CCQM-K170
MEASURAND Electrolytic conductivity of a KCL solution at 25 °C
NOMINAL VALUE 0.5 S.m-1
Degrees of equivalence represented by Di = (xI - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in S.m-1.
Enlarged graph
CCQM-K170
MEASURAND Electrolytic conductivity of a KCL solution at 25 °C
NOMINAL VALUE 20 S.m-1
Degrees of equivalence represented by Di = (xI - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in S.m-1.
Enlarged graph
CCQM-K170
MEASURAND Electrolytic conductivity of a KCL solution at 25 °C
NOMINAL VALUE 0.5 S.m-1
Degrees of equivalence represented by Di = (xI - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in S.m-1.
LABi | Di | Uneg,i | Upos,i | |
---|---|---|---|---|
S·m-1 |
S·m-1 |
S·m-1 |
||
INTI | -0.02100 | 0.01400 | ||
VNIIFTRI | -0.00131 | 0.00050 | ||
CENAM | -0.00100 | 0.01000 | ||
UME | -0.00110 | 0.00200 | ||
NIMT | -0.00050 | 0.00180 | ||
BFKH | -0.00033 | 0.00070 | ||
NMIJ | -0.00025 | 0.00091 | ||
NIM | -0.00004 | 0.00042 | ||
RISE | 0.00000 | 0.00130 | ||
INM (CO) | 0.00001 | 0.00097 | ||
SMU | 0.00004 | 0.00043 | ||
INACAL | 0.00023 | 0.00097 | ||
CMI | 0.00030 | 0.00100 | ||
LATU | 0.00033 | 0.00084 | ||
KazStandard | 0.00041 | 0.00094 | ||
IBMETRO | 0.00050 | 0.00160 | ||
INMETRO | 0.00075 | 0.00056 |
CCQM-K170
MEASURAND Electrolytic conductivity of a KCL solution at 25 °C
NOMINAL VALUE 20 S.m-1
Degrees of equivalence represented by Di = (xI - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in S.m-1.
LABi | Di | Uneg,i | Upos,i | |
---|---|---|---|---|
S·m-1 |
S·m-1 |
S·m-1 |
||
VNIIM | -0.543 | 0.027 | ||
CENAM | -0.332 | 0.065 | ||
INM(CO) | -0.038 | 0.048 | ||
NIMT | -0.038 | 0.050 | ||
LATU | -0.017 | 0.038 | ||
NIM | -0.009 | 0.028 | ||
RISE | 0.008 | 0.057 | ||
NMIJ | 0.009 | 0.048 | ||
INMETRO | 0.018 | 0.044 | ||
IBMETRO | 0.050 | 0.760 | ||
BFKH | 0.116 | 0.029 | ||
KazStandard | 0.137 | 0.033 |
Metrology area, Sub-field | Chemistry and Biology, Electrochemistry |
Description | Measurement of electrolytic conductivity |
Time of measurements | 2021 |
Status | Approved for equivalence |
Final Reports of the comparisons | |
Measurand | Electrolytic conductivity 0.5 S/m and 20 S/m |
Transfer device | 2 samples of aqueous KCl solutions |
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 repeats the determination of two conductivity level which were previously present in two prior key comparisons: CCQM-K36 and CCQM-K92 |
Pilot institute |
NIM
National Institute of Metrology China |
Contact person | Hai WANG 86 10 6452 4967 |
Pilot laboratory | |
---|---|
NIM |
National Institute of Metrology, China, APMP |
BFKH |
Government Office of the Capital City Budapest, Hungary, EURAMET |
CENAM |
Centro Nacional de Metrologia, Mexico, SIM |
CMI |
Czech Metrology Institute, Czechia, EURAMET |
IBMETRO |
Instituto Boliviano de Metrología, Bolivia, SIM |
INACAL |
National Institute for Quality, Peru, SIM |
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 |
KazStandard |
Kazakhstan Institute of Standardization and Metrology, Kazakhstan, COOMET |
LATU |
Laboratorio Tecnologico del Uruguay, Uruguay, SIM |
NIMT |
National Institute of Metrology (Thailand), Thailand, APMP |
NMIJ AIST |
National Metrology Institute of Japan, Japan, APMP |
RISE |
Research Institutes of Sweden AB, Sweden, EURAMET |
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 |
VNIIM |
D.I. Mendeleyev Institute for Metrology, Rosstandart, Russian Federation, COOMET |
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CCQM-K170
MEASURAND Electrolytic conductivity of a KCL solution at 25 °C
NOMINAL VALUE 0.5 S.m-1
The key comparison reference value xR and its associated standard uncertainty uR are determined from the median of eight results. Secondary measurement results traceable to CRMs from SMU (a participating NMI) and those using non-NMI CRMs as calibrants were excluded. Secondary measurement results traceable to DFM (a non-participating NMI) were first combined into a single result using the uncertainty-weighted mean without dispersion before being included in the xR calculation (see section 8 of the CCQM-K170 Final report).
