Proficiency Test on Azo dyes in Leather  finished

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Download the report (iis11A01L) of this Proficiency Test on Azo dyes in Leather

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Summary of this proficiency test:

On 13 May 2011, the proficiency test on Azo dyes in Leather (iis11A01L) was finished. It started on 9 March 2011 (see message “Proficiency Test on Azo dyes in Leather started” on this website) when the samples were distributed.

In this interlaboratory study 89 laboratories in 21 different countries have participated.

The participants were asked to analyze the samples on 24 forbidden aromatic amines

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, EN).