Comparison
Comparison close
Results

BIPM.RI(II)-K1.Co-57 and CCRI(II)-S6.Co-57

MEASURAND   SIR equivalent activity of Co-57

 

Degrees of equivalence represented by Di = (xI - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in MBq.

Co-57
Di / MBq
Participating institutes

Results given in absolute values.

 

 

BIPM.RI(II)-K1.Co-57 and CCRI(II)-S6.Co-57

MEASURAND   SIR equivalent activity of Co-57

 

Degrees of equivalence represented by Di = (xI - xR) / xand its expanded uncertainty Ui at a 95 % level of confidence, both expressed in kBq/MBq.

Co-57
Di / (kBq/MBq)
Participating institutes

Results given in relative values.

 

 

Comparison
Comparison close
Results

BIPM.RI(II)-K1.Co-57 and CCRI(II)-S6.Co-57

MEASURAND   SIR equivalent activity of Co-57

 

Degrees of equivalence represented by Di = (xI - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in MBq.

LABi Di Uneg,i Upos,i
MBq
MBq
MBq
PTB 0.4 1.1
NMIJ -0.5 1.1
LNE-LNHB -0.42 0.93
NIST -0.1 1.2
POLATOM 1.2 1.5
NMISA 1.65 0.96
CMI -0.4 1.7
BARC 3.6 1.3
IFIN-HH 0.2 2.6
LNMRI/IRD 3.5 1.3
Participating institutes
BIPM.RI(II)-K1.Co-57
CCRI(II)-S6.Co-57

Results given in absolute values.

 

 

 

 

BIPM.RI(II)-K1.Co-57 and CCRI(II)-S6.Co-57

MEASURAND   SIR equivalent activity of Co-57

 

Degrees of equivalence represented by Di = (xI - xR) / xand its expanded uncertainty Ui at a 95 % level of confidence, both expressed in kBq/MBq.

LABi Di Uneg,i Upos,i
kBq/MBq
kBq/MBq
kBq/MBq
PTB 2.5 6.8
NMIJ -3.0 6.5
LNE-LNHB -2.5 5.5
NIST -0.4 7.3
POLATOM 7.0 8.6
NMISA 9.8 5.7
CMI -2 10
BARC 21.1 7.7
IFIN-HH 1 16
LNMRI/IRD 20.8 7.7
Participating institutes
BIPM.RI(II)-K1.Co-57
CCRI(II)-S6.Co-57

Results given in relative values.

 

 

 

Comparison
Comparison close
BIPM comparison
Linked comparison
CCRI(II)-S6.Co-57
Metrology area, Sub-field Ionizing Radiation, Section II (Measurement of Radionuclides)
Description Measurement of radioactivity content of same solution
Time of measurements 2008
Status Approved
Final Reports of the comparisons
References

CCRI(II)-S6.Co-57 Technical Protocol

Measurand Activity per unit mass (Radionuclide: Co-57)
Transfer device Aliquots of stock solution distributed to participants through third-party supplier
Comparison type Supplementary Comparison
Consultative Committee CCRI (Consultative Committee for Ionizing Radiation)
Conducted by CCRI (Consultative Committee for Ionizing Radiation)
Comments
 
Pilot institute IAEA
International Atomic Energy Agency
IAEA - International Organization
Contact person S. Palm

First Name Last Name
wwww@ww.www +356719836 Institute 1 Institute 1 Khmelnitskiy
Pilot laboratory
IAEA

International Atomic Energy Agency, IAEA - International Organization, EURAMET

AUFM

Ankara University Faculty of Medicine, Department of Nuclear Medicine, Türkiye, EURAMET

BARC

Bhabha Atomic Research Centre, India, APMP

CMI-IIR

Czech Metrology Institute - Inspectorate for Ionizing Radiation, Czechia, EURAMET

IFIN-HH

"Horia Hulubei" National Institute of Research and Development for Physics and Nuclear Engineering, Romania, EURAMET

LNMRI

Laboratorio Nacional de Metrologia das Radiaçoes Ionizantes, IRD, Brazil, SIM

NIST

National Institute of Standards and Technology, United States, SIM

Comparison
Comparison close
Results

BIPM.RI(II)-K1.Co-57 and CCRI(II)-S6.Co-57

MEASURAND   SIR equivalent activity of Co-57

 

The key comparison reference value xR for this radionuclide is estimated to be

 

xR = 168.99 MBq with a standard uncertainty uR = 0.25 MBq

 

Degrees of equivalence represented by Di = (xI - xR) and its expanded uncertainty Ui at a 95 % level of confidence are both expressed in MBq, where xi is the equivalent activity for laboratory i.

The Degrees of equivalence are also given in relative terms by Di = (xI - xR) /xand its expanded uncertainty Ui at a 95 % level of confidence, both expressed in kBq/MBq.

Comparison
Comparison close
Results

BIPM.RI(II)-K1.Co-57 and CCRI(II)-S6.Co-57

MEASURAND   SIR equivalent activity of Co-57

 

xi  measurement value submitted by laboratory iLabi

ui   combined standard uncertainty of xi

 

BIPM.RI(II)-K1.Co-57

         
  Labi xi u(xi) Date of measurement
  MBq MBq
  PTB 169.42 0.56 2005-03-31
  NMIJ 168.48 0.53 2006-09-19
  LNE-LNHB 168.57 0.43 2007-06-20
  NIST 168.92 0.61 2010-05-21
  POLATOM 170.18 0.73 2013-11-19
  NMISA 170.64 0.45 2015-09-15
  CMI 168.62 0.85 2021-12-10
         

 

CCRI(II)-S6.Co-57

         
  Labi xi u(xi) Date of measurement
  MBq MBq
  BARC 172.55 0.60 2008
  IFIN-HH 169.2 1.3 2008
  LNMRI/IRD 172.50 0.60 2008