MEASURAND : Mass fraction of Pb in red wine
Degrees of equivalence Di and expanded uncertainty Ui (k = 2) expressed in ng/g
Note: DINM(RO) = 4.72 ng/g, UINM(RO) = 1.98 ng/g
MEASURAND : Mass fraction of Pb in red wine
| Lab i | Di | Ui |
| / (ng/g) | / (ng/g) | |
| NMISA | 0.01 | 0.14 |
| INM(RO) | 4.72 | 1.98 |
| INMETRO | -1.37 | 0.10 |
| IRMM | -0.05 | 0.06 |
| KRISS | -0.10 | 0.06 |
| LGC | 0.01 | 0.11 |
| LNE | 0.14 | 0.13 |
| NIM | 0.08 | 0.18 |
| NMIA | -0.01 | 0.21 |
| NMIJ | -0.05 | 0.05 |
| PTB | -0.03 | 0.08 |
Results are presented under A4 printable format in Summary Results (.PDF file).
| Metrology area, Sub-field | Chemistry and Biology, Inorganics |
| Description | Lead in wine |
| Time of measurements | 2006 - 2007 |
| Status | Approved for equivalence |
| Final Reports of the comparisons | |
| Measurand | Mass fraction of Pb: ~ 3 ng/g |
| Transfer device | Samples of Chilean red wine (Cabernet Sauvignon, vintage 2003) contained in 0.1 L glass bottles |
| 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 18 January 2008 Lead in red wine |
| Pilot institute |
LGC
Laboratory of the Government Chemist United Kingdom |
| Contact person | Mike Sargent +44 (0) 20 8943 7360 |
| Additional |
| Pilot laboratory | |
|---|---|
| LGC |
Laboratory of the Government Chemist, United Kingdom, EURAMET |
| INM |
National Institute of Metrology, Romania, EURAMET |
| INMETRO |
Instituto Nacional de Metrologia, Qualidade e Tecnologia, Brazil, SIM |
| IRMM |
Institute for Reference Materials and Measurements, European Union, EURAMET |
| KRISS |
Korea Research Institute of Standards and Science, Korea, Republic of, APMP |
| LNE |
Laboratoire national de métrologie et d'essais, France, EURAMET |
| NIM |
National Institute of Metrology, China, APMP |
| NMIA |
National Measurement Institute, Australia, Australia, APMP |
| NMIJ AIST |
National Metrology Institute of Japan, Japan, APMP |
| NMISA |
National Metrology Institute of South Africa, South Africa, AFRIMETS |
| PTB |
Physikalisch-Technische Bundesanstalt, Germany, 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 : Mass fraction of Pb in red wine
| The key comparison reference value, xR, is computed as the mean of 9 results (all results except those obtained by INM(RO) and by INMETRO). Its standard uncertainty, uR, is calculated as the standard deviation of the mean. Its expanded uncertainty UR = kRuR is obtained using the coverage factor kR = 2.3, which corresponds to 8 effective degrees of freedom. |
xR = 2.99 ng/g and UR = 0.06 ng/g
| 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), Ui = 2(ui2 + uR2)1/2, both expressed in ng/g. |
| The degree of equivalence between two laboratories i and j is given by a pair of terms: Dij = Di - Dj = (xi - xj) and Uij, its expanded uncertainty (k = 2), Uij = 2(ui2 + uj2)1/2, both expressed in ng/g. |
MEASURAND : Mass fraction of Pb in red wine
xi : result of measurement carried out by laboratory i
ULabi : expanded uncertainty reported by laboratory i
ki : coverage factor used by laboratory i
ULabi = kiui, where ui is the combined standard uncertainty of xi
| Lab i | xi / (ng/g) |
ULabi / (ng/g) |
ki | ULabi / xi |
| NMISA | 3.001 | 0.136 | 2 |
4.5 % |
| INM(RO) | 7.71 | 1.98 | 2 |
26 % |
| INMETRO | 1.62 | 0.088 | 2 |
5.4 % |
| IRMM | 2.940 | 0.033 | 2 |
1.1 % |
| KRISS | 2.893 | 0.044 | 2.13 |
1.5 % |
| LGC | 3.00 | 0.10 | 2 |
3.4 % |
| LNE |
3.13 |
0.12 |
2 |
3.8 % |
| NIM |
3.07 |
0.17 |
2 |
5.5 % |
| NMIA |
2.98 |
0.20 |
1.99 |
6.7 % |
| NMIJ |
2.936 |
0.025 |
2 |
0.85 % |
| PTB | 2.96 | 0.08 | 2.4 |
2.7 % |
