Proficiency Test on Benzene & Toluene finished

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Download the report (iis16C02 & iis16C03) of this Proficiency Test on Benzene & Toluene   .

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Summary of this proficiency test:

On 23 May 2016, the proficiency test on Benzene & Toluene   (iis16C02 & iis16C03) was finished. It started on 17 February 2016   (see message 'Proficiency Test on Benzene & Toluene   started') when the samples were distributed.

In this interlaboratory study 52 participants in 20 countries have participated on Benzene and 41 participants in 20 different countries have participated on Toluene .

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. ISO, ASTM, EN).