CCQM-K12 and EURAMET.QM-K12
MEASURAND : Mass fraction of creatinine in human serum
Material II - elevated range
Degrees of equivalence Di and expanded uncertainty Ui (95% level of confidence) expressed in relative terms
CCQM-K12 and EURAMET.QM-K12
MEASURAND : Mass fraction of creatinine in human serum
Material II : elevated range
Degrees of equivalence Di and expanded uncertainty Ui (95% level of confidence) expressed in relative terms
Dark blue indicates participants in CCQM-K12 (Material II)
Blue indicates participants in EURAMET.QM-K12 (Material A)
Green indicates participants in EURAMET.QM-K12 (Material B)
The degrees of equivalence expressed in µg/g, and the pair-wise degrees of equivalence expressed in µg/g given below are for participants in CCQM-K12 only.
| Lab i | Di | Ui |
| / (µg/g) | / (µg/g) | |
| IRMM | 0.075 | 0.487 |
| KRISS | -0.106 | 0.331 |
| LGC | -0.031 | 0.125 |
| NIST | 0.063 | 0.205 |
| PTB | 0.073 | 0.161 |
Results are presented under A4 printable format in Summary Results (PDF file).
| Metrology area, Sub-field | Chemistry and Biology, Organics |
| Description | Creatinine in human serum |
| Time of measurements | 2011 |
| Status | Approved for equivalence |
| Final Reports of the comparisons | |
| Measurand | Nominal mass fraction: 1 µg/g to 100 µg/g |
| Transfer device | Dedicated samples |
| Comparison type | Key Comparison |
| Consultative Committee | CCQM (Consultative Committee for Amount of Substance) |
| Conducted by | EURAMET (European Association of National Metrology Institutes) |
| RMO Internal Identifier | EURAMET Project No 1176 |
| Comments | Results published on 05 May 2013 EURAMET.QM-K12 results are linked to those of CCQM-K12 for Material II Creatinine in human serum |
| Pilot institute |
LGC
Laboratory of the Government Chemist United Kingdom |
| Contact person | Gavin O'Connor +44 (0) 208 943 7318 |
| Pilot laboratory | |
|---|---|
| LGC |
Laboratory of the Government Chemist, United Kingdom, EURAMET |
| EXHM/GCSL-EIM |
National Laboratory of Chemical Metrology/GCSL - Hellenic Institute of Metrology, Greece, EURAMET |
| HSA |
Health Science Authority, Singapore, APMP |
| LNE |
Laboratoire national de métrologie et d'essais, France, EURAMET |
| PTB |
Physikalisch-Technische Bundesanstalt, Germany, 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" :
CCQM-K12 and EURAMET.QM-K12
MEASURAND : Mass fraction of creatinine in human serum
Material II - elevated range
|
The key comparison reference value, xR, is calculated as the mean of the participants' results excluding IRMM: xR = 18.645 µg/g. |
|
The degree of equivalence of each laboratory with respect to the key comparison reference value is given by a pair of terms: Di = (xi - xR) and Ui, its expanded uncertainty corresponding to a 95% level of confidence, both expressed in µg/g. |
| The degree of equivalence between two laboratories is given by a pair of terms: Dij = Di - Dj = (xi - xR) - (xj - xR) = (xi - xj) and Uij, its expanded uncertainty corresponding to a 95% level of confidence, both expressed in µg/g. |
|
The linkage is obtained through the common participation of PTB and LGC in both key comparisons and is explained on page 14 of the EURAMET.QM-K12 Final Report. |
No pair-wise degrees of equivalence involving participants in EURAMET.QM-K12 only have been computed.
CCQM-K12 and EURAMET.QM-K12
MEASURAND : Mass fraction of creatinine in human serum
Material II - elevated range
xi : result of measurement carried out by laboratory i
ui : combined standard uncertainty of xi
MEASURAND : Mass fraction of creatinine in human serum
xi-EUR : result of measurement carried out by laboratory i participating in EURAMET.QM-K12
ui-EUR : combined standard uncertainty of xi-EUR
Material A - high level
Material B - low level
