BIPM.RI(II)-K1.Sr-85
MEASURAND SIR equivalent activity of Sr-85
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.
BIPM.RI(II)-K1.Sr-85
MEASURAND SIR equivalent activity of Sr-85
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 given in relative values.
BIPM.RI(II)-K1.Sr-85
MEASURAND SIR equivalent activity of Sr-85
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 |
||
| NIST | 0.10 | 0.21 | ||
| NMIJ | 0.15 | 0.32 | ||
| POLATOM | 0.15 | 0.33 | ||
| PTB | 0.20 | 0.22 |
Results given in absolute values.
BIPM.RI(II)-K1.Sr-85
MEASURAND SIR equivalent activity of Sr-85
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 |
||
| NIST | 3.4 | 7.0 | ||
| NMIJ | 5 | 11 | ||
| POLATOM | 5 | 11 | ||
| PTB | 6.6 | 7.2 |
Results given in relative values.
| Metrology area, Sub-field | Ionizing Radiation, Section II (Measurement of Radionuclides) |
| Description | Activity of radionuclide Sr-85 |
| Time of measurements | 1975 - |
| 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 Firts results published on 19 April 2004 Most recent results published on 12 February 2021 The status for not yet completed comparisons is indicated in "Participants" |
| 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 |
| 1975 | |
| NIST |
National Institute of Standards and Technology, United States, SIM |
| 2001 |
| NMIJ AIST |
National Metrology Institute of Japan, Japan, APMP |
| 1994 | |
| 2004 |
| NPL |
National Physical Laboratory, United Kingdom, EURAMET |
| 1981 |
| POLATOM |
Radioisotope Centre Polatom, Poland, EURAMET |
| 2009 |
| PTB |
Physikalisch-Technische Bundesanstalt, Germany, EURAMET |
| 1998 | |
| 2018 |
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BIPM.RI(II)-K1.Sr-85
MEASURAND SIR equivalent activity of Sr-85
The key comparison reference value xR for this radionuclide is estimated to be
xR = 29 983 kBq with a standard uncertainty uR = 52 kBq (see Section 4.1 of the Final Report).
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) /xR and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in kBq/MBq.
BIPM.RI(II)-K1.Sr-85
MEASURAND SIR equivalent activity of Sr-85
xi result of measurement carried out in the SIR for the sample submitted by laboratory i, Labi
ui (xi) combined standard uncertainty of xi
-K1.Sr-85-LIM-2021.png)
