CCQM-K73.2018
MEASURAND Amount content of H+ in hydrochloric acid solutions
NOMINAL VALUE 0.1 mol/kg
Degrees of equivalence represented by Di = (xI - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in mol/kg
CCQM-K73.2018
MEASURAND Amount content of H+ in hydrochloric acid solutions
NOMINAL VALUE 0.1 mol/kg
Degrees of equivalence represented by Di = (xI - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in mol/kg
| LABi | Di | Uneg,i | Upos,i | |
|---|---|---|---|---|
mol/kg |
mol/kg |
mol/kg |
||
| CENAM | 0.0000052 | 0.0000286 | ||
| CMI | -0.0000081 | 0.0000279 | ||
| DFM | -0.0000002 | 0.0000272 | ||
| GUM | 0.0000176 | 0.0000391 | ||
| INM | 0.000025 | 0.000176 | ||
| INMETRO | 0.0000134 | 0.0000634 | ||
| INTI | 0.00020 | 0.00027 | ||
| KRISS | 0.0000085 | 0.0000348 | ||
| LNE | 0.00017 | 0.00031 | ||
| NIM | 0.000007 | 0.000034 | ||
| NMIJ | 0.0000155 | 0.0000309 | ||
| PTB | -0.0000092 | 0.0000285 | ||
| SMU | -0.0000041 | 0.0000297 | ||
| UME | -0.000076 | 0.000035 | ||
| UNIIM | 0.000071 | 0.000047 | ||
| VNIIFTRI | 0.000076 | 0.000216 | ||
| CENAM additional | -0.0000037 | 0.0000406 | ||
| KRISS additional | 0.0000085 | 0.0000348 | ||
| NIM additional | 0.000005 | 0.000104 | ||
| PTB additional | 0.0000059 | 0.0000826 | ||
| SMU additional | 0.0000187 | 0.0000495 |
| Metrology area, Sub-field | Chemistry and Biology, Electrochemistry |
| Description | Concentration of H+ in an HCl solution |
| Time of measurements | 2018 - 2019 |
| Status | Approved for equivalence |
| Final Reports of the comparisons | |
| Measurand | Amount content Nominal molality of 0.1 mol/kg |
| Transfer device | 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 12 February 2021 |
| Pilot institute |
PTB
Physikalisch-Technische Bundesanstalt Germany |
| Contact person | Steffen SEITZ +49 531 592 3130 |
| Pilot laboratory | |
|---|---|
| PTB |
Physikalisch-Technische Bundesanstalt, Germany, EURAMET |
| CENAM |
Centro Nacional de Metrologia, Mexico, SIM |
| CMI |
Czech Metrology Institute, Czechia, EURAMET |
| GUM |
Glowny Urzad Miar, Central Office of Measures, Poland, EURAMET |
| INM (CO) |
Instituto Nacional de Metrología de Colombia, Colombia, SIM |
| INMETRO |
Instituto Nacional de Metrologia, Qualidade e Tecnologia, Brazil, SIM |
| INTI |
Instituto Nacional de Tecnologia Industrial, Argentina, SIM |
| KRISS |
Korea Research Institute of Standards and Science, Korea, Republic of, APMP |
| LNE |
Laboratoire national de métrologie et d'essais, France, EURAMET |
| NMIJ AIST |
National Metrology Institute of Japan, Japan, APMP |
| SMU |
Slovensky Metrologicky Ustav, Slovakia, EURAMET |
| UME |
TÜBITAK Ulusal Metroloji Enstitüsü, Türkiye, EURAMET |
| VNIIFTRI |
Institute of Physical Technical and Radiotechnical Measurements, Rosstandart, Russian Federation, COOMET |
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CCQM-K73.2018
MEASURAND Amount content of H+ in hydrochloric acid solutions
NOMINAL VALUE 0.1 mol/kg
The key comparison reference value xR and its associated standard uncertainty uR are computed user the DerSimonian Laird estimator of the reported results
xR = 0.1001112 mol/kg uR = 0.0000081 mol/kg
The degree of equivalence of laboratory i relative to the key comparison reference value xR is given by a pair of terms, both expressed in mol/kg:
Di = (xi - xR) and its expanded uncertainty Ui at a 95 % level of confidence where Ui = 2 ui.
CCQM-K73.2018
MEASURAND Amount content of H+ in hydrochloric acid solutions
NOMINAL VALUE 0.1 mol/kg
xi measurement value reported by laboratory i, Labi
ui combined standard uncertainy of xi
kLabi coverage factor reported by laboratory i,
ULabi expanded uncertainty of xi at 95 % level of confidence where Ui = kLabiui
| Labi | xi* | ULabi | kLabi |
| mol/kg | mol/kg | ||
| CENAM | 0.1001164 | 0.0000057 | 2.076 |
| CMI | 0.1001031 | 0.0000053 | 2.028 |
| DFM | 0.1001110 | 0.0000032 | 2.000 |
| GUM | 0.100129 | 0.000028 | 2.000 |
| INM | 0.100136 | 0.000173 | 2.366 |
| INMETRO | 0.1001245 | 0.0000569 | 2.072 |
| INTI | 0.10031 | 0.00026 | 2.429 |
| KRISS | 0.1001197 | 0.0000114 | 2.429 |
| LNE | 0.10028 | 0.00031 | 2.366 |
| NIM | 0.100118 | 0.000015 | 2.212 |
| NMIJ | 0.1001267 | 0.0000122 | 2.105 |
| PTB | 0.1001020 | 0.0000083 | 2.019 |
| SMU | 0.1001071 | 0.0000122 | 2.000 |
| UME | 0.100035 | 0.000015 | 2.012 |
| UNIIM | 0.100182 | 0.000038 | 2.869 |
| VNIIFTRI | 0.100187 | 0.000212 | 2.012 |
| * corrected for drift | |||
| Labi | xi** | ULabi | kLabi |
| mol/kg | mol/kg | ||
| CENAM | 0.1001075 | 0.0000142 | 2.140 |
| KRISS | 0.1001197 | 0.0000114 | 2.429 |
| NIM | 0.100116 | 0.000093 | 2.649 |
| PTB | 0.1001171 | 0.0000743 | 2.025 |
| SMU | 0.1001299 | 0.0000345 | 2.000 |
| **result of diluted solution, corrected for drift | |||