xR = 0.50150 S.m-1 uR = 0.00018 S.m-1
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 S.m-1:
Di = (xi - xR) and its expanded uncertainty Ui at a 95 % level of confidence calculated as described in section 9 of the CCQM-K170 Final report.
CCQM-K170
MEASURAND Electrolytic conductivity of a KCL solution at 25 °C
NOMINAL VALUE 20 S.m-1
The key comparison reference value xR and its associated standard uncertainty uR are determined from the median of six results. Measurement results for participants who reported technical problems and those using non-NMI CRMs as calibrants were excluded. Secondary measurement results traceable to DFM (a non-participating NMI) were first combined into a single result using the uncertainty-weighted mean without dispersion before being included in the xR calculation (see section 8 of the CCQM-K170 Final report).
xR =20.148 S.m-1 uR = 0.014 S.m-1
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 S.m-1:
Di = (xi - xR) and its expanded uncertainty Ui at a 95 % level of confidence calculated as described in section 9 of the CCQM-K170 Final report.
CCQM-K170
MEASURAND Electrolytic conductivity of a KCL solution at 25 °C
NOMINAL VALUE 0.5 S.m-1
xi measurement value submitted by laboratory i, Labi
ui combined standard uncertainty of xi
Labi | xi | ui | |
S·m-1 | S·m-1 | ||
INTI | 0.4802 | 0.0052 | |
VNIIFTRI | 0.500184 | 0.00020 | |
CENAM | 0.5003 | 0.0051 | |
UME | 0.5004 | 0.0010 | |
NIMT | 0.5010 | 0.00086 | |
BFKH | 0.50116 | 0.000345 | |
NMIJ | 0.50125 | 0.00048 | |
NIM | 0.50146 | 0.000125 | |
RISE | 0.5015 | 0.0006 | |
INM (CO) | 0.50151 | 0.00045 | |
SMU | 0.50153 | 0.00013 | |
INACAL | 0.50172 | 0.00045 | |
CMI | 0.5018 | 0.00055 | |
LATU | 0.50182 | 0.00038 | |
KazStandard | 0.501901279 | 0.000436 | |
IBMETRO | 0.5020 | 0.0008 | |
INMETRO | 0.50225 | 0.00025 |
CQM-K170
MEASURAND Electrolytic conductivity of a KCL solution at 25 °C
NOMINAL VALUE 20 S.m-1
xi measurement value submitted by laboratory i, Labi
ui combined standard uncertainty of xi
Labi | xi | ui | |
S·m-1 | S·m-1 | ||
VNIIM | 19.6049 | 0.0016 | |
CENAM | 19.8159 | 0.0293 | |
INM (CO) | 20.110 | 0.024 | |
NIMT | 20.110 | 0.021 | |
LATU | 20.131 | 0.013 | |
NIM | 20.138 | 0.005 | |
RISE | 20.156 | 0.025 | |
NMIJ | 20.157 | 0.024 | |
INMETRO | 20.166 | 0.021 | |
IBMETRO | 20.1935 | 0.3717 | |
BFKH | 20.2636 | 0.00627 | |
KazStandard | 20.28405 | 0.00912 |