MEASURAND : Amount content of chloride in potassium chloride
Degrees of equivalence: Di = (xi - xR) and expanded uncertainty Ui (k = 2), both expressed in mol/kg
MEASURAND : Amount content of chloride in potassium chloride
Degrees of equivalence with respect to the key comparison reference value expressed in (mol/kg):
Results are presented under A4 printable format in Summary Results (.PDF file).
| Metrology area, Sub-field | Chemistry and Biology, Electrochemistry |
| Description | Assay of potassium chloride |
| Time of measurements | 2007 - 2008 |
| Status | Approved for equivalence |
| Final Reports of the comparisons | |
| Measurand | Amount content of chloride in potassium chloride |
| 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 | This key comparison is also relevant to Inorganics. Results published on 10 February 2010 Amount content of chloride in potassium chloride |
| Pilot institute |
NIM
National Institute of Metrology China |
| Contact person | MA LIANDI +86 10 642 23 987 |
| Pilot laboratory | |
|---|---|
| NIM |
National Institute of Metrology, China, APMP |
| BAM |
Bundesanstalt für Materialforschung und -prüfung, Germany, EURAMET |
| INMETRO |
Instituto Nacional de Metrologia, Qualidade e Tecnologia, Brazil, SIM |
| KRISS |
Korea Research Institute of Standards and Science, Korea, Republic of, APMP |
| NIST |
National Institute of Standards and Technology, United States, SIM |
| NMIJ AIST |
National Metrology Institute of Japan, Japan, APMP |
| SMU |
Slovensky Metrologicky Ustav, Slovakia, EURAMET |
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MEASURAND : Amount content of chloride in potassium chloride
|
The key comparison reference value, xR, is calculated as the median of the participant results. Its standard uncertainty, uR, is computed as explained in section 7.3 of the Final Report. xR = 13.41229 mol/kg, uR = 0.00012 mol/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 mol/kg: Di = (xi - xR) and its expanded uncertainty Ui (k = 2) where Ui = 2(ui2 + uR2)1/2. |
| No pair-wise degrees of equivalence have been computed for this comparison. |
MEASURAND : Amount content of chloride in potassium chloride
xi : result of measurement carried out by laboratory i
ui : combined standard uncertainty of xi
| Lab i | xi / (mol/kg) |
ui / (mol/kg) |
Date of measurement |
| INMETRO | 13.41077 | 0.00146 | Mar 08 |
| KRISS |
13.41214 |
0.00076 |
Mar 08 |
| BAM |
13.41226 |
0.00098 |
Jan-Feb 08 |
| NIM |
13.41229 |
0.00062 |
Nov 07 |
| SMU | 13.41230 | 0.00088 | Mar 08 |
| NIST |
13.4145 |
0.00083 |
Feb 08 |
| NMIJ | 13.4151 | 0.0009 | Feb 08 |
