EURAMET.RI(II)-K2.Ho166
MEASURAND Activity concentration of a Ho-166 solution
NOMINAL VALUE 2600 kBq/g
Degrees of equivalence represented by Di = (xI - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in kBq/g.
EURAMET.RI(II)-K2.Ho166
MEASURAND Activity concentration of a Ho-166 solution
NOMINAL VALUE 2600 kBq/g
Degrees of equivalence represented by Di = (xI - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in kBq/g.
| LABi | Di | Uneg,i | Upos,i | |
|---|---|---|---|---|
kBq/g |
kBq/g |
kBq/g |
||
| CMI | -0.8 | 5.2 | ||
| ENEA | 46.5 | 74.1 | ||
| LNE-LNHB | 2.4 | 16.3 | ||
| NPL | 0.5 | 15.4 |
| Metrology area, Sub-field | Ionizing Radiation, Section II (Measurement of Radionuclides) |
| Description | Activity concentration of the same Ho-166 solution |
| Time of measurements | 2017 - 2018 |
| Status | Approved |
| Final Reports of the comparisons | |
| References | |
| Measurand | Activity concentration (Bq/g) |
| Transfer device | Samples of Ho-166 as Ho(NO33)3 in 1 M HNO3 in flame-sealed SIR-type ampoules. |
| Comparison type | Key Comparison |
| Consultative Committee | CCRI (Consultative Committee for Ionizing Radiation) |
| Conducted by | EURAMET (European Association of National Metrology Institutes) |
| RMO Internal Identifier | EURAMET 1435 |
| Pilot institute |
CMI
Czech Metrology Institute Czechia |
| Contact person | J Solc +420 266 020 487 |
| Pilot laboratory | |
|---|---|
| CMI |
Czech Metrology Institute, Czechia, EURAMET |
| ENEA-INMRI |
Istituto Nazionale di Metrologia delle Radiazioni Ionizzanti, Italy, EURAMET |
| LNE-LNHB |
Commissariat à l'énergie atomique / Laboratoire National Henri Becquerel, France, EURAMET |
| NPL |
National Physical Laboratory, United Kingdom, EURAMET |
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EURAMET.RI(II)-K2.Ho166
MEASURAND Activity concentration of a Ho-166 solution
NOMINAL VALUE 2600 kBq/g
The key comparison reference value xR and its associated standard uncertainty uR are computed from a power-moderated mean method based on the reported results, ENEA excluded.
xR = 2623.6 kBq/g uR = 3.6 kBq/g
The degree of equivalence of laboratory i relative to the key comparison reference value xR is given by a pair of terms, both expressed in kBq/g:
Di = (xi - xR) and its expanded uncertainty Ui at a 95 % level of confidence where Ui = 2 ui.
EURAMET.RI(II)-K2.Ho166
MEASURAND Activity concentration of a Ho-166 solution
NOMINAL VALUE 2600 kBq/g
xi activité per mass as reported by laboratory i, Labi
u combined standard uncertainty of x
| Labi | xi | u (xi) | |
| kBq / g | kBq / g | ||
| CMI | 2622.8 | 4.4 | |
| ENEA | 2670.1 | 37 | |
| LNE-LNHB | 2626.0 | 8.9 | |
| NPL | 2624.1 | 8.5 | |
