Analytical Instrumentation

  • Determining the Oxidation Stability of Biodiesel According to EN 14112

Determining the Oxidation Stability of Biodiesel According to EN 14112

Jan 10 2008 Read 12609 Times

The oxidation stability of biodiesel can easily be determined with the 873 Biodiesel Rancimat from Metrohm, a modern and reliable instrument with a 3 years’ warranty. In addition to reliable hardware and easy operation, it offers all the comfort to be expected from a PCcontrolled instrument.

The method: oxidation stability according to EN 14112: The determination of the oxidation stability according to EN 14112 is an accelerated oxidation test. The sample is held in a sealed reaction tube at a constant temperature of 110 °C while a continuous flow of air is passed through the sample. The fatty acid methyl esters (FAME) in the sample are oxidized to peroxides as the primary oxidation products. After some time, the fatty acids are completely decomposed, forming the secondary oxidation products. In addition to volatile organic compounds, these are lowmolecular organic acids, mainly formic and acetic acids. An air flow transports them to a measuring vessel containing distilled water as the absorption solution. Its conductivity is recorded continuously; as soon as volatile carboxylic acids are formed in the sample, this is indicated by an increase in conductivity. The time that elapses until the secondary oxidation products are detected is known as the induction time and is a measure of the oxidation stability of the sample. The measuring setup: The 873 Biodiesel Rancimat has two independent heating blocks allowing a total of eight samples to be analyzed simultaneously. Each measuring position can be started individually. As soon as the measurement has been completed, the measuring position is immediately ready for a new sample, which means that the instrument can be used to its full capacity.

Reader comments

Do you like or dislike what you have read? Why not post a comment to tell others / the manufacturer and our Editor what you think. To leave comments please complete the form below. Providing the content is approved, your comment will be on screen in less than 24 hours. Leaving comments on product information and articles can assist with future editorial and article content. Post questions, thoughts or simply whether you like the content.

Post a Comment





Digital Edition

Petro Industry News September 2020

September 2020

In This Edition Fuel For Thought - DKSH extends partnership with Bruker in China - Will insurers mandate digital ecosystems for energy assets by 2025? - XOS heads to Mars Analytical Inst...

View all digital editions

Events

International Pipeline Expo

Sep 28 2020 VIRTUAL EVENT

Chemistry. Oil & Gas

Sep 29 2020 Minsk, Belarus

OIL Expo

Sep 29 2020 Sosnowiec, Poland

International Energy Week - POSTPONED

Oct 06 2020 Kuching, Malaysia

10th St Petersburg International Gas Forum

Oct 06 2020 St. Petersburg, Russia

View all events