BIPM.RI(II)-K1.Am-241, 2003 CCRI(II)-K2.Am-241,
and 2006 COOMET.RI(II)-K2.Am-241
MEASURAND : SIR equivalent activity of 241Am
Degrees of equivalence Di and expanded uncertainty Ui (k = 2) expressed in MBq
-k1.am-241_g.gif)
Red squares: participants in BIPM.RI(II)-K1.Am-241
Blue circles: participants in CCRI(II)-K2.Am-241 (2003)
Green triangles: participants in COOMET.RI(II)-K2.Am-241 (2006)
Note: the right-hand axis shows approximate relative values only
BIPM.RI(II)-K1.Am-241, 2003 CCRI(II)-K2.Am-241,
and 2006 COOMET.RI(II)-K2.Am-241
MEASURAND : SIR equivalent activity of 241Am
-k1.am-241_doe.gif)
participants in
BIPM.RI(II)-K2.Am-241
participants in CCRI(II)-K2.Am-241
participants in COOMET.RI(II)-K2.Am-241
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 concentration of the same Am-241 solution |
| Time of measurements | 2006 |
| Status | Approved for equivalence |
| Final Reports of the comparisons | |
| Measurand | Activity concentration of the same solution Nominal value: 500 kBq/g |
| Transfer device | Radioactive solution |
| Comparison type | Key Comparison |
| Consultative Committee | CCRI (Consultative Committee for Ionizing Radiation) |
| Conducted by | COOMET (Euro-Asian Cooperation of National Metrological Institutions) |
| RMO Internal Identifier | COOMET 359/RU/06 |
| Comments | Results published on 01 November 2007 COOMET.RI(II)-K2.Am-241 results are linked to those of BIPM.RI(II)-K1.Am-241 SIR equivalent activity of the radionuclide 241Am: |
| Pilot institute |
VNIIM
D.I. Mendeleyev Institute for Metrology, Rosstandart Russian Federation |
| Contact person | I.A. Kharitonov +7 812 323 96 11 |
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.Am-241, CCRI(II)-K2.Am-241,
and COOMET.RI(II)-K2.Am-241
MEASURAND : SIR equivalent activity of 241Am
| Key comparison reference value: The SIR reference value for this radionuclide is xR = 2055.8 MBq, with a standard uncertainty uR = 2.8 MBq, see section 4.1 of the Final Report dated November 2007. |
| The degree of equivalence of laboratory i with respect to the key comparison reference value is given by a pair of terms: Di = (xi - xR) and Ui, its expanded uncertainty (k = 2), both expressed in MBq. With n the number of laboratories,  when each laboratory has contributed to the computation of xR. |
|
The value xi is the equivalent activity for laboratory i participant in CCRI(II)-K2.Am-241 having been normalized using the SIR measurement of the NPL undiluted solution of the CCRI(II)-K2.Am-241 comparison. |
| The degree of equivalence of laboratory i participant in CCRI(II)-K2.Am-241 with respect to the key comparison 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 Matrix of equivalence as none of these laboratories contributed to the computation of xR. |
|
The value xi is the equivalent activity for laboratory i participant in COOMET.RI(II)-K2.Am-241 having been normalized to the SIR measurement of the VNIIM solution of the COOMET.RI(II)-K2.Am-241 comparison. |
| The degree of equivalence of laboratory i participant in COOMET.RI(II)-K2.Am-241 with respect to the key comparison 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 Matrix of equivalence as none of these laboratories contributed to the computation of xR. |
These statements make it possible to extend the BIPM.RI(II)-K1.Am-241 Matrix of equivalence to all participants in the CCRI(II)-K2.Am-241 and the COOMET.RI(II)-K2.Am-241 comparisons.
BIPM.RI(II)-K1.Am-241, 2003 CCRI(II)-K2.Am-241,
and 2006 COOMET.RI(II)-K2.Am-241
MEASURAND : SIR equivalent activity of 241Am
xi : result of measurement carried out in the SIR for the sample submitted by laboratory i
ui : combined standard uncertainty of xi
-k1.am-241_lim1.gif)
xi : result of measurement carried out at laboratory i linked to the SIR through the NPL mother solution
ui : combined standard uncertainty of xi
-k1.am-241_lim2.gif)
xi : result of measurement carried out at laboratory i converted to the equivalent activity through the VNIIM
ui : combined standard uncertainty of xi
-k1.am-241_lim3.gif)
