MEASURAND : Mass fraction of Al in silicon nitride powder
NOMINAL VALUE : 824 mg/kg
Degrees of equivalence: Di = (xi - xR) and expanded uncertainty (k = 2), both expressed in (mg/kg)
MEASURAND : Mass fraction of Fe in silicon nitride powder
NOMINAL VALUE : 351 mg/kg
Degrees of equivalence: Di = (xi - xR) and expanded uncertainty (k = 2), both expressed in (mg/kg)
MEASURAND : Mass fraction of Ca in silicon nitride powder
NOMINAL VALUE : 105 mg/kg
Degrees of equivalence: Di = (xi - xR) and expanded uncertainty (k = 2), both expressed in (mg/kg)
MEASURAND : Mass fraction of Ti in silicon nitride powder
NOMINAL VALUE : 13.8 mg/kg
Degrees of equivalence: Di = (xi - xR) and expanded uncertainty (k = 2), both expressed in (mg/kg)
MEASURAND : Mass fraction of N in silicon nitride powder
NOMINAL VALUE : 38.5 %
Degrees of equivalence: Di = (xi - xR) and expanded uncertainty (k = 2), both expressed in %
MEASURAND : Mass fraction of Al in silicon nitride powder
NOMINAL VALUE : 824 mg/kg
The table below gives the degrees of equivalence relative to the key comparison reference value:
Results are presented under A4 printable format in Summary Results (.PDF file).
MEASURAND : Mass fraction of Fe in silicon nitride powder
NOMINAL VALUE : 351 mg/kg
The table below gives the degrees of equivalence relative to the key comparison reference value:
Results are presented under A4 printable format in Summary Results (.PDF file).
MEASURAND : Mass fraction of Ca in silicon nitride powder
NOMINAL VALUE : 105 mg/kg
The table below gives the degrees of equivalence relative to the key comparison reference value:
Results are presented under A4 printable format in Summary Results (.PDF file).
MEASURAND : Mass fraction of Ti in silicon nitride powder
NOMINAL VALUE : 13.8 mg/kg
The table below gives the degrees of equivalence relative to the key comparison reference value:
Results are presented under A4 printable format in Summary Results (.PDF file).
MEASURAND : Mass fraction of N in silicon nitride powder
NOMINAL VALUE : 38.5 %
The table below gives the degrees of equivalence relative to the key comparison reference value:
Results are presented under A4 printable format in Summary Results (.PDF file).
| Metrology area, Sub-field | Chemistry and Biology, Inorganics |
| Description | Nitrogen and trace elements in silicon nitride power |
| Time of measurements | 2007 |
| Status | Approved for equivalence |
| Final Reports of the comparisons | |
| Measurand | Mass fractions of Al (824 mg/kg), Fe (351 mg/kg), Ca (105 mg/kg), Ti (13.8 mg/kg), and N (38.5 %) in silicon nitride powder |
| Transfer device | Dedicated bottles containing about 25 g of silicon nitride powder |
| 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 20 January 2009 Determination of Nitrogen and trace elements in silicon nitride powder |
| Pilot institute |
NMIJ AIST
National Metrology Institute of Japan Japan |
| Contact person | A. Hioki +81 29 861 9341 |
| Additional |
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 Al in silicon nitride powder
NOMINAL VALUE : 824 mg/kg
|
The key comparison reference value, xR, is computed as the arithmetic mean of the participant's results. Its expanded uncertainty (k = 2) is UR = 2uR, where uR is the standard deviation of the mean. xR = 824.4 mg/kg, UR = 15.6 mg/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 (mg/kg): Di = (xi - xR) and its expanded uncertainty (k = 2) Ui = (ULab i2 + UR2)1/2. |
| The degrees of equivalence between pair of laboratories have not been computed for this key comparison. |
MEASURAND : Mass fraction of Fe in silicon nitride powder
NOMINAL VALUE : 351 mg/kg
|
