Proficiency Test on Disperse Allergenic dyes finished

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Download the report (iis15A03) of this Proficiency Test on Disperse dyes

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Summary of this proficiency test:

On 6 August 2015, the proficiency test on Disperse dyes (iis15A03) was finished. It started on 4 March 2015 (see message "Proficiency Test on Disperse dyes started" on this website) when the samples were distributed.

In this interlaboratory study 85 participants in 23 different countries have participated.

The participants were requested to determine 20 forbidden allergenic dyes: Disperse Blue 1, 3, 7, 26, 35, 102, 106, 124, Disperse Brown 1, Disperse Orange 1, 3, 76, Disperse Red 1, 11, 17 and Disperse Yellow 1, 3, 9, 39 and 49.

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 (e.g. EN, ISO, DIN, LMBG, LFGB).