MEASURAND : Mass fraction of phenylalanine in the CCQM-K78.a sample
Degrees of equivalence : offset Di and expanded uncertainty (k = 2) Ui expressed in µg/g
MEASURAND : Mass fraction of isoleucine in the CCQM-K78.a sample
Degrees of equivalence : offset Di and expanded uncertainty (k = 2) Ui expressed in µg/g
MEASURAND : Mass fraction of leucine in the CCQM-K78.a sample
Degrees of equivalence : offset Di and expanded uncertainty (k = 2) Ui expressed in µg/g
MEASURAND : Mass fraction of proline in the CCQM-K78.a sample
Degrees of equivalence : offset Di and expanded uncertainty (k = 2) Ui expressed in µg/g
MEASURAND : Mass fraction of phenylalanine in the CCQM-K78.a sample
Degrees of equivalence : offset Di and expanded uncertainty (k = 2) Ui expressed in µg/g
Results are presented under A4 printable format in Summary Results (PDF file).
MEASURAND : Mass fraction of isoleucine in the CCQM-K78.a sample
Degrees of equivalence : offset Di and expanded uncertainty (k = 2) Ui expressed in µg/g
Results are presented under A4 printable format in Summary Results (PDF file).
MEASURAND : Mass fraction of leucine in the CCQM-K78.a sample
Degrees of equivalence : offset Di and expanded uncertainty (k = 2) Ui expressed in µg/g
Results are presented under A4 printable format in Summary Results (PDF file).
MEASURAND : Mass fraction of proline in the CCQM-K78.a sample
Degrees of equivalence : offset Di and expanded uncertainty (k = 2) Ui expressed in µg/g
Results are presented under A4 printable format in Summary Results (PDF file).
| Metrology area, Sub-field | Chemistry and Biology, Organics |
| Description | Mass fraction assignment of organic analytes in a multi-component aqueous calibration solution |
| Time of measurements | 2016 - 2017 |
| Status | Approved for equivalence |
| Final Reports of the comparisons | |
| Measurand | Mass fraction in μg/g of Phe in a sample
Nominal values in the range 50 μg/g to 500 μg/g
Optional: Mass fraction content of Leu, Ile and Pro |
| Transfer device | Amber glass ampoules each containing 1 ml of the CCQM-K78.a comparison material, consisting of a gravimetrically prepared solution of amino acids in 0.01 N HCl. |
| 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 14 March 2019 Mass fraction of multicomponent amino acids in dilute HCL solution
|
| Pilot institute |
BIPM
Bureau International des Poids et Mesures BIPM - International Organization |
| Contact person | Steven Westwood +33 (0) 1 45 07 70 57 |
| Pilot laboratory | |
|---|---|
| BIPM |
Bureau International des Poids et Mesures, BIPM - International Organization, N/A |
| EXHM/GCSL-EIM |
National Laboratory of Chemical Metrology/GCSL - Hellenic Institute of Metrology, Greece, EURAMET |
| GL |
Government Laboratory, Hong Kong, China, APMP |
| HSA |
Health Science Authority, Singapore, APMP |
| KRISS |
Korea Research Institute of Standards and Science, Korea, Republic of, APMP |
| LGC |
Laboratory of the Government Chemist, United Kingdom, EURAMET |
| LNE |
Laboratoire national de métrologie et d'essais, France, EURAMET |
| NIM |
National Institute of Metrology, China, APMP |
| NIMT |
National Institute of Metrology (Thailand), Thailand, APMP |
| NIST |
National Institute of Standards and Technology, United States, SIM |
| NMIJ AIST |
National Metrology Institute of Japan, Japan, APMP |
| NMISA |
National Metrology Institute of South Africa, South Africa, AFRIMETS |
| NRC |
National Research Council, Canada, SIM |
| PTB |
Physikalisch-Technische Bundesanstalt, Germany, EURAMET |
| UME |
TÜBITAK Ulusal Metroloji Enstitüsü, Türkiye, EURAMET |
| VNIIM |
D.I. Mendeleyev Institute for Metrology, Rosstandart, Russian Federation, COOMET |
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 phenylalanine in the CCQM-K78.a sample
|
The key comparison reference value for the mass fraction of phenylalanine xR was obtained from the DerSimonian-Laird variance-weighted mean (DSL-mean) of the participants results excluding outliers. The computation of xR and and its associated uncertainty uR is explained in the page 17 of the Final report. xR = 488.5 µg/g, uR = 0.49 µg/g |
| The degree of equivalence of laboratory i with respect to the key comparison reference value is given by a pair of terms: Di = (xi - xR) and Ui, its expanded uncertainty (k = 2), both expressed in µg/g, with Ui = 2(ui2 + uR2)1/2. |
| No pair-wise degrees of equivalence are computed for this comparison. |
MEASURAND : Mass fraction of isoleucine in the CCQM-K78.a sample
|
The key comparison reference value for the mass fraction of phenylalanine xR was obtained from the DerSimonian-Laird variance-weighted mean (DSL-mean) of the participants results excluding outliers. The computation of xR and and its associated uncertainty uR is explained in the page 17 of the Final report. xR = 215.1 µg/g, uR = 0.15 µg/g |
| The degree of equivalence of laboratory i with respect to the key comparison reference value is given by a pair of terms: Di = (xi - xR) and Ui, its expanded uncertainty (k = 2), both expressed in µg/g, with Ui = 2(ui2 + uR2)1/2. |
| No pair-wise degrees of equivalence are computed for this comparison. |
MEASURAND : Mass fraction of leucine in the CCQM-K78.a sample
|
The key comparison reference value for the mass fraction of phenylalanine xR was obtained from the DerSimonian-Laird variance-weighted mean (DSL-mean) of the participants results excluding outliers. The computation of xR and and its associated uncertainty uR is explained in the page 17 of the Final report. xR = 199.9 µg/g, uR = 0.26 µg/g |
| The degree of equivalence of laboratory i with respect to the key comparison reference value is given by a pair of terms: Di = (xi - xR) and Ui, its expanded uncertainty (k = 2), both expressed in µg/g, with Ui = 2(ui2 + uR2)1/2. |
| No pair-wise degrees of equivalence are computed for this comparison. |
MEASURAND : Mass fraction of proline in the CCQM-K78.a sample
|
The key comparison reference value for the mass fraction of phenylalanine xR was obtained from the DerSimonian-Laird variance-weighted mean (DSL-mean) of the participants results excluding outliers. The computation of xR and and its associated uncertainty uR is explained in the page 17 of the Final report. xR = 46.9 µg/g, uR = 0.13 µg/g |
| The degree of equivalence of laboratory i with respect to the key comparison reference value is given by a pair of terms: Di = (xi - xR) and Ui, its expanded uncertainty (k = 2), both expressed in µg/g, with Ui = 2(ui2 + uR2)1/2. |
| No pair-wise degrees of equivalence are computed for this comparison. |
MEASURAND : Mass fraction of phenylalanine in the CCQM-K78.a sample
xi : result of measurement carried out by laboratory i
ui : combined standard uncertainty of xi
MEASURAND : Mass fraction of isoleucine in the CCQM-K78.a sample
xi : result of measurement carried out by laboratory i
ui : combined standard uncertainty of xi
MEASURAND : Mass fraction of leucine in the CCQM-K78.a sample
xi : result of measurement carried out by laboratory i
ui : combined standard uncertainty of xi
MEASURAND : Mass fraction of proline in the CCQM-K78.a sample
xi : result of measurement carried out by laboratory i
ui : combined standard uncertainty of xi
