MEASURAND : SIR equivalent activity of 56Co
Degrees of equivalence Di and expanded uncertainty Ui (k = 2) expressed in kBq
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MEASURAND : SIR equivalent activity of 56Co
| Lab i | Di | Ui |
| / kBq | / kBq | |
| NPL | 11 | 50 |
| PTB | -3 | 38 |
| LNE-LNHB | 29 | 26 |
| CMI-IIR | -37 | 46 |
Results are presented under A4 printable format in Summary Results (.PDF file).
| Metrology area, Sub-field | Ionizing Radiation, Section II (Measurement of Radionuclides) |
| Description | Activity of radionuclide Co-56 |
| Time of measurements | 1991 - |
| 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 Results published on 14 November 2002, then updated on 30 March 2010 SIR equivalent activity of the radionuclide 56Co: |
| Pilot institute |
BIPM
Bureau International des Poids et Mesures BIPM - International Organization |
| Contact person | Carine Michotte +33 (0) 1 45 07 70 85 |
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" :
MEASURAND : SIR equivalent activity of 56Co
| Key comparison reference value: The SIR reference value for this radionuclide is xR = 5066 kBq, with a standard uncertainty uR = 14 kBq. xR is computed as the mean of the participants' results. |
| The degree of equivalence of each laboratory 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 kBq. With n the number of laboratories,  , see section 4.1 of the Final Report dated 23 March 2010. |
| The degree of equivalence between two laboratories is given by a pair of terms: Dij = Di - Dj = (xi - xj) and Uij, its expanded uncertainty (k = 2), both expressed in kBq. The approximation Uij ~ 2(ui2 + uj2)1/2 is used for the computation of the pair-wise degrees of equivalence. |
MEASURAND : SIR equivalent activity of 56Co
xi : result of measurement carried out in the SIR for the sample submitted by laboratory i
ui : combined standard uncertainty of xi
| Lab i | xi / kBq |
ui / kBq |
Date of measurement |
| NPL | 5076 | 31 | 91-04-05 |
| PTB | 5063 | 21 | 95-12-12 |
| LNE-LNHB | 5094 | 8 | 98-03-10 and 98-05-07 |
| CMI-IIR |
5029 |
28 |
06-05-04 |
LNE-LNHB: mean of both measurements
