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 = (xixRi) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in mg/kg.

AfB1
Di / (mg/kg)
Participating institutes

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 = (xixRi) 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
Participating institutes
CCQM-K154.b
CCQM-K154.b.1

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.

Comparison
Comparison close
CC comparison
Linked comparison
CCQM-K154.b
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
First Name Last Name
wwww@ww.www +356719836 Institute 1 Institute 1 Khmelnitskiy
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

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, xR, assigned by the BIPM according to the calibration procedure described in the CCQM-K154.b Final report, and its associated combined uncertainty, uR,i  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 iLabi  

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.