MEASURAND : Mass fraction of Arsenic in drinking water
Degrees of equivalence Di and expanded uncertainty Ui (k = 2) expressed in µg/kg
MEASURAND : Mass fraction of Boron in drinking water
Degrees of equivalence Di and expanded uncertainty Ui (k = 2) expressed in µg/kg
MEASURAND : Mass fraction of Cadmium in drinking water
Degrees of equivalence Di and expanded uncertainty Ui (k = 2) expressed in µg/kg
Note:
DRCChem-LIPI = 0.468 µg/kg and URCChem-LIPI = 0.150 µg/kg
DKEBS = 0.589 µg/kg and UKEBS = 0.441 µg/kg
MEASURAND : Mass fraction of Calcium in drinking water
Degrees of equivalence Di and expanded uncertainty Ui (k = 2) expressed in mg/kg
MEASURAND : Mass fraction of Chromium in drinking water
Degrees of equivalence Di and expanded uncertainty Ui (k = 2) expressed in µg/kg
MEASURAND : Mass fraction of Hexavalent Chromium in drinking water
Degrees of equivalence Di and expanded uncertainty Ui (k = 2) expressed in µg/kg
Degrees of equivalence expressed in relative terms
MEASURAND : Mass fraction of Arsenic in drinking water
Degrees of equivalence Di and expanded uncertainty Ui (k = 2) expressed in µg/kg
* the results from NIST, VNIIM, and KEBS are not included in the calculation of the key comparison reference value.
Results are presented under A4 printable format in Summary Results (PDF file).
MEASURAND : Mass fraction of Boron in drinking water
Degrees of equivalence Di and expanded uncertainty Ui (k = 2) expressed in µg/kg
* the results from KEBS are not included in the calculation of the key comparison reference value.
Results are presented under A4 printable format in Summary Results (PDF file).
MEASURAND : Mass fraction of Cadmium in drinking water
Degrees of equivalence Di and expanded uncertainty Ui (k = 2) expressed in µg/kg
* the results from RCChem-LIPI and KEBS are not included in the calculation of the key comparison reference value.
Results are presented under A4 printable format in Summary Results (PDF file).
MEASURAND : Mass fraction of Calcium in drinking water
Degrees of equivalence Di and expanded uncertainty Ui (k = 2) expressed in mg/kg
* the results from RCChem-LIPI are not included in the calculation of the key comparison reference value.
Results are presented under A4 printable format in Summary Results (PDF file).
MEASURAND : Mass fraction of Chromium in drinking water
Degrees of equivalence Di and expanded uncertainty Ui (k = 2) expressed in µg/kg
* the results from KEBS are not included in the calculation of the key comparison reference value.
Results are presented under A4 printable format in Summary Results (PDF file).
MEASURAND : Mass fraction of Hexavalent Chromium in drinking water
Degrees of equivalence Di and expanded uncertainty Ui (k = 2) expressed in µg/kg
Degrees of equivalence expressed in relative terms
Results are presented under A4 printable format in Summary Results (PDF file).
| Metrology area, Sub-field | Chemistry and Biology, Inorganics |
| Description | Trace elements and Chromium speciation in drinking water |
| Time of measurements | 2014 - 2015 |
| Status | Approved for equivalence |
| Final Reports of the comparisons | |
| Measurand | Mass fraction of As, B, Cr and Cd in µg/kg and Ca in mg/kg;
Mass fraction of Cr(VI) in µg/kg |
| Transfer device | Dedicated samples |
| 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 31 March 2017 Trace elements and Chromium speciation in drinking water
|
| Pilot institute |
GL
Government Laboratory Hong Kong, China |
| Contact person | Wai hong Fung +852 2762 3853 |
| Pilot laboratory | |
|---|---|
| GL |
Government Laboratory, Hong Kong, China, APMP |
| BIM |
Bulgarian Institute of Metrology, Bulgaria, EURAMET |
| CENAM |
Centro Nacional de Metrologia, Mexico, SIM |
| DRICM |
Designated Reference Institute for Chemical Measurements, Bangladesh, APMP |
| EXHM/GCSL-EIM |
National Laboratory of Chemical Metrology/GCSL - Hellenic Institute of Metrology, Greece, EURAMET |
| HSA |
Health Science Authority, Singapore, APMP |
| INACAL |
National Institute for Quality, Peru, SIM |
| INMETRO |
Instituto Nacional de Metrologia, Qualidade e Tecnologia, Brazil, SIM |
| INRAP |
Institut National de Recherche et d'Analyse Physico-Chimique, Tunisia, AFRIMETS |
| ISP |
Instituto de Salud Pública, Chile, SIM |
| KEBS |
Kenya Bureau of Standards, Kenya, AFRIMETS |
| KRISS |
Korea Research Institute of Standards and Science, Korea, Republic of, APMP |
| LATU |
Laboratorio Tecnologico del Uruguay, Uruguay, SIM |
| LNE |
Laboratoire national de métrologie et d'essais, France, EURAMET |
| MIKES-SYKE |
Finnish Environment Institute, Finland, EURAMET |
| MIRS/IJS/F-2,O-2 |
MIRS/Jozef Stefan Institute/Low and Medium Energy Physics F2, Environmental Sciences O2, Slovenia, 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 |
| NRC |
National Research Council, Canada, SIM |
| PTB |
Physikalisch-Technische Bundesanstalt, Germany, EURAMET |
| RCChem-LIPI |
Research Center for Chemistry – Indonesian Institute of Sciences, Indonesia, APMP |
