Proficiency Test on Gasoline finished

The full report can be downloaded (as .pdf-file). To download the report, please click the right mouse button and choose the "save as" option.

Download the report (iis14B01ASTM) of this Proficiency Test on Gasoline incl. DVPE.

For viewing the report you will need Adobe Acrobat Reader getacro.gif (712 bytes)

 

Summary of this proficiency test:

On 24 April 2014, the proficiency test on Gasoline (iis14B01ASTM) was finished. It started on 6 February 2014 (see message "Proficiency Test on Gasoline started" on this website) when the samples were distributed.

In this interlaboratory study 135 participants in 66 different countries have participated.

The participants were requested to determine API gravity, Benzene, Copper strip 3hrs/15ºC, Distillation, Doctor test, Density @15ºC, Existent gum (washed), olefins, aromatics, Pb, Oxyganates, phosporus, Sulphur, oxygen content, Oxidation Stability, RON/MON, Total vapour pressure and DVPE.

The proficiency test report summarises per test, the test results, the analytical methods reported by the participants and the z-scores calculated for each participant are tabulated. Also, for each test, the calculated summary (e.g. mean, standard deviation and reproducibility) is given.

In the report also an evaluation of the test results is given. Problems encountered in the analyses are mentioned and - where possible - suggestions for quality improvement are formulated. For each test a comparison is made between the results of the group of participants and the requirements given by the relevant ASTM standard.