CCQM-K73.2018 and CCQM-K73.2018.2
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
Enlarged Graph
CCQM-K73.2018 and CCQM-K73.2018.2
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-1 |
mol·kg-1 |
mol·kg-1 |
||
| CENAM | 0.00001 | 0.00003 | ||
| CMI | -0.00001 | 0.00003 | ||
| DFM | 0.00000 | 0.00003 | ||
| GUM | 0.00002 | 0.00004 | ||
| INM | 0.00003 | 0.00018 | ||
| INMETRO | 0.00001 | 0.00006 | ||
| INTI | 0.00020 | 0.00027 | ||
| KRISS | 0.00001 | 0.00003 | ||
| LNE | 0.00017 | 0.00031 | ||
| NIM | 0.00001 | 0.00003 | ||
| NMIJ | 0.00002 | 0.00003 | ||
| PTB | -0.00001 | 0.00003 | ||
| SMU | 0.00000 | 0.00003 | ||
| UME | -0.00008 | 0.00004 | ||
| UNIIM | 0.00007 | 0.00005 | ||
| VNIIFTRI | 0.00008 | 0.00022 | ||
| CENAM additional | 0.00000 | 0.00004 | ||
| KRISS additional | 0.00001 | 0.00003 | ||
| NIM additional | 0.00001 | 0.00010 | ||
| PTB additional | 0.00001 | 0.00008 | ||
| SMU additional | 0.00002 | 0.00005 | ||
| SE"Ukrmetrteststandard" | -0.00005 | 0.00013 | ||
| INMETRO | 0.00532 | 0.00003 | ||
| INMETRO additional | 0.00166 | 0.00012 |
| 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 and CCQM-K73.2018.2
MEASURAND Amount content of H+ in hydrochloric acid solutions
NOMINAL VALUE 0.1 mol/kg
CCQM-K73.2018
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.
Linking CCQM-K73.2018.2 to CCQM-K73.2018
SMU provides the link between the key comparison CCQM-K73.2018.2 and CCQM-K73.2018, having participated in both comparisons. The linking process is described in page 8 and 9 of the CCQM-K73.2018.2 Final report.
CCQM-K73.2018 and CCQM-K73.2018.2
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
CCQM-K73.2018
| Labi | xi* | ULabi | kLabi | |
| mol/kg | mol/kg | |||
| CENAM | 0.1001164 | 0.0000057 | 2.076 | |
| CMI | 0.1001031 | 0.0000053 | 2.028 | |
| DFM | 0.100111 | 0.0000032 | 2.000 | |
| GUM | 0.1001287 | 0.0000282 | 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 | 0.100102 | 0.0000083 | 2.019 | |
| SMU | 0.1001071 | 0.0000122 | 2.000 | |
| TUBITAK UME | 0.100035 | 0.000015 | 2.012 | |
| UNIIM | 0.100182 | 0.000038 | 2.869 | |
| VNIIFTRI | 0.100187 | 0.000212 | 2.012 |
* corrected for drift
CCQM-K73.2018 Diluted HCl
| 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
CCQM-K73.2018.2
| Labi | xi* | ULabi | kLabi | |
| mol/kg | mol/kg | |||
| SMU | 0.100454667 | 0.000008 | 2.000 | |
| SE"Ukrmetrteststandard" | 0.100410418 | 0.00015 | 2.320 | |
| INMETRO | 0.10577854 | 0.000013 | 2.520 |
* corrected for drift
CCQM-K73.2018.2 Diluted HCl
| Labi | xi** | ULabi | kLabi | |
| mol/kg | mol/kg | |||
| INMETRO | 0.102117 | 0.000140 | 2.43 |
**result of diluted solution, corrected for drift
