Proficiency Test on Liquefied Butane started

The letter of instructions can be downloaded  here as a pdf document. To download a document, please click the right mouse button and choose the "save as" option.

Download the instuctions for iis17S02B here: The letter of instructions and the report form here.

Summary of this proficiency test:

On 31 May 2017 the proficiency test on Liquefied Butane starts with 52 participants from 30 different countries.

On that date, the sample will be dispatched to the laboratories. Enclosed to the sample is the material safety data sheet (MSDS).

Please confirm sample receipt as soon as you have received and checked the contents of the sample package via Please enter the date of receipt and press the "save date" button.

The sample can be analyzed on: Propane, n-Butane, 1,3-Butadiene, iso-Butene, 1-Butene, trans-2-Butene, cis-2-Butene, iso-Pentane, iso-Butane, Propene, Molar Mass, Relative Density at 60/60F, MON, Vapour pressure at 40°C and Vapour pressure at 100F.

The deadline for reporting results is set on 7 July 2017. A laboratory that reports test results after the deadline will definitely not get direct feedback in case any of its results are suspect! So be in good time to get the most out of this proficiency test.

The test results should be reported via our internet based results reporting platform. A login and a password can be requested via email to