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 11047 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.
Read comments0

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.


Digital Edition

Petro Industry News November 2018

November 2018

In This Edition Fuel for Thought - VEGA Grieshaber is a TOP innovator in 2018 - Teledyne Technologies acquire Falcon Analytical Systems - Servomex appoints new VP of sales for the Americas...

View all digital editions

Events

Biogas Convention and Trade Fair

Nov 14 2018 Hannover, Germany

OGT EXPO 2018

Nov 20 2018 Ashgabat, Turkmenistan

Ghana Summit Oil, Gas, LNG, Power

Nov 21 2018 Accra, Ghana

AQE 2018

Nov 21 2018 Telford, UK

WWEM 2018

Nov 21 2018 Telford, UK

View all events