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.
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.
Results given in relative values
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 |
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 |
Results given in relative values
| 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 |
| Pilot laboratory | |
|---|---|
| BIPM |
Bureau International des Poids et Mesures, BIPM - International Organization, N/A |
| BEV |
Bundesamt für Eich- und Vermessungswesen, Austria, EURAMET |
| 2002 |
| CIEMAT |
Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas, Spain, EURAMET |
| 2004 |
| IRA |
Institut Universitaire de Radiophysique Appliquée, Switzerland, EURAMET |
| 2001 |
| LNE-LNHB |
Commissariat à l'énergie atomique / Laboratoire National Henri Becquerel, France, EURAMET |
| 2010 |
| NPL |
National Physical Laboratory, United Kingdom, EURAMET |
| 2003 |
| PTB |
Physikalisch-Technische Bundesanstalt, Germany, EURAMET |
| 2005 |
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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 = (xi - xR) and Ui its 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
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 |
