|Proficiency Test on
Azo dyes in Leather 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 8 May 2013, the proficiency test on Azo dyes in Leather (iis13A01L) was finished. It started on 6 March 2013 (see message "Proficiency Test on Azo dyes in Leather started" on this website) when the samples were distributed.
In this interlaboratory study 129 laboratories in 30 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 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 (ISO17234-1).