Proficiency Test on MTBE finished
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 (iis12C01) of this Proficiency Test on MTBE For viewing the report you will need Adobe Acrobat Reader
Summary of this proficiency test: On 24 April 2012, the proficiency test on MTBE (iis12C01) was finished. It started on 1 February 2012 (see message “Proficiency Test on MTBE started” on this website) when the samples were distributed. In this international interlaboratory study 20 participants in 14 different countries have participated on MTBE. The participants were requested to determine: The MTBE samples have to be analyzed on: Appearance, Water, Carbonyls, Refractive index, Density @15C, Purity, Purity on dry basis and some GC- impurities: Diisobutylenes, Methanol, t-Butylalcohol, C4-, C5- and Other hydrocarbons.
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. |