CCQM-K154.b and CCQM-K154.b.1
MEASURAND Mass fraction of Aflatoxin B1 (AfB1) in solution acetonitrile (ACN)
NOMINAL RANGE 2 mg/kg to 50 mg/kg
Degrees of equivalence represented by Di = (xi- xRi) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in mg/kg.
The samples are indicated by A and B.
(CBKT) – sample provided by the laboratory is prepared using a value assigned stock solution of AfB1 in ACN supplied within the "Metrology for Safe Food and Feed in Developing Economies" Capacity Building Programme;
(own) – sample provided by the laboratory is prepared based on the laboratory’s own characterized source material.
CCQM-K154.b and CCQM-K154.b.1
MEASURAND Mass fraction of Aflatoxin B1 (AfB1) in solution acetonitrile (ACN)
NOMINAL RANGE 2 mg/kg to 50 mg/kg
Degrees of equivalence represented by Di = (xi- xRi) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in mg/kg.
| LABi | Di | Uneg,i | Upos,i | |
|---|---|---|---|---|
mg/kg |
mg/kg |
mg/kg |
||
| NIM (own) A | 0.09 | 0.16 | ||
| NIM (own) B | 0.12 | 0.22 | ||
| NIM (CBKT) A | 0.04 | 0.20 | ||
| NIM (CBKT) B | 0.05 | 0.24 | ||
| NMISA (own) A | 0.18 | 0.82 | ||
| NMISA (own) B | 0.12 | 0.79 | ||
| INM (CBKT) A | 0.04 | 0.14 | ||
| INM (CBKT) B | 0.05 | 0.15 | ||
| INRAP (CBKT) A | 1.33 | 0.14 | ||
| INRAP (CBKT) B | 2.19 | 0.14 | ||
| NIMT (CBKT) A | 0.03 | 0.07 | ||
| NIMT (CBKT) B | 0.03 | 0.07 | ||
| UME (CBKT) A | 0.05 | 0.17 | ||
| UME (CBKT) B | 0.02 | 0.17 | ||
| EXHM (own) A | 0.17 | 0.32 | ||
| EXHM (own) B | 0.14 | 0.32 | ||
| INMETRO (CBKT) A | 0.04 | 0.33 | ||
| INMETRO (CBKT) B | 0.04 | 0.33 | ||
| INTI (CBKT) A | 0.02 | 0.42 | ||
| INTI (CBKT) B | 0.06 | 0.41 | ||
| KEBS (CBKT) A | 0.01 | 0.28 | ||
| KEBS (CBKT) B | 0.08 | 0.29 | ||
| LATU (CBKT) A | 0.10 | 0.37 | ||
| LATU (CBKT) B | -0.30 | 0.38 | ||
| INRAP (CBKT) A | -0.03 | 0.19 | ||
| INRAP (CBKT) B | 0.08 | 0.12 |
The samples are indicated by A and B.
(CBKT) – sample provided by the laboratory is prepared using a value assigned stock solution of AfB1 in ACN supplied within the "Metrology for Safe Food and Feed in Developing Economies" Capacity Building Programme;
(own) – sample provided by the laboratory is prepared based on the laboratory’s own characterized source material.
| Metrology area, Sub-field | Chemistry and Biology, Organics |
| Description | Aflatoxin B1 (AfB1) in acetonitrile (ACN) |
| Time of measurements | 2020 - 2021 |
| Status | Approved for equivalence |
| Final Reports of the comparisons | |
| Measurand | Mass fraction mg/kg |
| Comparison type | Key Comparison |
| Consultative Committee | CCQM (Consultative Committee for Amount of Substance) |
| Conducted by | CCQM (Consultative Committee for Amount of Substance) |
| Comments | Gravimetric preparation and value assignment of aflatoxin B1 (AfB1) in acetonitrile (ACN). |
| Pilot institute |
BIPM
Bureau International des Poids et Mesures BIPM - International Organization |
| Contact person | R. Josephs +33 (0) 1 45 07 70 55 |
| Pilot laboratory | |
|---|---|
| BIPM |
Bureau International des Poids et Mesures, BIPM - International Organization, N/A |
| EXHM/GCSL-EIM |
National Laboratory of Chemical Metrology/GCSL - Hellenic Institute of Metrology, Greece, EURAMET |
| INM (CO) |
Instituto Nacional de Metrología de Colombia, Colombia, SIM |
| INMETRO |
Instituto Nacional de Metrologia, Qualidade e Tecnologia, Brazil, SIM |
| INRAP |
Institut National de Recherche et d'Analyse Physico-Chimique, Tunisia, AFRIMETS |
| INTI |
Instituto Nacional de Tecnologia Industrial, Argentina, SIM |
| KEBS |
Kenya Bureau of Standards, Kenya, AFRIMETS |
| LATU |
Laboratorio Tecnologico del Uruguay, Uruguay, SIM |
| NIM |
National Institute of Metrology, China, APMP |
| NIMT |
National Institute of Metrology (Thailand), Thailand, APMP |
| NMISA |
National Metrology Institute of South Africa, South Africa, AFRIMETS |
| UME |
TÜBITAK Ulusal Metroloji Enstitüsü, Türkiye, EURAMET |
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CCQM-K154.b and CCQM-K154.b.1
MEASURAND Mass fraction of Aflatoxin B1 (AfB1) in solution acetonitrile (ACN)
NOMINAL RANGE 2 mg/kg to 50 mg/kg
For each sample preparation, the value of the AfB1 mass fraction, xRi, assigned by the BIPM according to the calibration procedure described in the CCQM-K154.b Final report, and its associated combined uncertainty, uRi, is taken as the key comparison reference value for laboratory i.
