MEASURAND Mass fraction content of Bisphenol A in the CCQM-K148.a comparison material
Degrees of equivalence represented by Di = (xI - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in mg/g
MEASURAND Mass fraction content of Bisphenol A in the CCQM-K148.a comparison material
Degrees of equivalence represented by Di = (xI - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in mg/g
| LABi | Di | Uneg,i | Upos,i | |
|---|---|---|---|---|
mg/g |
mg/g |
mg/g |
||
| BAM | -0.2 | 1.5 | ||
| BIPM | -2.3 | 3.6 | ||
| CENAM | -18.6 | 1.1 | ||
| EXHM/GCSL-EIM | -1.4 | 1.6 | ||
| GL | 0.7 | 1.6 | ||
| HSA | -0.4 | 3.1 | ||
| INMETRO | 0.1 | 1.7 | ||
| KRISS | 0.3 | 1.9 | ||
| LGC | 0.2 | 1.9 | ||
| NIM | 0.8 | 1.8 | ||
| NIMT | -7.8 | 5.6 | ||
| NMIA | 1.4 | 1.6 | ||
| NMIJ | 0.5 | 1.7 | ||
| NMISA | -6.0 | 8.1 | ||
| NRC | -1.9 | 1.8 | ||
| UME | 1.0 | 1.8 | ||
| VNIIM | 2.1 | 1.1 |
| Metrology area, Sub-field | Chemistry and Biology, Organics |
| Description | Mass fraction assignment of Bisphenol-A high purity material |
| Time of measurements | 2018 - 2019 |
| Status | Approved for equivalence |
| Final Reports of the comparisons | |
| References | |
| Measurand | Mass fraction in mg/g of Bisphenol-A in a sample. Nominal value to be in excess of 950 mg/g. Optional: Mass fraction content of impurity content |
| Transfer device | Crimp-sealed amber glass vial containing 500 mg of the CCQM-K148.a comparison material as a crystalline powder. |
| Comparison type | Key Comparison |
| Consultative Committee | CCQM (Consultative Committee for Amount of Substance) |
| Conducted by | CCQM (Consultative Committee for Amount of Substance) |
| Pilot institute |
BIPM
Bureau International des Poids et Mesures BIPM - International Organization |
| Contact person | Steven Westwood +33 (0) 1 45 07 70 57 |
| Pilot laboratory | |
|---|---|
| BIPM |
Bureau International des Poids et Mesures, BIPM - International Organization, N/A |
| BAM |
Bundesanstalt für Materialforschung und -prüfung, Germany, EURAMET |
| CENAM |
Centro Nacional de Metrologia, Mexico, SIM |
| EXHM/GCSL-EIM |
National Laboratory of Chemical Metrology/GCSL - Hellenic Institute of Metrology, Greece, EURAMET |
| GL |
Government Laboratory, Hong Kong, China, APMP |
| HSA |
Health Science Authority, Singapore, APMP |
| INMETRO |
Instituto Nacional de Metrologia, Qualidade e Tecnologia, Brazil, SIM |
| KRISS |
Korea Research Institute of Standards and Science, Korea, Republic of, APMP |
| LGC |
Laboratory of the Government Chemist, United Kingdom, EURAMET |
| NIM |
National Institute of Metrology, China, APMP |
| NIMT |
National Institute of Metrology (Thailand), Thailand, APMP |
| NMIA |
National Measurement Institute, Australia, Australia, APMP |
| NMISA |
National Metrology Institute of South Africa, South Africa, AFRIMETS |
| NRC |
National Research Council, Canada, SIM |
| UME |
TÜBITAK Ulusal Metroloji Enstitüsü, Türkiye, EURAMET |
| VNIIM |
D.I. Mendeleyev Institute for Metrology, Rosstandart, Russian Federation, COOMET |
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MEASURAND Mass fraction content of Bisphenol A in the CCQM-K148.a comparison material
The key comparison reference value xR and its associated standard uncertainty uR is obtained from a Hierarchical Bayes Random Effects Model (HB REM) estimator which was calculated using as input the twelve participant results after excluding those of BIPM, CENAM, NMISA, NIMT and VNIIM.
xR = 995.6 mg/g uR = 0.3 mg/g
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 mg/g:
Di = (xi - xR) and its expanded uncertainty Ui at a 95 % level of confidence where Ui = 2 ui.
MEASURAND Mass fraction content of Bisphenol A in the CCQM-K148.a comparison material
xi measurement result reported by laboratory i, Labi
ui combined standard uncertainty of xi
| Labi | xi | ui |
| mg/g | mg/g | |
| BAM | 995.4 | 0.46 |
| BIPM | 993.3 | 1.7 |
| CENAM | 977.02 | 0.26 |
| EXHM/GCSL-EIM | 994.23 | 0.64 |
| GL | 996.3 | 2.5 |
| HSA | 995.2 | 1.5 |
| INMETRO | 995.7 | 0.6 |
| KRISS | 995.87 | 0.82 |
| LGC | 995.8 | 1.2 |
| NIM | 996.41 | 1.08 |
| NIMT | 987.8 | 2.76 |
| NMIA | 997.0 | 0.9 |
| NMIJ | 996.1 | 0.50 |
| NMISA | 989.6 | 4.0 |
| NRC | 993.7 | 2.4 |
| UME | 996.64 | 3.08 |
| VNIIM | 997.75 | 0.146 |
