Proficiency Test on Acetone finished

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Download the report (iis15C09) of this Proficiency Test on Acetone

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Summary of this proficiency test:

On 26 October 2015, the proficiency test Acetone (iis15C09) was finished. It started on 19 Augustus 2015 (see message “Proficiency Test on Acetone started” on this website) when the samples were distributed.

In this interlaboratory study 24 participants in 15 different countries have participated.

The samples were analyzed on: Appearance, Purity, Colour Pt/Co, Water, Distillation range @760 mmHg, Density @20°C, Specific gravity 20/20, Permanganate time test @15°C,  Methanol, Chloride, Acidity, Aldehydes, Nonvolatile Matter, Miscibility (water),   Diacetonalcohol, Mesityloxide and Refractive Index @20°C.

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).