Proficiency Test on Ethanol/gasoline mixturesfinished

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Download the report (iis14C12) of the Proficiency Test on Ethanol/gasoline mixtures.

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Summary of this proficiency test:

On 3 April 2015, the proficiency test on Ethanol/gasoline mixtures (iis14C12) was finished. The PT started 12 November 2014 (see message “Proficiency Test on Ethanol/gasoline mixtures started” on this website) when the samples were distributed.

In this interlaboratory study 18 participants in 8 different countries have participated.

The participants were requested to test the 3 samples were on ethanol content in %M/M and %V/V, using a given density.

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 (ASTM D5501).