The full report can be downloaded (as .pdf-file). To download the report, please click the right mouse button and choose the "save as" option.

Download the report (iis09C11X) of this Proficiency Test on MEG.

For viewing the report you will need Adobe Acrobat Reader

Summary of this proficiency test:

On 18 December 2009, the proficiency test on MEG (iis09C11) was finished. It started on 30 September 2009 (see message “Proficiency Test on MEG started” on this website) when the samples were distributed.

In this international interlaboratory study 65 participants in 26 different countries have participated.

The participants were requested to determine Acidity, Aldehydes, Appearance, Chloride, Colour (D5386), Colour Pt/Co (D1209) and Diethylene Glycol on sample #0972. On sample #0973 was requested to determine UV Transmittance (at 350, 275, 250 and 220 nm) and Water. Sample #0974 was for Iron only. On sample #0975 was requested to determine Ash, Purity, Density @ 20°C, Specific Gravity @ 20/20°C and Distillation (Initial Boiling Point, 50%recovered and Dry Point).

The proficiency test report summarises per test, the test results, the analytical methods reported by the participants and the z-scores calculated by i.i.s. 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).

Interested parties can order a hard copy of the report; the price for non-participants is Euro 35.