Click here to go back to the previous page


2021 Proficiency Test (PT) on Biodiesel B100 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 iis21G07 here: the letter of instructions

Download the instuctions for iis21G07CN here: letter of instructions for CN

Download the instuctions for iis21G07M here: letter of instructions for Metals

Download the instuctions for iis21G07TC here: letter of instructions for Total Contamination


Summary of this proficiency test:


On 28 September 2021 the proficiency test on Biodiesel B100 started with 58 participants from 29 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: Acid Value, Acid Number, Cloud Point, CFPP, Carbon Residue, Copper Corrosion, Density at 15ºC, Flash Point (PMcc/recc), Iodine Value, Kinematic Viscosity at 40ºC, Oxidation Stability, Pour Point, Sulfated Ash, Sulfur, Water, Water and Sediment, Distillation performed at 10mmHg, Heating Values, Methanol, Monoglycerides, Diglycerides, Triglycerides, Free Glycerol, Total Glycerol, Total Ester Content, Linolenic Acid Methyl Ester, Polyunsaturated Methyl Esters, Sum of Calcium and Magnesium, Phosphorus, Potassium, Sodium, Sum of Potassium and Sodium, Total Contamination. 


The deadline for reporting results is set on 5 November 2021. 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





©1996-2020 Institute for Interlaboratory Studies