on 22 September 2006 Anion calibration solutions |
| Pilot institute |
EMPA (CH)
Swiss Federal Laboratories for Materials Testing and Research Switzerland |
| Contact person | M. Weber +41 (0) 71 274 7794 |
| Additional |
| Pilot laboratory | |
|---|---|
| EMPA (CH) |
Swiss Federal Laboratories for Materials Testing and Research, Switzerland, EURAMET |
| BAM |
Bundesanstalt für Materialforschung und -prüfung, Germany, EURAMET |
| CENAM |
Centro Nacional de Metrologia, Mexico, SIM |
| GUM |
Glowny Urzad Miar, Central Office of Measures, Poland, EURAMET |
| INTEC |
Corporación de Investigación Tecnológica de Chile, Chile, SIM |
| KRISS |
Korea Research Institute of Standards and Science, Korea, Republic of, APMP |
| LNE |
Laboratoire national de métrologie et d'essais, France, EURAMET |
| NMIJ AIST |
National Metrology Institute of Japan, Japan, APMP |
| NRCCRM |
National Research Centre for Certified Reference Materials, merged in NIM (National Institute of Metrology) starting 1st January 2006, China, APMP |
| PTB |
Physikalisch-Technische Bundesanstalt, Germany, EURAMET |
| SMU |
Slovensky Metrologicky Ustav, Slovakia, 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-K29 and CCQM-K29.1
MEASURAND : Mass fraction of Chloride in anion calibration solution
NOMINAL VALUE : ~ 1 g/kg
|
The key comparison reference value is the gravimetric value xgrav of the Chloride mass fraction. Its combined standard uncertainty is ugrav. |
|
The degree of equivalence of each laboratory with respect to the key comparison reference value is given by a pair of terms: Di = (xi - xgrav) and Ui, its expanded uncertainty (k = 2), both expressed in g/kg, Ui = 2(ui2 + ugrav2)1/2. |
| The degree of equivalence between two laboratories is given by a pair of terms: Dij = Di - Dj = xi - xj, and Uij, its expanded uncertainty (k = 2), both expressed in g/kg, Uij = 2(ui2 + uj2)1/2. The values of the pair-wise degrees of equivalence are not given here. |
The relative difference between the CCQM-K29 and CCQM-K29.1 gravimetric reference values is very small. The degree of equivalence of CENAM obtained in CCQM-K9.1 is thus transferred to CCQM-K29 without any modification.
MEASURAND : Mass fraction of Phosphate in anion calibration solution
NOMINAL VALUE : ~ 1 g/kg
|
The key comparison reference value is the gravimetric value xgrav of the Phosphate mass fraction. Its combined standard uncertainty is ugrav. |
|
The degree of equivalence of each laboratory with respect to the key comparison reference value is given by a pair of terms: Di = (xi - xgrav) and Ui, its expanded uncertainty (k = 2), both expressed in g/kg, Ui = 2(ui2 + ugrav2)1/2. |
| The degree of equivalence between two laboratories is given by a pair of terms: Dij = Di - Dj = xi - xj, and Uij, its expanded uncertainty (k = 2), both expressed in g/kg, Uij = 2(ui2 + uj2)1/2. The values of the pair-wise degrees of equivalence are not given here. |
CCQM-K29 and CCQM-K29.1
MEASURAND : Mass fraction of Chloride in anion calibration solution
NOMINAL VALUE : ~ 1 g/kg
xi : result of measurement carried out by laboratory i
ui : combined standard uncertainty of xi
xgrav : gravimetric value of the Chloride mass fraction, xgrav = 0.98854 g/kg
ugrav : combined standard uncertainty of xgrav, 2ugrav = 0.00024 g/kg
| Lab i |
xi |
2ui |
Date of measurement |
| NMIJ |
0.9878 |
0.00065 |
2003 - 2004 |
| GUM |
0.9878 |
0.00026 |
2003 - 2004 |
| NIM |
0.98805 |
0.00058 |
2003 - 2004 |
| SMU |
0.98826 |
0.00035 |
2003 - 2004 |
| KRISS |
0.98866 |
0.00050 |
2003 - 2004 |
| BAM |
0.98890 |
0.00036 |
2003 - 2004 |
| EMPA* |
0.98891 |
0.00086 |
2003 - 2004 |
| LNE |
0.9894 |
0.0013 |
2003 - 2004 |
| CENAM |
1.0040 |
0.0036 |
2003 - 2004 |
*EMPA was a participant in the CIPM MRA at the time of the comparison.
Note that KRISS result is the mean of two values obtained from two different methods (see page 7 of the Final report).
xgrav = 1.00065 g/kg and 2ugrav = 0.00024 g/kg
| Lab i |
xi |
2ui |
Date of measurement |
| CENAM |
0.9999 |
0.0048 |
2005 |
| SMU |
1.00116 |
0.00034 |
2005 |
MEASURAND : Mass fraction of Phosphate in anion calibration solution
NOMINAL VALUE : ~ 1 g/kg
xi : result of measurement carried out by laboratory i
ui : combined standard uncertainty of xi
xgrav : gravimetric value of the Phosphate mass fraction, xgrav = 1.00447 g/kg
ugrav : combined standard uncertainty of xgrav, 2ugrav = 0.00066 g/kg
| Lab i |
xi |
2ui |
Date of measurement |
| SMU |
1.00408 |
0.0012 |
2003 - 2004 |
| NIM |
1.0046 |
0.0012 |
2003 - 2004 |
| NMIJ |
1.0048 |
0.0020 |
2003 - 2004 |
| CENAM |
1.005 |
0.010 |
2003 - 2004 |
| EMPA* |
1.00551 |
0.00133 |
2003 - 2004 |
| KRISS |
1.00620 |
0.0046 |
2003 - 2004 |
| PTB |
1.0065 |
0.0020 |
2003 - 2004 |
| GUM |
1.0066 |
0.00058 |
2003 - 2004 |
| LNE |
1.0066 |
0.0037 |
2003 - 2004 |
*EMPA was a participant in the CIPM MRA at the time of the comparison.
Note that KRISS result is the mean of two values obtained from two different methods (see page 7 of the Final report).
