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Download the report (iis15F01) of the Proficiency Test on Fuel Oil.

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Summary of this proficiency test:

On 24 March 2015, the proficiency test on Fuel Oil (iis15F01) was finished. The PT started 14 January 2015 (see message “Proficiency Test on Fuel Oil started” on this website) when the samples were distributed.

In this interlaboratory study 215 participants in 75 different countries have participated.

The participants were requested to determine Acid Number, Ash Content, API Gravity,Conradson Carbon Residue, Calc. Carbon Arom. Index, Flash Point PMcc, Heat of Combustion, gross, Heat of Combustion, net, Kinematic viscosity @ 50°C, Kinematic viscosity @ 100°C, Micro Carbon Residue,Pour Point Lower, Pour Point Upper,Pour Point automated, Sediments by extraction, Potential total sediment, Accelerated total sediment, Total Sulphur Content, Nitrogen, Water by distillation,water and Sediment, Al, Ni, K, Si, Na, V, Distillation , Total Carbon, Total Hydrogen, Total Nitrogen, Density at 15°C,Ash Content, Asphaltenes, Fe, Ca, P, Zn, Sum Aluminium / Silicon and Bromine Number.

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).