|Proficiency Test on
Engine Oil (Used) is 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.
Summary of this proficiency test:
On 11 September 2017, the proficiency test on Engine Oil (Used) (iis17L06) was finished. It started on 24 May 2017 (see message "Proficiency Test on Engine Oil (Used) started" on this website) when the samples were distributed.
In this interlaboratory study 76 participants in 46 different countries have participated.
The proficiency test report summarises the test results, the analytical methods reported by the participants and the z-scores calculated for each participant are tabulated. Also 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.