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The 2017 Proficiency Test on Isopropanol has 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 (iis17C18) of this Proficiency Test on Isopropanol.  


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Summary of this proficiency test:


On 22 February 2018, the proficiency test on Isopropanol (iis17C18) was finished. It started on 8 November 2017 (see message "Proficiency Test on Isopropanol" on this website) when the samples were distributed.

On that date, the samples were dispatched to the laboratories. Enclosed to the sample was the material safety data sheet (MSDS).


In this interlaboratory study 19 participants in 15 different countries have participated.


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. EN, ISO, DIN, ASTM).



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