MEASURAND : Sum of the mass fractions of Ag, Al, Cd, Cr, Ni, and Tl in the bulk of the Zn material
Degrees of equivalence: Di and Ui (k = 2) expressed in mg/kg
MEASURAND : Sum of the mass fractions of Ag, Al, Cd, Cr, Ni, and Tl in the bulk of the Zn material
Degrees of equivalence: Di and Ui (k = 2) expressed in mg/kg
Results are presented under A4 printable format in Summary Results (PDF file).
| Metrology area, Sub-field | Chemistry and Biology, Inorganics |
| Description | Purity of zinc |
| Time of measurements | 2012 - 2013 |
| Status | Approved for equivalence |
| Final Reports of the comparisons | |
| Measurand | Purity of zinc with respect to six metallic impurities: Ag, Al, Cd, Cr, Ni and Tl with nominal mass fractions of the single analytes 0.1 mg/kg to 5.0 mg/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 05 May 2014 Purity of zinc
|
| Pilot institute |
BAM
Bundesanstalt für Materialforschung und -prüfung Germany |
| Contact person | Jochen Vogl +49 30 8104 1144 |
| Pilot laboratory | |
|---|---|
| BAM |
Bundesanstalt für Materialforschung und -prüfung, Germany, EURAMET |
| CENAM |
Centro Nacional de Metrologia, Mexico, SIM |
| INMETRO |
Instituto Nacional de Metrologia, Qualidade e Tecnologia, Brazil, SIM |
| KRISS |
Korea Research Institute of Standards and Science, Korea, Republic of, APMP |
| 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 |
| NRC |
National Research Council, Canada, SIM |
| PTB |
Physikalisch-Technische Bundesanstalt, Germany, EURAMET |
| UME |
TÜBITAK Ulusal Metroloji Enstitüsü, Türkiye, EURAMET |
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MEASURAND : Sum of the mass fractions of Ag, Al, Cd, Cr, Ni, and Tl in the bulk of the Zn material
|
The key comparison reference value, xR, and its combined standard uncertainty, uR, are calculated as explained in section 5.1 on page 10 of the Final Report. |
|
The degree of equivalence of each laboratory i relative to the key comparison reference value is given by a pair of terms: Di and Ui, its expanded uncertainty |
| No pair-wise degrees of equivalence are computed for this comparison. |
MEASURAND : Sum of the mass fractions of Ag, Al, Cd, Cr, Ni, and Tl in the bulk of the Zn material
xi: measurement results reported by laboratory i for the total impurity of zinc expressed as the sum of the mass fractions of Ag, Al, Cd, Cr, Ni, and Tl in the bulk of the Zn material
ui: combined standard uncertainty of xi
ULab i: expanded uncertainty (k = 2) of xi
Laboratory measurements carried out from September 2012 to March 2013.
