Proficiency Test on Phthalates in Plastics finished

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Download the report (iis11P01) of this Proficiency Test on Phthalates in Plastics

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Summary of this proficiency test:

On 5 May 2011, the proficiency test on Phthalates in Plastics (iis11P01) was finished. It started on 16 February 2011 (see message “Proficiency Test on Phthalates in Plastics started” on this website) when the samples were distributed.

In this interlaboratory study 124 laboratories in 29 different countries have participated.

The participants were requested to determine a number of individual phthalates (DINP, DBP, BBP, DIDP, DNOP, DEHP, DHP and other Phthalates)

The proficiency test report summarises per phthalate, the test results, the analytical methods reported by the participants and the z-scores for each participant are tabulated. Also, for each phthalate, 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).