Proficiency Test on Biogasoline E85 finished

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Download the report (iis16B04) of this Proficiency Test on Biogasoline E85.

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Summary of this proficiency test:

On 15 August 2016, the proficiency test on Biogasoline E85 (iis16B04) was finished. It started on 4 May 2016 (see message "Proficiency Test on Biogasoline E85 started" on this website) when the samples were distributed.

In this interlaboratory study 17 participants in 12 different countries have participated.

The participants were requested to determine Acidity , Chloride, Copper Strip 3hrs @50°C, Density @ 15°C, Cu, Oxidation Stability, Oxygenates, Sulphur, Existent gum, Electric Conductivity @25°C, pHe, P, Sulphate and Water.

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, ASTM).