CCQM-K96 and CCQM-K96.1
MEASURAND : Amount content of oxidants as dichromate
NOMINAL VALUE : 3.4 mol/kg
Degrees of equivalence, Di and expanded uncertainty Ui (k = 2), expressed in relative terms
*CENAM results for titration with potentiometric indication
Red diamonds: participants in CCQM-K96
Blue square: participant in CCQM-K96.1
CCQM-K96 and CCQM-K96.1
MEASURAND : Amount content of oxidants as dichromate
NOMINAL VALUE : 3.4 mol/kg
Degrees of equivalence, Di and expanded uncertainty Ui (k = 2), expressed in relative terms
*CENAM results for titration with potentiometric indication
Results are presented under A4 printable format in Summary Results (PDF file).
| Metrology area, Sub-field | Chemistry and Biology, Electrochemistry |
| Description | Assay of potassium dichromate |
| Time of measurements | 2011 - 2012 |
| Status | Approved for equivalence |
| Final Reports of the comparisons | |
| Measurand | Amount content of oxidants expressed as potassium dichromate, nominal value 3.4 mol/kg |
| Transfer device | A pure potassium dichromate sample |
| 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 26 July 2013 Assay of potassium dichromate |
| Pilot institute |
SMU
Slovensky Metrologicky Ustav Slovakia |
| Contact person | Michal Mariassy +421 2 602 94 522 |
| Pilot laboratory | |
|---|---|
| SMU |
Slovensky Metrologicky Ustav, Slovakia, EURAMET |
| CENAM |
Centro Nacional de Metrologia, Mexico, SIM |
| INMETRO |
Instituto Nacional de Metrologia, Qualidade e Tecnologia, Brazil, SIM |
| KRISS |
Korea Research Institute of Standards and Science, Korea, Republic of, APMP |
| NIM |
National Institute of Metrology, China, APMP |
| NIST |
National Institute of Standards and Technology, United States, SIM |
| NMIJ AIST |
National Metrology Institute of Japan, Japan, APMP |
| UNIIM |
Ural Scientific and Research 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-K96 and CCQM-K96.1
MEASURAND : Amount content of oxidants as dichromate
NOMINAL VALUE : 3.4 mol/kg
| The key comparison reference value, xR, is calculated as the weighted mean of all participant results, and its standard uncertainty, uR, is calculated according to the external consistency concept multiplying the uncertainty of the weighted mean by the Birge ratio. |
xR = 3.397022 mol/kg and uR = 0.000063 mol/kg
|
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)/xR and Ui, its expanded uncertainty (k = 2), Ui = [2(ui2 + uR2)1/2]/xR, both expressed in relative terms. |
The NIM (2013) participated in CCQM-K96.1 where KRISS acted as linking institute. The linking procedure is described in the CCQM-K96.1 Final Report.
CCQM-K96 and CCQM-K96.1
MEASURAND : Amount content of oxidants as dichromate
NOMINAL VALUE : 3.4 mol/kg
xi : result of measurement carried out by laboratory i
ui : combined standard uncertainty of xi
*CENAM reported results for titration with potentiometric indication
MEASURAND : Amount content of oxidants as dichromate
NOMINAL VALUE : 3.4 mol/kg
Laboratory individual measurement results of CCQM-96.1 are given in the CCQM-K96.1 Final Report. The measurements were carried out in 2013.
