MEASURAND : Pb isotope amount ratio in a pure Pb solution
Degrees of equivalence Di and expanded uncertainty Ui (k = 2)
MEASURAND : Pb isotope amount ratio in a bronze sample
Degrees of equivalence Di and expanded uncertainty Ui (k = 2)
MEASURAND : Pb isotope amount ratio in a pure Pb solution
Degrees of equivalence Di and expanded uncertainty Ui (k = 2)
Isotope amount ratio n(206Pb)/n(204Pb) in a pure Pb solution
Isotope amount ratio n(207Pb)/n(204Pb) in a pure Pb solution
Isotope amount ratio n(208b)/n(204Pb) in a pure Pb solution
Isotope amount ratio n(208Pb)/n(206Pb) in a pure Pb solution
Results are presented under A4 printable format in Summary Results (PDF file).
MEASURAND : Pb isotope amount ratio in a bronze sample
Degrees of equivalence Di and expanded uncertainty Ui (k = 2)
Isotope amount ratio n(206Pb)/n(204Pb) in a bronze sample
Isotope amount ratio n(207Pb)/n(204Pb) in a bronze sample
Isotope amount ratio n(208b)/n(204Pb) in a bronze sample
Isotope amount ratio n(208Pb)/n(206Pb) in a bronze sample
Results are presented under A4 printable format in Summary Results (PDF file).
| Metrology area, Sub-field | Chemistry and Biology, Inorganics |
| Description | Isotopic abundance ratios of Pb in a pure solution and in bronze |
| Time of measurements | 2012 - 2013 |
| Status | Approved for equivalence |
| Final Reports of the comparisons | |
| Measurand | Isotope amount ratios of Pb in bronze: natural range |
| Transfer device | Dedicated samples |
| Comparison type | Key Comparison |
| Consultative Committee | CCQM (Consultative Committee for Amount of Substance) |
| Conducted by | CCQM (Consultative Committee for Amount of Substance) |
| Comments |
Results published on 07 October 2014 Isotopic abundance ratios of lead
|
| Pilot institute |
BAM
Bundesanstalt für Materialforschung und -prüfung Germany |
| Contact person | Jochen Vogl +49 30 8104 1144 |
| Pilot laboratory | |
|---|---|
| BAM |
Bundesanstalt für Materialforschung und -prüfung, Germany, EURAMET |
| KRISS |
Korea Research Institute of Standards and Science, Korea, Republic of, APMP |
| LGC |
Laboratory of the Government Chemist, United Kingdom, EURAMET |
| MIKES-SYKE |
Finnish Environment Institute, Finland, EURAMET |
| NIM |
National Institute of Metrology, China, APMP |
| NIST |
National Institute of Standards and Technology, United States, SIM |
| NMIJ AIST |
National Metrology Institute of Japan, Japan, APMP |
| PTB |
Physikalisch-Technische Bundesanstalt, Germany, EURAMET |
| UME |
TÜBITAK Ulusal Metroloji Enstitüsü, Türkiye, EURAMET |
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 : Pb isotope amount ratio in a pure Pb solution
|
For each measured Pb isotope amount ratio, the key comparison reference value, xR, is obtained from the arithmetic mean of the participants’ results excluding outliers, and its standard uncertainty, uR, is computed as explained in section 5.1 of the Final Report.
|
| For each measured Pb isotope amount ratio, the degree of equivalence of each 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), Ui = 2(ui2 + uR2)1/2. |
| No pair-wise degrees of equivalence are computed here. |
MEASURAND : Pb isotope amount ratio in a bronze sample
|
For each measured Pb isotope amount ratio, the key comparison reference value, xR, is obtained from the arithmetic mean of the participants’ results excluding outliers, and its standard uncertainty, uR, is computed as explained in section 5.1 of the Final Report.
|
| For each measured Pb isotope amount ratio, the degree of equivalence of each 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), Ui = 2(ui2 + uR2)1/2. |
| No pair-wise degrees of equivalence are computed here. |
MEASURAND : Pb isotope amount ratio in a pure Pb solution
xi : result of measurement carried out by laboratory i
ui : combined standard uncertainty of xi
Isotope amount ratio n(206Pb)/n(204Pb) in a pure Pb solution
Isotope amount ratio n(207Pb)/n(204Pb) in a pure Pb solution
Isotope amount ratio n(208b)/n(204Pb) in a pure Pb solution
Isotope amount ratio n(208Pb)/n(206Pb) in a pure Pb solution
MEASURAND : Pb isotope amount ratio in a bronze sample
xi : result of measurement carried out by laboratory i
ui : combined standard uncertainty of xi
Isotope amount ratio n(206Pb)/n(204Pb) in a bronze sample
Isotope amount ratio n(207Pb)/n(204Pb) in a bronze sample
Isotope amount ratio n(208b)/n(204Pb) in a bronze sample
Isotope amount ratio n(208Pb)/n(206Pb) in a bronze sample
