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Download the report (iis13C14) of this Proficiency Test on Isopropanol

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Summary of this proficiency test:

On 13 February 2014, the proficiency test Isopropanol (iis13C14) was finished.
It started on 30 October 2013 (see message “Proficiency Test on Isopropanol started” on this website) when the samples were distributed.

In this interlaboratory study 17 participants in 12 different countries have participated.

The sample was tested on: Acidity, Appearance, Specific Gravity20/20°C, Density@20°C, Chloride, Colour, Distillation, Nonvolatile matter, Water, and GC analysis

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).