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2023 Proficiency Test (PT) on Biogasoline E10 started


The letter of instructions can be downloaded here as a pdf document. To download a document, please click the right mouse button and choose the "save as" option.


Please download the instructions for the PT iis23B04 here: the letter of instructions and the report form here

Download the instuctions for iis23B04DVPE here: letter of instructions for DVPE and the report form here

Download the instuctions for iis23B04RON here: letter of instructions for RON/MON and the report form here


Summary of this proficiency test:


On 24 May 2023 the proficiency test on Biogasoline E10 started with 46 participants from 20 different countries. On that date, the samples were dispatched to the laboratories. Enclosed to the sample is the material safety data sheet (MSDS).

Please confirm sample receipt as soon as you have received and checked the contents of the sample package via Please enter the date of receipt and press the "save date" button.


The samples can be analyzed on: API Gravity, Aromatics, Benzene, Copper Strip 3hrs at 50°C, Density at 15°C, Distillation, Doctor test, Existent gum, Pb, Mn, Mercaptan Sulfhur, Olefins, Oxidation Stability, Oxygenates, Oxygen Content, Sulfur, Total Vapour Pressure, DVPE and RON/MON.  


The deadline for reporting results is set on 30 June 2023. A laboratory that reports test results after the deadline will definitely not get direct feedback in case any of its results are suspect! So be in good time to get the most out of this proficiency test.

The test results should be reported via our internet based results reporting platform A login and a password can be requested via email to





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