MEASURAND : Mass fraction of nitrogen in dry milk powder
Degrees of equivalence : offset Di and expanded uncertainty (k = 2) Ui expressed in %
MEASURAND : Mass fraction of nitrogen in dry milk powder
Degrees of equivalence : offset Di and expanded uncertainty (k = 2) Ui expressed in %
Results are presented under A4 printable format in Summary Results (PDF file).
Metrology area, Sub-field | Chemistry and Biology, Inorganics |
Description | Nitrogen in milk powder |
Time of measurements | 2017 - 2018 |
Status | Approved for equivalence |
Final Reports of the comparisons | |
Measurand | Mass fraction of nitrogen (1 % to 6 %) |
Transfer device | Sample of dry milk powder with mass 100 g that is packed into special water-proof double polyethylene packages hermetically sealed with double seam. |
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 01 April 2019 Mass fraction of nitrogen in dry milk powder
|
Pilot institute |
UNIIM
Ural Scientific and Research Institute for Metrology, Rosstandart Russian Federation |
Contact person | M. Krasheninina +7 (343) 350 60 63, 355 02 63 |
CENAM |
Centro Nacional de Metrologia, Mexico, SIM |
GL |
Government Laboratory, Hong Kong, China, APMP |
INACAL |
National Institute for Quality, Peru, SIM |
INM (CO) |
Instituto Nacional de Metrología de Colombia, Colombia, SIM |
INMETRO |
Instituto Nacional de Metrologia, Qualidade e Tecnologia, Brazil, SIM |
INTI |
Instituto Nacional de Tecnologia Industrial, Argentina, SIM |
KazStandard |
Kazakhstan Institute of Standardization and Metrology, Kazakhstan, COOMET |
RISE |
Research Institutes of Sweden AB, Sweden, EURAMET |
SE "Ukrmetrteststandard" |
State Enterprise "Ukrmetrteststandard", Ukraine, EURAMET |
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MEASURAND : Mass fraction of nitrogen in dry milk powder
The key comparison reference value xR was calculated as the median of the participants' results excluding KazInMetr's results, and its associated uncertainty uR is calculated according to Equation 8 on the page 15 of the Final report. xR = 2.887 %, uR = 0.011 % |
The degree of equivalence of laboratory i with respect to the key comparison reference value is given by a pair of terms both expressed in %: Di = (xi - xR) and Ui, its expanded uncertainty (k = 2), where Ui = 2(ui2 + uR2)1/2. |
No pair-wise degrees of equivalence are computed for this comparison. |
MEASURAND : Mass fraction of nitrogen in dry milk powder
xi : result of measurement carried out by laboratory i
ui : combined standard uncertainty of xi