CCQM-K146 and CCQM-K146.1
MEASURAND Benzo[a]pyrene in olive oil
Degrees of equivalence represented by Di = (xI - xR)/xR and its expanded uncertainty Ui /xR at a 95 % level of confidence, both expressed in %.
MIRS/ZRS-KP/LPO also known as Institute for Oliveculture.
CCQM-K146
MEASURAND Benzo[a]pyrene in olive oil
NOMINAL VALUE 2.7 µg/kg
Degrees of equivalence represented by Di = (xI - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in µg/kg.
MIRS/ZRS-KP/LPO also known as Institute for Oliveculture.
Note: The degrees of equivalence for the laboratories participants in CCQM-K146.1 are given in relative terms only.
CCQM-K146 and CCQM-K146.1
MEASURAND Benzo[a]pyrene in olive oil
Degrees of equivalence represented by Di = (xI - xR)/xR and its expanded uncertainty Ui /xRat a 95 % level of confidence, both expressed in %.
| LABi | Di | Uneg,i | Upos,i | |
|---|---|---|---|---|
% |
% |
% |
||
| BAM | -3.6 | 6.9 | ||
| BVL | -4.7 | 16.4 | ||
| DRICM | -29.6 | 4.7 | ||
| EXHM/GCSL-EIM | -29.6 | 12.4 | ||
| GL | -0.7 | 6.2 | ||
| HSA | -1.1 | 6.6 | ||
| INMETRO | -35.0 | 12.4 | ||
| KRISS | 2.2 | 4.4 | ||
| LGC | -1.1 | 5.8 | ||
| NIM | -1.1 | 8.8 | ||
| NIMT | -25.2 | 8.4 | ||
| NIST | -0.4 | 12.4 | ||
| NMIJ | 1.8 | 5.8 | ||
| MIRS/ZRS-KP/LPO | 27.7 | 54.7 | ||
| UME | 12.8 | 10.6 | ||
| VNIIM | -3.6 | 7.7 | ||
| EXHM/GCSL-EIM | 10.9 | 8.4 | ||
| NMISA | 1.3 | 13.8 | ||
| MIRS/ZRS-KP/LPO | -17.3 | 17 | ||
| UME | -12.7 | 8.3 |
MIRS/ZRS-KP/LPO also known as Institute for Oliveculture.
CCQM-K146
MEASURAND Benzo[a]pyrene in olive oil
NOMINAL VALUE 2.7 µg/kg
Degrees of equivalence represented by Di = (xI - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in µg/kg.
| LABi | Di | Uneg,i | Upos,i | |
|---|---|---|---|---|
µg/kg |
µg/kg |
µg/kg |
||
| BAM | -0.10 | 0.19 | ||
| BVL | -0.13 | 0.45 | ||
| DRICM | -0.81 | 0.13 | ||
| EXHM/GCSL-EIM | -0.81 | 0.34 | ||
| GL | -0.02 | 0.17 | ||
| HAS | -0.03 | 0.18 | ||
| INMETRO | -0.96 | 0.34 | ||
| KRISS | 0.06 | 0.12 | ||
| LGC | -0.03 | 0.16 | ||
| NIM | -0.03 | 0.24 | ||
| NIMT | -0.69 | 0.23 | ||
| NIST | -0.01 | 0.34 | ||
| NMIJ | 0.05 | 0.16 | ||
| MIRS/ZRS-KP/LPO | 0.76 | 1.50 | ||
| UME | 0.35 | 0.29 | ||
| VNIIM | -0.10 | 0.21 |
MIRS/ZRS-KP/LPO also known as Institute for Oliveculture.
Note: The degrees of equivalence for the laboratories participants in CCQM-K146.1 are given in relative terms only.
