BIPM.RI(II)-K1.I-131, APMP.RI(II)-K2.I-131, CCRI(II)-S6.I-131 and EURAMET.RI(II)-K2.I-131
MEASURAND : Equivalent activity of I-131
Degrees of equivalence relative to the BIPM.RI(II)-K1.I-131 key comparison reference value
Degrees of equivalence represented by Di = (xi - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in MBq.
Results in absolute values.
BIPM.RI(II)-K1.I-131, APMP.RI(II)-K2.I-131, CCRI(II)-S6.I-131 and EURAMET.RI(II)-K2.I-131
MEASURAND : Equivalent activity of I-131
Degrees of equivalence relative to the BIPM.RI(II)-K1.I-131 key comparison reference value
Degrees of equivalence represented by Di = (xi - xR)/xR and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in kBq/MBq.
Results in relative values
BIPM.RI(II)-K1.I-131, APMP.RI(II)-K2.I-131, CCRI(II)-S6.I-131 and EURAMET.RI(II)-K2.I-131
MEASURAND : Equivalent activity of I-131
Degrees of equivalence relative to the BIPM.RI(II)-K1.I-131 key comparison reference value
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 |
||
| CMI | 0.00 | 0.23 | ||
| IFIN-HH | 0.04 | 0.27 | ||
| NMIJ | 0.06 | 0.19 | ||
| NIST | -0.03 | 0.27 | ||
| LNE-LNHB | -0.19 | 0.18 | ||
| BEV | 0.34 | 0.35 | ||
| POLATOM | -0.10 | 0.31 | ||
| NMISA | 0.18 | 0.31 | ||
| ANSTO | 0.08 | 0.45 | ||
| BARC | -0.30 | 0.39 | ||
| INER | 0.82 | 0.35 | ||
| KRISS | 0.93 | 0.21 | ||
| OAP | 0.50 | 1.3 | ||
| PTKMR | -0.50 | 1.8 | ||
| LNMRI/IRD | -0.2 | 1.1 | ||
| ENEA-INMRI | -0.08 | 0.35 |
Results in absolute values
BIPM.RI(II)-K1.I-131, APMP.RI(II)-K2.I-131, CCRI(II)-S6.I-131 and EURAMET.RI(II)-K2.I-131
MEASURAND : Equivalent activity of I-131
Degrees of equivalence relative to the BIPM.RI(II)-K1.I-131 key comparison reference value
Degrees of equivalence represented by Di = (xi - xR)/xR and 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 |
||
| CMI | 0.0 | 5.8 | ||
| IFIN-HH | 1.0 | 6.8 | ||
| NMIJ | 1.5 | 4.8 | ||
| NIST | -0.8 | 6.8 | ||
| LNE-LNHB | -4.6 | 4.4 | ||
| BEV | 8.4 | 8.6 | ||
| POLATOM | -2.5 | 7.8 | ||
| NMISA | 4.4 | 7.8 | ||
| ANSTO | 2.0 | 11 | ||
| BARC | -7.5 | 10 | ||
| INER | 20 | 9.0 | ||
| KRISS | 23 | 5.0 | ||
| OAP | 14 | 32 | ||
| PTKMR | -12 | 45 | ||
| LNMRI/IRD | -5.0 | 27 | ||
| ENEA-INMRI | -2.0 | 8.6 |
Results in relative values
| Metrology area, Sub-field | Ionizing Radiation, Section II (Measurement of Radionuclides) |
| Description | Activity of radionuclide I-131 |
| Time of measurements | 1977 - |
| 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 First results published on 04 July 2003 Last update: 13 March 2023 Earlier reports and the status of not yet completed results can be found in the participants list. Results older than 20 years are no longer considered valid (see pages 37 and 38 of the CCRI Report of its 18th meeting in 2003). |
| 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 |
| ANSTO |
Australian Nuclear Science and Technology Organisation, Australia, APMP |
| 1994 |
| BARC |
Bhabha Atomic Research Centre, India, APMP |
| 1994 |
| BEV |
Bundesamt für Eich- und Vermessungswesen, Austria, EURAMET |
| 2007 | |
| 2015 |
| CIEMAT |
Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas, Spain, EURAMET |
| 2002 |
| CMI-IIR |
Czech Metrology Institute - Inspectorate for Ionizing Radiation, Czechia, EURAMET |
| 2001 | |
| 2006 |
| IFIN-HH |
"Horia Hulubei" National Institute of Research and Development for Physics and Nuclear Engineering, Romania, EURAMET |
| 2005 | |
| 2008 |
| IRA |
Institut Universitaire de Radiophysique Appliquée, Switzerland, EURAMET |
| 1996 |
| KRISS |
Korea Research Institute of Standards and Science, Korea, Republic of, APMP |
| 2005 |
| LNE-LNHB |
Commissariat à l'énergie atomique / Laboratoire National Henri Becquerel, France, EURAMET |
| 1987 | |
| 2012 |
| LNMRI/IRD |
Laboratorio Nacional de Metrologia das Radiacoes Ionizantes, IRD, Brazil, SIM |
| 1999 |
| NIRH |
National Institute of Radiation Hygiene, Denmark, EURAMET |
| 1991 |
| NIST |
National Institute of Standards and Technology, United States, SIM |
| 1998 | |
| 2012 |
| NMIJ AIST |
National Metrology Institute of Japan, Japan, APMP |
| 1986 | |
| 2009 |
| NMISA |
National Metrology Institute of South Africa, South Africa, AFRIMETS |
| 1980 | |
| 2017 |
| NPL |
National Physical Laboratory, United Kingdom, EURAMET |
| 1999 |
| OMH |
Országos Mérésügyi Hivatal; Subsequently MKEH, now BKFH, Hungary, EURAMET |
| 1998 |
| P3KRBiN |
Pusat Penelitian & Pengembangan Keselamatan Radiasi & Biomedika Nuklir, Indonesia, APMP |
| 1985 |
| POLATOM |
Radioisotope Centre Polatom, Poland, EURAMET |
| 2015 |
| PTB |
Physikalisch-Technische Bundesanstalt, Germany, EURAMET |
| 1993 | |
| 2004 |
This page proposes print-out on A4 paper (portrait) of the comparison details (best printed out using a black and white printer).
