Comparison
Comparison close
Results

BIPM.RI(II)-K1.F-18 and BIPM.RI(II)-K4.F-18

 

MEASURAND           Equivalent activity of F-18

 

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

F-18
Di / MBq
Participating institutes

Results given in absolute values

MEASURAND           Equivalent activity of F-18

 

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

F-18
Di / (kBq/MBq)
Participating institutes

Results given in relative values

Comparison
Comparison close
Results

BIPM.RI(II)-K1.F-18 and BIPM.RI(II)-K4.F-18

 

MEASURAND           Equivalent activity of F-18

 

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
BEV 0.09 0.32
CIEMAT -0.08 0.19
PTB 0.019 0.094
LNE-LNHB -0.09 0.12
VNIIM -0.10 0.19
NPL 0.01 0.11
ENEA-INMRI 0.071 0.092
NMISA 0.03 0.19
NIST -0.01 0.12
POLATOM 0.03 0.17
NRC 0.03 0.11
Participating institutes
BIPM.RI(II)-K1.F-18
BIPM.RI(II)-K4.F-18

Results given in absolute values

MEASURAND           Equivalent activity of F-18

 

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

LABi Di Uneg,i Upos,i
kBq/MBq
kBq/MBq
kBq/MBq
BEV 6 21
CIEMAT -5 12
PTB 1.2 6.1
LNE-LNHB -6.2 7.7
VNIIM -7 12
NPL 0.9 7.2
ENEA-INMRI 4.6 6.0
NMISA 2 12
NIST -0.4 8.0
POLATOM 2 11
NRC 2.3 6.9
Participating institutes
BIPM.RI(II)-K1.F-18
BIPM.RI(II)-K4.F-18

Results given in relative values

Comparison
Comparison close
BIPM comparison
Linked comparison
BIPM.RI(II)-K1.F-18
Metrology area, Sub-field Ionizing Radiation, Section II (Measurement of Radionuclides)
Description Activity of radionuclide F-18
Time of measurements 2001 -
Status Continuous, approved for equivalence
Final Reports of the comparisons
Measurand SIR equivalent activity
Transfer device Radioactive solution
Comparison type Key Comparison
Consultative Committee CCRI (Consultative Committee for Ionizing Radiation)
Conducted by BIPM (Bureau International des Poids et Mesures)
Comments SIR: Système International de Référence, International Reference System
BIPM.RI(II)-K4.F-18 results are linked to those of BIPM.RI(II)-K1.F-18.
Last update: 25 January 2023
The first results of BIPM.RI(II)-K1.F-18 were published in February 2003 and has since then successively been updated.
The first results of BIPM.RI(II)-K4.F-18 were published in January 2016 and has since then successively been updated.
SIR equivalent activity of the radionuclide 18F
Pilot institute BIPM
Bureau International des Poids et Mesures
BIPM - International Organization
Contact person Carine Michotte

+33 (0) 1 45 07 70 85
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

BEV

Bundesamt für Eich- und Vermessungswesen, Austria, EURAMET

CIEMAT

Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas, Spain, EURAMET

IRA

Institut Universitaire de Radiophysique Appliquée, Switzerland, EURAMET

LNE-LNHB

Commissariat à l'énergie atomique / Laboratoire National Henri Becquerel, France, EURAMET

NPL

National Physical Laboratory, United Kingdom, EURAMET

PTB

Physikalisch-Technische Bundesanstalt, Germany, EURAMET

Comparison
Comparison close
Results

BIPM.RI(II)-K1.F-18 and BIPM.RI(II)-K4.F-18

MEASURAND           Equivalent activity of F-18

 

Key comparison reference value: the SIR key comparison reference value xR for this radionuclide is  xR = 15 297 kBq with a standard uncertainty uR = 18 kBq

(see Section 7 of the BIPM.RI(I)-K4.F-18 Final Report).  The value xi is taken as the equivalent activity for a laboratory i.

 

The degree of equivalence of each laboratory i with respect to the reference value is given by a pair of terms:

Di = (x- xR) and Uits expanded uncertainty (k = 2), both expressed in MBq, and

Ui = 2((1 - 2wi)ui2 + u2R)1/2, where wi is the weight of laboratory i contributing to the calculation of xR.

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

 

Linking BIPM.RI(II)-K4.F-18 to BIPM.RI(II)-K1.F-18

The value xi is the SIRTI equivalent activity for laboratory i participant in BIPM.RI(II)-K4.F-18 multiplied by the linking factor to BIPM.RI(II)-K1.F-18.

The degree of equivalence of laboratory i participant in BIPM.RI(II)-K4.F-18 with respect to the reference value is given by a pair of terms:
Di = (xi - xR) and Ui, its expanded uncertainty (k = 2), both expressed in MBq. The approximation Ui = 2(ui2 + uR2)1/2 is used in the following table
.

These statements make it possible to extend the BIPM.RI(II)-K1.F-18 matrices of equivalence to all participants in the BIPM.RI(II)-K4.F-18 comparisons

Comparison
Comparison close
Results

BIPM.RI(II)-K1.F-18 and BIPM.RI(II)-K4.F-18

 

MEASURAND           Equivalent activity of F-18

 

xi   result of measurement carried out in the SIR for the sample submitted by laboratory i, Labi

ui   combined standard uncertainty of xi

 

BIPM.RI(II)-K1.F-18

  Labi xi ui Date of measurement
    kBq kBq  
  BEV 15 390 160 2002-11-12
  CIEMAT 15 216 97 2004-05-13
  PTB 15 316 50 2005-04-13
  LNE-LNHB 15 203 62 2010-07-05

 

BIPM.RI(II)-K4.F-18

  Labi xi ui Date of measurement
  kBq kBq
  VNIIM 15 197 97 June 2014
  NPL 15 311 52 Sept. 2014
  ENEA-INMRI 15 368 49 Oct. 2014
  NMISA 15 328 96 Nov. 2015
  NIST 15 291 64 May 2016
  POLATOM 15 323 88 Oct. 2016
  NRC 15 332 56 June 2017