Proficiency Test on Ethanol (Fuel-.Bio) finished

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Download the revised report (iis14C10) of the Proficiency Test on ethanol (Fuel-/Bio-).

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Summary of this proficiency test:

On 27 March 2015, the proficiency test on Fuel/Bio-Ethanol (iis14C10) was finished. The PT started 12 November 2014 (see message "Proficiency Test on Ethanol started" on this website) when the samples were distributed.

In the PT iis14C10 76 participants from 29 countries have participated.

The participants were requested to determine Acidity , Appearance, Density @ 20°C, Nitrogen, InOrganic Chloride, Sulfate, Total sulfur, Water (coulometric), Water (titrimetric), involatile material content, Copper, phosphorus, Acetone, Acetaldehyde, Acetal, Benzene,Cyclohexane, Crotonaldehyde, DEG, DIOXANE,Ethylacetate, ethanol,, electrical conductivity , Iso Butanol, Iso Propanol,MEG, MEthanol (Fuel-.Bio), n-Amylalcohol, n-Butanol, n-Propanol, Sec-Amylalcohol, sec-Butanol, tert-Amylalcohol, tert-Butanol, and methylalcohol and  tert-butanol.

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).