Proficiency Test on Hydraulic Oil finished

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Download the report (iis12L03) of this Proficiency Test on used Hydraulic Oil

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Summary of this proficiency test:

On 24 January 2013, the proficiency test on used Hydraulic Oil (iis12L03) was finished. It started on 24 October 2012 (see message “Proficiency Test on Hydraulic Oil started” on this website) when the samples were distributed.

In this interlaboratory study 43 participants in 27 different countries have participated.

The participants were requested to determine Total Acid Number, Density @ 15°C, Flash Point PMcc, Kinematic viscosity @ 40°C, Kinematic viscosity @ 100°C, Water, Al, Ba, Cr, Cu, Fe, Pb, Li, Mg, Mn, Mo, Ni, Na, Si, Ag, Sn, Ti, V, Ca, P and Zn.

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).