|Proficiency Test on Acetic Acid 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.
Summary of this proficiency test:
On 11 April 2011, the proficiency test on Acetic Acid (iis11C02) was finished. It started on 2 February 2011 (see message “Proficiency Test on Acetic Acid started” on this website) when the samples were distributed.
In this interlaboratory study 28 laboratories 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 iis 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).