| Metrology area, Sub-field | Chemistry and Biology, Organics |
| Description | Benzo[a]pyrene in olive oil Low-polarity analyte in high fat food |
| Time of measurements | 2017 - 2020 |
| Status | Approved for equivalence |
| Final Reports of the comparisons | |
| Measurand | Mass fraction of Benzo[a]pyrene in olive oil in µg/kg |
| Parameters | High fat, low protein, low carbohydrate food matrix |
| Transfer device | Matrix materials available at NIM (China) |
| Comparison type | Key Comparison |
| Consultative Committee | CCQM (Consultative Committee for Amount of Substance) |
| Conducted by | CCQM (Consultative Committee for Amount of Substance) |
| Comments | This Track A key comparison directly illustrates the capabilities in determining mass fraction of organic compounds, with molecular mass of 100 g/mol to 500 g/mol, having low polarity pKow < -2, in mass fraction range from 0.1 µg/kg to 1000 µg/kg in a high fat, low protein, low carbohydrate food matrix. |
| Pilot institute |
NIM
National Institute of Metrology China |
| Contact person | Xiaomin LI |
| Pilot laboratory | |
|---|---|
| NIM |
National Institute of Metrology, China, APMP |
| BAM |
Bundesanstalt für Materialforschung und -prüfung, Germany, EURAMET |
| BVL |
Bundesamt für Verbraucherschutz und Lebensmittelsicherheit, Germany, EURAMET |
| DRICM |
Designated Reference Institute for Chemical Measurements, Bangladesh, APMP |
| 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 |
| MIRS/ZRS-KP/LPO |
MIRS/Science and Research Centre / Institute for Oliveculture / Laboratory for oil testing, Slovenia, EURAMET |
| NIMT |
National Institute of Metrology (Thailand), Thailand, APMP |
| NIST |
National Institute of Standards and Technology, United States, SIM |
| NMIJ AIST |
National Metrology Institute of Japan, Japan, APMP |
| UME |
TÜBITAK Ulusal Metroloji Enstitüsü, Türkiye, EURAMET |
| VNIIM |
D.I. Mendeleyev Institute for Metrology, Rosstandart, Russian Federation, COOMET |
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CCQM-K146
MEASURAND Benzo[a]pyrene in olive oil
NOMINAL VALUE 2.7 µg/kg
The key comparison reference value xR and its associated standard uncertainty uR are computed from a hierarchical Bayesian procedure implemented in the NIST Consensus Builder (NICOB), considered the most appropriate approach (see CCQM-K146 Final Report p. 23). The institutes DRICM, EXHM, INMETRO, NIMT, MIRS/ZRS-KP/LPO and UME were excluded when determining the key comparison reference value.
xR = 2.74 µg/kg uR = 0.03 µg/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 µg/kg:
Di = (xi - xR) and its expanded uncertainty Ui at a 95 % level of confidence where Ui = 2 ui.
The degree of equivalence of laboratory i relative to the key comparison reference value xR is also alternatively given by a pair of terms, both expressed in %:
Di = (xi - xR)/xR and its associated expanded uncertainty Ui /xR at a 95 % level of confidence.
Linking CCQM-K146.1 to CCQM-K146
The NIM provides the link between the key comparison CCQM-K146.1 to CCQM-K146, having participated in both comparisons. The linking process is described on page 14 of the CCQM146.1 Final Report , and the degrees of equivalence for the laboratories participants in CCQM-K146.1 are given in relative terms only.
CCQM-K146
MEASURAND Benzo[a]pyrene in olive oil
NOMINAL VALUE 2.7 µg/kg
The key comparison reference value xR and its associated standard uncertainty uR are computed from a hierarchical Bayesian procedure implemented in the NIST Consensus Builder (NICOB), considered the most appropriate approach (see CCQM-K146 Final Report p. 23). The institutes DRICM, EXHM, INMETRO, NIMT, MIRS/ZRS-KP/LPO and UME were excluded when determining the key comparison reference value.
xR = 2.74 µg/kg uR = 0.03 µg/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 µg/kg:
Di = (xi - xR) and its expanded uncertainty Ui at a 95 % level of confidence where Ui = 2 ui.
The degree of equivalence of laboratory i relative to the key comparison reference value xR is also alternatively given by a pair of terms, both expressed in %:
Di = (xi - xR)/xR and its associated expanded uncertainty Ui at a 95 % level of confidence.
Linking CCQM-K146.1 to CCQM-K146
The NIM provides the link between the key comparison CCQM-K146.1 to CCQM-K146, having participated in both comparisons. The linking process is described on page 14 of the CCQM146.1 Final Report , and the degrees of equivalence for the laboratories participants in CCQM-K146.1 are given in relative terms only.
CCQM-K146
MEASURAND Benzo[a]pyrene in olive oil
NOMINAL VALUE 2.7 µg/kg
xi measured mass fraction reported by laboratory i, Labi
ui combined standard uncertainty of xi
ki coverage factor reported by laboratory i,
Ui expanded uncertainty of xi at 95 % level of confidence where Ui = kiui
MIRS/ZRS-KP/LPO also known as Institute for Oliveculture.
CCQM-K146.1
The measurement results are listed in Table 9 of the CCQM-K146.1 Final Report.
CCQM-K146
MEASURAND Benzo[a]pyrene in olive oil
NOMINAL VALUE 2.7 µg/kg
xi measured mass fraction reported by laboratory i, Labi
ui combined standard uncertainty of xi
ki coverage factor reported by laboratory i,
Ui expanded uncertainty of xi at 95 % level of confidence where Ui = kiui
MIRS/ZRS-KP/LPO also known as Institute for Oliveculture.
CCQM-K146.1
The measurement results are listed in Table 9 of the CCQM-K146.1 Final Report.
