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BIPM.RI(II)-K1.Eu-152, CCRI(II)-K2.Eu-152
and COOMET.RI(II)-K2.Eu-152

MEASURAND : SIR equivalent activity of 152Eu

Graph of equivalence

In Red: participants in BIPM.RI(II)-K1.Eu-152
In Blue: participants in CCRI(II)-K2.Eu-152 (1999)
In Green: participants in COOMET.RI(II)-K2.Eu-152 (2010)
Note: the right hand axis shows approximate values only

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BIPM.RI(II)-K1.Eu-152, CCRI(II)-K2.Eu-152
and COOMET.RI(II)-K2.Eu-152

MEASURAND : Equivalent activity of 152Eu

Degrees of equivalence relative to the BIPM.RI(II)-K1.Eu-152 key comparison reference value

In Black: participants in BIPM.RI(II)-K1.Eu-152
In Blue: participants in CCRI(II)-K2.Eu-152
In Green: participants in COOMET.RI(II)-K2.Eu-152

Results are presented under A4 printable format in Summary Results (PDF file).

Unless otherwise stated, in the final numbers presented here, rounding has been applied according to ISO 80000-1:2009 Annex B Rule B.

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RMO comparison
Linked comparison
COOMET.RI(II)-K2.Eu-152
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Metrology area, Sub-field Ionizing Radiation, Section II (Measurement of Radionuclides)
Description Activity concentration of the same Eu-152 solution
Time of measurements 2009 - 2010
Status Approved for equivalence
Final Reports of the comparisons
COOMET.RI(II)-K2.Eu-152 Final Report, 2013, 7 pages
Metrologia, 2013, 50, Tech. Suppl., 06012
Metrologia, 2014, 51, Tech. Suppl., 06004
Measurand Activity concentration of the same solution
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 423/RU/08
Comments Final Report published on 29 May 2013
Results published on 04 March 2014
CCRI(II)-K2.Eu-152 and COOMET.RI(II)-K2.Eu-152 results are linked to those of BIPM.RI(II)-K1.Eu-152.
SIR equivalent activity of the radionuclide 152Eu
:
Pilot institute VNIIM
D.I. Mendeleyev Institute for Metrology, Rosstandart
Russian Federation
Contact person I.A. Kharitonov

+7 812 323 96 11
First Name Last Name
wwww@ww.www +356719836 Institute 1 Institute 1 Khmelnitskiy
Pilot laboratory
VNIIM

D.I. Mendeleyev Institute for Metrology, Rosstandart, Russian Federation, COOMET

BelGIM

Belarussian State Institute for Metrology, Belarus, COOMET

CENTIS

Centro de Isótopos, Cuba, COOMET

SMU

Slovensky Metrologicky Ustav, Slovakia, EURAMET

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BIPM.RI(II)-K1.Eu-152, CCRI(II)-K2.Eu-152
and COOMET.RI(II)-K2.Eu-152

MEASURAND : Equivalent activity of 152Eu

  • Key comparison BIPM.RI(II)-K1.Eu-152
Key comparison reference value:
The SIR reference value for this radionuclide is xR = 14919 kBq, with a standard uncertainty uR = 35 kBq, see section 4.1 of the Final Report dated 2014.
The value xi is taken as the equivalent activity for laboratory i.
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 MBq.
Ui = 2((1 - 2wi)ui2 + uR2)1/2 when each laboratory has contributed to the calculation of xR.
When required, 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 MBq. The approximation Uij ~ 2(ui2 + uj2)1/2 may be used.
  • Linking CCRI(II)-K2.Eu-152 to BIPM.RI(II)-K1.Eu-152
The value xi is the equivalent activity for laboratory i participant in CCRI(II)-K2.Eu-152 having been also been measured in the SIR (see Final Report).
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 MBq.
Ui = 2((1 - 2wi)ui2 + uR2)1/2 when each laboratory has contributed to the calculation of xR.

When required, the degree of equivalence between two laboratories i and j, one participant in BIPM.RI(II)-K1.Eu-152 and one in CCRI(II)-K2.Eu-152, or both participant in CCRI(II)-K2.Eu-152, is given by a pair of terms:
Dij = Di - Dj and Uij, its expanded uncertainty (k = 2), both expressed in MBq. The approximation Uij ~ 2(ui2 + uj2 )1/2 may be used.
  • Linking COOMET.RI(II)-K2.Eu-152 to BIPM.RI(II)-K1.Eu-152
The value xi is the equivalent activity for laboratory i participant in COOMET.RI(II)-K2.Eu-152 having been normalized to the value of the VNIIM as the linking laboratory.
The degree of equivalence of laboratory i participant in COOMET.RI(II)-K2.Eu-152 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 as none of the participants in COOMET.RI(II)-K2.Eu-152 contributed to the computation of the key comparison reference value.
When required, the degree of equivalence between two laboratories i and j, one participant in BIPM.RI(II)-K1.Eu-152 and one in COOMET.RI(II)-K2.Eu-152, or one participant in CCRI(II)-K2.Eu-152 and one in COOMET.RI(II)-K2.Eu-152, or both participant in COOMET.RI(II)-K2.Eu-152 is given by a pair of terms expressed in MBq:
Dij = Di - Dj and Uij, its expanded uncertainty (k = 2), approximated by
Uij ~ 2(ui2 + uj2 - 2ful2)1/2 with l being the linking laboratory when each laboratory is from the COOMET.RI(II)-K2.Eu-152 and f is the correlation coefficient.
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Results
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BIPM.RI(II)-K1.Eu-152, CCRI(II)-K2.Eu-152
and COOMET.RI(II)-K2.Eu-152

  • Key comparison BIPM.RI(II)-K1.Eu-152

MEASURAND : Equivalent activity of 152Eu

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
 NIST 14892 57 2001-11-27
 VNIIM 15003 50 2009-01-12
 LNE-LNHB 14932 50 2009-04-15
 CNEA 14770 81 2011-10-12
  • Key comparison CCRI(II)-K2.Eu-152

MEASURAND : Equivalent activity of 152Eu

xi : result of measurement carried out in the SIR for the sample submitted by laboratory i (see Final Report)
ui : combined standard uncertainty of xi

 Lab i

xi / kBq

ui / kBq

 Date of measurement
 BARC 14830 130 1999
 BEV 14869 109 1999
 BIPM 15052 75 1999
 CIEMAT 14614 55 1999
 CMI-IIR 14971 75 1999
 ENEA-INMRI 14657 48 1999
 IFIN-HH 14880 160 1999
 IRA 14797 30 1999
 IRMM 14924 57 1999
 KRISS 15134 32 1999
 LNMRI/IRD 14760 140 1999
 MKEH 14944 40 1999
 NIM 14853 96 1999
 NMIJ 15042 101 1999
 NPL 14970 130 1999
 NRC 15029 33 1999
 POLATOM 14884 40 1999
 PTB 14930 52 1999

  • Key comparison COOMET.RI(II)-K2.Eu-152

xi : result of measurement carried out at laboratory i converted to the equivalent activity through the VNIIM
ui : combined standard uncertainty of xi

 Lab i

xi / kBq

ui / kBq

 Date of measurement
 BelGIM 14950 110 2010
 CENTIS-DMR 15030 200 2010
 SMU 15020 110

2010

Unless otherwise stated, in the final numbers presented here, rounding has been applied according to ISO 80000-1:2009 Annex B Rule B.