|Proficiency Test on
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Summary of this proficiency test:
On 10 January 2013, the proficiency test on biodiesel B100 (iis12G05) was finished. It started on 19 September 2012 (see message “Proficiency Test on biodiesel B100 started” on this website) when the samples were distributed.
In this interlaboratory study 48 participants in 23 countries have participated.
The participants were requested to determine Acid Number, Acid Value, Carbon Residue, CFPP, Copper Strip Corr. 3h/50ºC, Density @15ºC, Flash Point , Iodine number, KinematicViscosity @ 40 ºC, Oxidation Stability, Sulphur, Sulphated Ash, Water , Calcium, Magnesium, Phosphorus , Potassium, Sodium, Methanol, Glycerides, Glycerol and Total Ester content and Total contamination.
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, DIN, ASTM).