Proficiency Test on Chromium VI in Leather finished

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Download the report (iis15A01L) of this Proficiency Test on Chromium VI in Leather

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Summary of this proficiency test:

On 29 April 2015, the proficiency test on Chromium VI in Leather (iis15A01L) was finished. It started on 21 January 2015 (see message Proficiency Test on Chromium VI in Leather started on this website) when the samples were distributed.

In this international interlaboratory study 147 participants in 30 different countries have participated.

The participants were requested to analyze the sample on Chromium VI.

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.