The key comparison reference value, xR, is computed as the arithmetic mean of the participant's results. Its expanded uncertainty (k = 2) is UR = 2uR, where uR is the standard deviation of the mean. xR = 351.1 mg/kg, UR = 4.0 mg/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 (mg/kg): Di = (xi - xR) and its expanded uncertainty (k = 2) Ui = (ULab i2 + UR2)1/2. |
| The degrees of equivalence between pair of laboratories have not been computed for this key comparison. |
MEASURAND : Mass fraction of Ca in silicon nitride powder
NOMINAL VALUE : 105 mg/kg
|
The key comparison reference value, xR, is computed as the arithmetic mean of the participant's results. Its expanded uncertainty (k = 2) is UR = 2uR, where uR is the standard deviation of the mean. xR = 105.25 mg/kg, UR = 2.11 mg/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 (mg/kg): Di = (xi - xR) and its expanded uncertainty (k = 2) Ui = (ULab i2 + UR2)1/2. |
| The degrees of equivalence between pair of laboratories have not been computed for this key comparison. |
MEASURAND : Mass fraction of Ti in silicon nitride powder
NOMINAL VALUE : 13.8 mg/kg
|
The key comparison reference value, xR, is computed as the arithmetic mean of the participant's results. Its expanded uncertainty (k = 2) is UR = 2uR, where uR is the standard deviation of the mean. xR = 13.830 mg/kg, UR = 0.060 mg/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 (mg/kg): Di = (xi - xR) and its expanded uncertainty (k = 2) Ui = (ULab i2 + UR2)1/2. |
| The degrees of equivalence between pair of laboratories have not been computed for this key comparison. |
MEASURAND : Mass fraction of N in silicon nitride powder
NOMINAL VALUE : 38.5 %
|
The key comparison reference value, xR, is computed as the arithmetic mean of the participant's results. Its expanded uncertainty (k = 2) is UR = 2uR, where uR is the standard deviation of the mean. xR = 38.533 %, UR = 0.730 % |
| The degree of equivalence of laboratory i relative to the key comparison reference value is given by a pair of terms, both expressed in (mg/kg): Di = (xi - xR) and its expanded uncertainty (k = 2) Ui = (ULab i2 + UR2)1/2. |
| The degrees of equivalence between pair of laboratories have not been computed for this key comparison. |
MEASURAND : Mass fraction of Al in silicon nitride powder
NOMINAL VALUE : 824 mg/kg
xi : result of measurement carried out by laboratory i
ULab i : expanded uncertainty (k = 2) of xi
|
Lab i |
xi / (mg/kg) |
ULab i / (mg/kg) |
| BAM | 838 | 27 |
| CENAM | 806.7 | 33.6 |
| NIST | 816 | 19.4 |
| NMIJ | 837 | 11 |
MEASURAND : Mass fraction of Fe in silicon nitride powder
NOMINAL VALUE : 351 mg/kg
xi : result of measurement carried out by laboratory i
ULab i : expanded uncertainty (k = 2) of xi
|
Lab i |
xi / (mg/kg) |
ULab i / (mg/kg) |
| BAM | 348 | 2.9 |
| NIST | 354.9 | 3.2 |
| NMIJ | 350.5 | 3.5 |
MEASURAND : Mass fraction of Ca in silicon nitride powder
NOMINAL VALUE : 105 mg/kg
xi : result of measurement carried out by laboratory i
ULab i : expanded uncertainty (k = 2) of xi
|
Lab i |
xi / (mg/kg) |
ULab i / (mg/kg) |
| BAM | 104.3 | 0.9 |
| CENAM | 103.3 | 6.5 |
| NIST | 108.2 | 3.5 |
| NMIJ | 105.2 | 1.4 |
MEASURAND : Mass fraction of Ti in silicon nitride powder
NOMINAL VALUE : 13.8 mg/kg
xi : result of measurement carried out by laboratory i
ULab i : expanded uncertainty (k = 2) of xi
|
Lab i |
xi / (mg/kg) |
ULab i / (mg/kg) |
| BAM | 13.86 | 0.05 |
| NMIJ | 13.80 | 0.24 |
MEASURAND : Mass fraction of N in silicon nitride powder
NOMINAL VALUE : 38.5 %
xi : result of measurement carried out by laboratory i
ULab i : expanded uncertainty (k = 2) of xi
|
Lab i |
xi / % |
ULab i / % |
| BAM | 38.99 | 0.65 |
| NIST | 38.80 | 0.80 |
| NMIJ | 37.808 | 0.062 |
