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 (now VNIIM)
Ural Scientific and Research Institute for Metrology, Rosstandart (now D.I. Mendeleyev Institute for Metrology, Rosstandart) Russian Federation |
| Contact person | M. Krasheninina +7 (343) 350 60 63, 355 02 63 |
| Pilot laboratory | |
|---|---|
| UNIIM (now VNIIM) |
Ural Scientific and Research Institute for Metrology, Rosstandart (now D.I. Mendeleyev Institute for Metrology, Rosstandart), Russian Federation, COOMET |
| 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 |
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 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