| CCQM-K154.b | ||
| Labi | xR,i | uR,i |
| mg/kg | mg/kg | |
| NIM (own) A | 6.354 | 0.046 |
| NIM (own) B | 6.316 | 0.091 |
| NIM (CBKT) A | 6.405 | 0.060 |
| NIM (CBKT) B | 6.339 | 0.091 |
| NMISA (own) A | 31.51 | 0.16 |
| NMISA (own) B | 31.57 | 0.11 |
| INM (CBKT) A | 3.950 | 0.051 |
| INM (CBKT) B | 3.937 | 0.058 |
| INRAP (CBKT) A | 4.819 | 0.050 |
| INRAP (CBKT) B | 3.963 | 0.046 |
| NIMT (CBKT) A | 2.018 | 0.022 |
| NIMT (CBKT) B | 2.025 | 0.022 |
| UME (CBKT) A | 5.057 | 0.045 |
| UME (CBKT) B | 5.090 | 0.045 |
| EXHM (own) A | 9.882 | 0.071 |
| EXHM (own) B | 9.907 | 0.069 |
| INMETRO (CBKT) A | 8.205 | 0.053 |
| INMETRO (CBKT) B | 8.205 | 0.053 |
| INTI (CBKT) A | 14.989 | 0.149 |
| INTI (CBKT) B | 14.951 | 0.141 |
| KEBS (CBKT) A | 12.188 | 0.099 |
| KEBS (CBKT) B | 12.117 | 0.103 |
| LATU (CBKT) A | 14.758 | 0.138 |
| LATU (CBKT) B | 15.156 | 0.143 |
| CCQM-K154.b.1 | ||
| Labi | xR,i | uR,i |
| mg/kg | mg/kg | |
| INRAP (CBKT) A | 3.538 | 0.091 |
| INRAP (CBKT) B | 3.432 | 0.051 |
For each sample, the degree of equivalence of each laboratory i with respect to the reference value is given by a pair of terms both expressed in mg/kg:
Di = (xi - xRi ) and Ui, its expanded uncertainty at a 95% level of confidence, Ui = 2(ui 2 + uRi 2)1/2
Linking CCQM-K154.b.1to CCQM-K154.b
The linking process is described in the CCQM-K154.b.1 Final Report
CCQM-K154.b and CCQM-K154.b.1
MEASURAND Mass fraction of Aflatoxin B1 (AfB1) in solution acetonitrile (ACN)
NOMINAL RANGE 2 mg/kg to 50 mg/kg
xi measurement value submitted by laboratory i, Labi
ui combined standard uncertainty of xi
| CCQM-K154.b | ||
| Labi | xi | ui |
| mg/kg | mg/kg | |
| NIM (own) A | 6.44 | 0.062 |
| NIM (own) B | 6.44 | 0.062 |
| NIM (CBKT) A | 6.45 | 0.080 |
| NIM (CBKT) B | 6.45 | 0.080 |
| NMISA (own) A | 31.69 | 0.38 |
| NMISA (own) B | 31.69 | 0.38 |
| INM (CBKT) A | 3.99 | 0.050 |
| INM (CBKT) B | 3.99 | 0.050 |
| INRAP (CBKT) A | 6.15 | 0.05 |
| INRAP (CBKT) B | 6.15 | 0.05 |
| NIMT (CBKT) A | 2.053 | 0.029 |
| NIMT (CBKT) B | 2.053 | 0.029 |
| UME (CBKT) A | 5.11 | 0.07 |
| UME (CBKT) B | 5.11 | 0.07 |
| EXHM (own) A | 10.052 | 0.143 |
| EXHM (own) B | 10.052 | 0.143 |
| INMETRO (CBKT) A | 8.24 | 0.15 |
| INMETRO (CBKT) B | 8.24 | 0.15 |
| INTI (CBKT) A | 15.006 | 0.148 |
| INTI (CBKT) B | 15.006 | 0.148 |
| KEBS (CBKT) A | 12.20 | 0.10 |
| KEBS (CBKT) B | 12.20 | 0.10 |
| LATU (CBKT) A | 14.861 | 0.127 |
| LATU (CBKT) B | 14.861 | 0.127 |
| CCQM-K154.b.1 | ||
| Labi | xi | ui |
| mg/kg | mg/kg | |
| INRAP (CBKT) A | 3.5106 | 0.0335 |
| INRAP (CBKT) B | 3.5106 | 0.0335 |
The samples are indicated by A and B.
(CBKT) – sample provided by the laboratory is prepared using a value assigned stock solution of AfB1 in ACN supplied within the "Metrology for Safe Food and Feed in Developing Economies" Capacity Building Programme;
(own) – sample provided by the laboratory is prepared based on the laboratory’s own characterized source material.
