CCQM-K109
MEASURANDS : Urea and uric acid i two different serums
Urea : nominal mass fraction around 1500 mg/kg (higher than normal biological range)
Degrees of equivalence: Di = (xi - xR) and expanded uncertainty Ui at a 95 % level of confidence both expressed in mg/kg.
CCQM-K109
MEASURANDS : Urea and uric acid i two different serums
Urea : nominal mass fraction around 335 mg/kg (normal biological range)
Degrees of equivalence: Di = (xi - xR) and expanded uncertainty Ui at a 95 % level of confidence both expressed in mg/kg.
CCQM-K109
MEASURANDS : Urea and uric acid i two different serums
Uric acid : nominal mass fraction around 136 mg/kg (higher than normal biological range)
Degrees of equivalence: Di = (xi - xR) and expanded uncertainty Ui at a 95 % level of confidence both expressed in mg/kg.
CCQM-K109
MEASURANDS : Urea and uric acid i two different serums
Uric acid : nominal mass fraction around 39 mg/kg (normal biological range)
Degrees of equivalence: Di = (xi - xR) and expanded uncertainty Ui at a 95 % level of confidence both expressed in mg/kg.
CCQM-K109
MEASURANDS : Urea and uric acid i two different serums
Urea : nominal mass fraction around 1500 mg/kg (higher than normal biological range)
The table below gives the degrees of equivalence for participant laboratory i.
Results are presented under A4 printable format in Summary Results (.PDF file).
CCQM-K109
MEASURANDS : Urea and uric acid i two different serums
Urea : nominal mass fraction around 335 mg/kg (normal biological range)
The table below gives the degrees of equivalence for participant laboratory i.
Results are presented under A4 printable format in Summary Results (.PDF file).
CCQM-K109
MEASURANDS : Urea and uric acid i two different serums
Uric acid : nominal mass fraction around 136 mg/kg (higher than normal biological range)
The table below gives the degrees of equivalence for participant laboratory i.
Results are presented under A4 printable format in Summary Results (.PDF file).
CCQM-K109
MEASURANDS : Urea and uric acid i two different serums
Uric acid : nominal mass fraction around 39 mg/kg (normal biological range)
The table below gives the degrees of equivalence for participant laboratory i.
Results are presented under A4 printable format in Summary Results (.PDF file).
| Metrology area, Sub-field | Chemistry and Biology, Organics |
| Description | Urea and uric acid in human serum |
| Time of measurements | 2016 |
| Status | Approved for equivalence |
| Final Reports of the comparisons | |
| References | |
| Measurand | Mass fraction of urea (100 mg/kg - 2000 mg/kg) and uric acid (10 mg/kg - 165 mg/kg) in human serum |
| Transfer device | Dedicated samples of human serum |
| Comparison type | Key Comparison |
| Consultative Committee | CCQM (Consultative Committee for Amount of Substance) |
| Conducted by | CCQM (Consultative Committee for Amount of Substance) |
| Comments | Samples were distributed by the coordinating institute. Results published on 30 January 2019 Urea and uric acid in two different serums
|
| Pilot institute |
HSA
Health Science Authority Singapore |
| Contact person | Richard Shin +65 6775 1605 (ext 103) |
| Additional |
| Pilot laboratory | |
|---|---|
| HSA |
Health Science Authority, Singapore, APMP |
| CENAM |
Centro Nacional de Metrologia, Mexico, SIM |
| GL |
Government Laboratory, Hong Kong, China, APMP |
| INMETRO |
Instituto Nacional de Metrologia, Qualidade e Tecnologia, Brazil, SIM |
| 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 |
| NMIA |
National Measurement Institute, Australia, Australia, APMP |
| NMIJ AIST |
National Metrology Institute of Japan, Japan, APMP |
| 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" :
CCQM-K109
MEASURANDS : Urea and uric acid i two different serums
Urea : nominal mass fraction around 1500 mg/kg (higher than normal biological range)
|
The key comparison reference value xR and its associated standard uncertainty uR are computed from a Laplacian weighted median of the reported results, INMETRO and KRISS excluded. xR = 1486.0 mg/kg uR = 9.1 mg/kg |
|
The degree of equivalence of laboratory i relative to the key comparison reference value is given by a pair of terms, both expressed in mg/kg: Di = (xi - xR) and its expanded uncertainty Ui = 2 × ui |
CCQM-K109
MEASURANDS : Urea and uric acid i two different serums
Urea : nominal mass fraction around 335 mg/kg (normal biological range)
|
The key comparison reference value xR and its associated standard uncertainty uR are computed from a Laplacian weighted median of the reported results, INMETRO and KRISS excluded. xR = 334.7 mg/kg uR = 1.8 mg/kg |
|
The degree of equivalence of laboratory i relative to the key comparison reference value is given by a pair of terms, both expressed in mg/kg: Di = (xi - xR) and its expanded uncertainty Ui = 2 × ui |
CCQM-K109
MEASURANDS : Urea and uric acid i two different serums
Uric acid : nominal mass fraction around 136 mg/kg (higher than normal biological range)
|
The key comparison reference value xR and its associated standard uncertainty uR are computed from a Laplacian weighted median of the reported results, VNIIM, INMETRO, CENAM and KRISS excluded. xR = 136.5 mg/kg uR = 0.98 mg/kg |
|
The degree of equivalence of laboratory i relative to the key comparison reference value is given by a pair of terms, both expressed in mg/kg: Di = (xi - xR) and its expanded uncertainty Ui = 2 × ui |
CCQM-K109
MEASURANDS : Urea and uric acid i two different serums
Uric acid : nominal mass fraction around 39 mg/kg (normal biological range)
|
The key comparison reference value xR and its associated standard uncertainty uR are computed from a Laplacian weighted median of the reported results, INMETRO, CENAM and KRISS excluded. xR = 39.39 mg/kg uR = 0.11 mg/kg |
|
The degree of equivalence of laboratory i relative to the key comparison reference value is given by a pair of terms, both expressed in mg/kg: Di = (xi - xR) and its expanded uncertainty Ui = 2 × ui |
CCQM-K109
MEASURANDS : Urea and uric acid i two different serums
Urea : nominal mass fraction around 1500 mg/kg (higher than normal biological range)
xi: measured mass fraction by Labi
ui: combined standard uncertainty of xi
k: expansion factor
Ui: expanded uncertainty of xi at 95 % level of confidence where Ui = k ui
CCQM-K109
MEASURANDS : Urea and uric acid i two different serums
Urea : nominal mass fraction around 335 mg/kg (normal biological range)
xi: measured mass fraction by Labi
ui: combined standard uncertainty of xi
k: expansion factor
Ui: expanded uncertainty of xi at 95 % level of confidence where Ui = k ui
CCQM-K109
MEASURANDS : Urea and uric acid i two different serums
Uric acid : nominal mass fraction around 136 mg/kg (higher than normal biological range)
xi: measured mass fraction by Labi
ui: combined standard uncertainty of xi
k: expansion factor
Ui: expanded uncertainty of xi at 95 % level of confidence where Ui = k ui
CCQM-K109
MEASURANDS : Urea and uric acid i two different serums
Uric acid : nominal mass fraction around 39 mg/kg (normal biological range)
xi: measured mass fraction by Labi
ui: combined standard uncertainty of xi
k: expansion factor
Ui: expanded uncertainty of xi at 95 % level of confidence where Ui = k ui
