MEASURAND : Mass fraction of Sulfur in diesel fuel
NOMINAL VALUE : ~ 42 µg/g

Degrees of equivalence: Di = (xi - xR) and expanded uncertainty Ui (k = 2), both expressed in µg/g

MEASURAND : Mass fraction of Sulfur in diesel fuel
NOMINAL VALUE : ~ 42 µg/g

Degrees of equivalence: Di = (xi - xR) and expanded uncertainty Ui (k = 2), both expressed in µg/g

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

Comparison
Comparison close
CC comparison
Linked comparison
CCQM-K35
Metrology area, Sub-field Chemistry and Biology, Inorganics
Description Sulfur in diesel fuel
Time of measurements 2003 - 2004
Status Approved for equivalence
Final Reports of the comparisons
Measurand Mass fraction of Sulfur in diesel fuel: ~ 42 µg/g
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 01 June 2007

Sulfur in diesel fuel

Pilot institute NIST
National Institute of Standards and Technology
United States
Contact person G. Turk

+1 301 975 4118
First Name Last Name
wwww@ww.www +356719836 Institute 1 Institute 1 Khmelnitskiy
Pilot laboratory
NIST

National Institute of Standards and Technology, United States, SIM

BAM

Bundesanstalt für Materialforschung und -prüfung, Germany, EURAMET

LGC

Laboratory of the Government Chemist, United Kingdom, EURAMET

MEASURAND : Mass fraction of Sulfur in diesel fuel
NOMINAL VALUE : ~ 42 µg/g

The key comparison reference value, xR, is computed as the Mixture Model median of all results (see page 11 of the Final Report). Its expanded uncertainty at 95% level of confidence is denoted UR.

xR = 42.17 µg/g, UR = 1.32 µg/g

The degree of equivalence of laboratory i relative to the key comparison reference value is given by a pair of terms, both expressed in µg/g:
Di = (xi - xR) and its expanded uncertainty Ui (k = 2), with
Ui = 2[ui2 + (UR/2)2]1/2.

No pair-wise degrees of equivalence are calculated for this key comparison.

MEASURAND : Mass fraction of Sulfur in diesel fuel
NOMINAL VALUE : ~ 42 µg/g

xi : mean of the measurement results carried out by laboratory i
ULab i : expanded uncertainty of xi at a 95 % level of confidence
kLab i : coverage factor, ULab i = kLab i ui, with ui the combined standard uncertainty of xi

 Lab i xi
/ (µg/g)
ULab i
/ (µg/g)
kLab i
 BAM 42.29 0.26 2
 IRMM

42.92

0.36

2

 LGC

41.36

1.7

2

 NIST

41.57

0.39

2.31