Proficiency Test on Base 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 (iis14L01) of this Proficiency Test on Base Oil

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


Summary of this proficiency test:

On 8 July 2014, the proficiency test on Base Oil (iis14L01) was finished. It started on 16 April 2014 (see message “Proficiency Test on Base Oil started” on this website) when the samples were distributed.

In this international interlaboratory study 44 participants in 25 different countries have participated.

The participants were requested to determine Acid Number, Air-Release Time, Colour, CCR, Density @15@°C, Flash Point COC, CCS-viscosity, Kinematic viscosity @40@°C, Kinematic viscosity @100@°C Viscosity Stabinger @40@°C, Viscosity Stabinger @100@°C, Viscosity index, Evaporation loss by Noack test, Pourpoint, Rust Prevention,Sulphur 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. ISO, DIN, ASTM).