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Download the report (iis11V02) of this Proficiency Test on Migration of Certain Elements 

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Summary of this proficiency test:

On 26 April 2011, the proficiency test Total Migration of Certain Elements (iis11V02) was finished. It started on 16 February 2011 (see message “Proficiency Test on Migration of Certain Elements started” on this website) when the samples were distributed.

In this interlaboratory study 95 laboratories in 25 different countries have participated.

The participants were asked to analyze the samples on As, Ba, Cd, Cr, Co, Hg, Pb, ni, Sb and Se.

The proficiency test report summarises per test, the test results, the analytical methods reported by the participants and the z-scores calculated by i.i.s. 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, ASTM).