Proficiency Test on Acetic Acid finished

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Download the corrected report (iis10C01Xcorrected) of this Proficiency Test on Acetic Acid

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Summary of this proficiency test:

On 26 April 2010, the proficiency test on Acetic Acid (iis10C01) was finished. It started on 24 February 2009 (see message “Proficiency Test on Acetic Acid started” on this website) when the samples were distributed.

In this international interlaboratory study 25 participants in 16 different countries have participated.

The participants were requested to determine Acetaldehyde, Appearance, Colour Pt/Co, Chloride, Density, Formic Acid, Freezing point, Iron, Nonvolatile Matter, Purity (calculated from freezing point & titrimetric), Water, and Sulphate.

The proficiency test report summarises per test, the test results, the analytical methods reported by the participants and the z-scores calculated by i.i.s. 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).

Interested parties can order a hard copy of the report; the price for non-participants is Euro 35.