Please, select items to be printed out, then click on "OK" :
BIPM.RI(II)-K1.I-131, APMP.RI(II)-K2.I-131, CCRI(II)-S6.I-131 and EURAMET.RI(II)-K2.I-131
BIPM.RI(II)-K1.I-131
MEASURAND : Equivalent activity of I-131
Key comparison reference value: the SIR key comparison reference value xR for this radionuclide is xR = 40 371 kBq with a standard uncertainty uR = 34 kBq
(see Section 4.1 of the BIPM.RI(II)-K1.I-131Final 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 APMP.RI(II)-K2.I-131 to BIPM.RI(II)-K1.I-131
The value xi is the equivalent activity for laboratory i participant in APMP.RI(II)-K2.I-131 having been normalized using the value of the NMIJ as the linking laboratory.
The degree of equivalence of laboratory i participant in APMP.RI(II)-K2.I-131 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 as none of these Di contributed to the key comparison reference value.
Linking CCRI(II)-S6.I-131 to BIPM.RI(II)-K1.I-131
The value xi is the equivalent activity for laboratory i participant in CCRI(II)-S6.I-131 having been normalized using the value of the CMI as the linking laboratory.
The degree of equivalence of laboratory i participant in CCRI(II)-S6.I-131 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 as none of these Di contributed to the key comparison reference value..
Linking EURAMET.RI(II)-K2.I-131 to BIPM.RI(II)-K1.I-131
The value xi is the equivalent activity for laboratory i participant in EURAMET.RI(II)-K2.I-131 having been normalized to the value of the POLATOM as the linking laboratory.
The degree of equivalence of laboratory i participant in EURAMET.RI(II)-K2.I-131 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 as none of these Di contributed to the key comparison reference value..
These statements make it possible to extend the BIPM.RI(II)-K1.I-131 matrices of equivalence to all participants in the APMP.RI(II)-K2.I-131, CCRI(II)-S6.I-131, and EURAMET.RI(II)-K2.I-131 comparisons
BIPM.RI(II)-K1.I-131, APMP.RI(II)-K2.I-131, CCRI(II)-S6.I-131 and EURAMET.RI(II)-K2.I-131
MEASURAND : Equivalent activity of I-131
Degrees of equivalence relative to the BIPM.RI(II)-K1.I-131 key comparison reference value
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.I-131
| Labi | xi | ui | Date of measurement | |
| kBq | kBq | |||
| CMI | 40 370 | 120 | 2006-08-22 | |
| IFIN-HH | 40 410 | 140 | 2008-01-03 | |
| NMIJ | 40 430 | 100 | 2009-03-09 | |
| NIST | 40 340 | 140 | 2012-03-28 | |
| LNE-LNHB | 40 184 | 92 | 2012-11-16 | |
| BEV | 40 710 | 170 | 2015-06-02 | |
| POLATOM | 40 270 | 160 | 2015-10-22 | |
| NMISA | 40 550 | 160 | 2017-09-13 |
APMP.RI(II)-K2.I-131
| Labi | xi | ui | Date of measurement | |
| kBq | kBq | |||
| ANSTO | 40 450 | 220 | March 2009 | |
| BARC | 40 070 | 190 | March 2009 | |
| INER | 41 190 | 170 | March 2009 | |
| KRISS | 41 300 | 100 | March 2009 | |
| OAP | 40 920 | 640 | March 2009 | |
| PTKMR | 39 900 | 900 | March 2009 |
CCRI(II)-S6.I-131
| Labi | xi | ui | Date of measurement | |
| kBq | kBq | |||
| LNMRI/IRD | 40160 | 540 | July 2006 |
EURAMET.RI(II)-K2.I-131
| Labi | xi | ui | Date of measurement | |
| kBq | kBq | |||
| ENEA-INMRI | 40290 | 170 | December 2015 |
