Proficiency Test on Crude Oil 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 (iis14R01) of this Proficiency Test on Crude Oil

For viewing the report you will need Adobe Acrobat Readerget acrobat


Summary of this proficiency test:

On 19 January 2015, the proficiency test on Crude Oil (iis14R01) was finished. It started on 22 October 2014 (see message "Proficiency Test on Crude Oil started" on this website) when the samples were distributed.

In this interlaboratory study 157 laboratories in 54 countries have participated.

The participants were requested to determine TAN ,BSW, Density , API Gravity, Light ends, Pour Point, Salt, Sediment, Total Sulphur, Total Mercury , Viscosity @ 40ÂșC, Molecular Mass average and Water.

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 standard (e.g. ASTM).