| STD-ITDI |
Standards and Testing Division, Industrial Technology Development Institute, Philippines, APMP |
| 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 Arsenic in drinking water
|
The key comparison reference value, xR, is calculated as the median of the participants’ results without the results from NIST, VNIIM, and KEBS. Its standard uncertainty, uR, is computed as explained in section 5.3 of the Final Report (Part A). xR = 5.346 µg/kg and uR = 0.012 µg/kg |
| The degree of equivalence of each laboratory i with respect to the key comparison reference value is given by a pair of terms, both expressed in µg/kg: Di = (xi - xR) and Ui, its expanded uncertainty (k = 2), Ui = 2(ui2 + uR2)1/2 . |
| No pair-wise degrees of equivalence are computed here. |
MEASURAND : Mass fraction of Boron in drinking water
|
The key comparison reference value, xR, is calculated as the arithmetic mean of the participants’ results without the results from KEBS. Its standard uncertainty, uR, is computed as explained in section 5.3 of the Final Report (Part A). xR = 42.87 µg/kg and uR = 0.29 µg/kg |
| The degree of equivalence of each laboratory i with respect to the key comparison reference value is given by a pair of terms, both expressed in µg/kg: Di = (xi - xR) and Ui, its expanded uncertainty (k = 2), Ui = 2(ui2 + uR2)1/2 . |
| No pair-wise degrees of equivalence are computed here. |
MEASURAND : Mass fraction of Cadmium in drinking water
|
The key comparison reference value, xR, is calculated as the median of the participants’ results without the results from KEBS and RCChem-LIPI. Its standard uncertainty, uR, is computed as explained in section 5.3 of the Final Report (Part A). xR = 0.352 µg/kg and uR = 0.003 µg/kg |
| The degree of equivalence of each laboratory i with respect to the key comparison reference value is given by a pair of terms, both expressed in µg/kg: Di = (xi - xR) and Ui, its expanded uncertainty (k = 2), Ui = 2(ui2 + uR2)1/2 . |
| No pair-wise degrees of equivalence are computed here. |
MEASURAND : Mass fraction of Calcium in drinking water
|
The key comparison reference value, xR, is calculated as the median of the participants’ results without the results from RCChem-LIPI. Its standard uncertainty, uR, is computed as explained in section 5.3 of the Final Report (Part A). xR = 18.36 mg/kg and uR = 0.07 mg/kg |
| The degree of equivalence of each laboratory i with respect to the key comparison reference value is given by a pair of terms, both expressed in mg/kg: Di = (xi - xR) and Ui, its expanded uncertainty (k = 2), Ui = 2(ui2 + uR2)1/2 . |
| No pair-wise degrees of equivalence are computed here. |
MEASURAND : Mass fraction of Chromium in drinking water
|
The key comparison reference value, xR, is calculated as the median of the participants’ results without the results from KEBS. Its standard uncertainty, uR, is computed as explained in section 5.3 of the Final Report (Part A). xR = 5.080 µg/kg and uR = 0.018 µg/kg |
| The degree of equivalence of each laboratory i with respect to the key comparison reference value is given by a pair of terms, both expressed in µg/kg: Di = (xi - xR) and Ui, its expanded uncertainty (k = 2), Ui = 2(ui2 + uR2)1/2 . |
| No pair-wise degrees of equivalence are computed here. |
MEASURAND : Mass fraction of Hexavalent Chromium in drinking water
|
The key comparison reference value, xR, is calculated as the median of the participants’ results, and its standard uncertainty, uR, is computed as explained in section 5.3 of the Final Report (Part B). xR = 62.67 µg/kg and uR = 0.329 µg/kg |
| The degree of equivalence of each laboratory i with respect to the key comparison reference value is given by a pair of terms, both expressed in µg/kg: Di = (xi - xR) and Ui, its expanded uncertainty (k = 2) is calculated as explained in section 5.4 of the Final Report (Part B). The degrees of equivalence are also expressed in relative terms. |
| No pair-wise degrees of equivalence are computed here. |
MEASURAND : Mass fraction of Arsenic in drinking water
xi : result of measurement carried out by laboratory i
ui : combined standard uncertainty of xi
MEASURAND : Mass fraction of Boron in drinking water
xi : result of measurement carried out by laboratory i
ui : combined standard uncertainty of xi
MEASURAND : Mass fraction of Cadmium in drinking water
xi : result of measurement carried out by laboratory i
ui : combined standard uncertainty of xi
MEASURAND : Mass fraction of Calcium in drinking water
xi : result of measurement carried out by laboratory i
ui : combined standard uncertainty of xi
MEASURAND : Mass fraction of Chromium in drinking water
xi : result of measurement carried out by laboratory i
ui : combined standard uncertainty of xi
MEASURAND : Mass fraction of Hexavalent Chromium in drinking water
xi : result of measurement carried out by laboratory i
ui : combined standard uncertainty of xi
