Proficiency Test on VAM finished

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Download the report (iis13C03) of this Proficiency Test on VAM

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Summary of this proficiency test:

On 2 April 2013, the proficiency test on VAM (iis13C03) was finished. It started on 30 January 2013 (see message “Proficiency Test on VAM started” on this website) when the samples were distributed.

In this interlaboratory study 26 participants in 18 different countries have participated.

The participants were requested to determine Acidity, Appearance, Purity, Methylacetate, Ethylacetate, Acetone, Acetaldehyde, Inhibitor, Density @ 20°C, Distillation 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).