Oxidation Stability of Fatty Acid Methyl Esters (FAME) and
Vegetable Oils as per EN 14112
What are fatty acid methyl esters (FAME)?
Fatty acid methyl esters are usually obtained from oil seeds.
During manufacture the vegetable oil is transesterified with
methanol. This produces the methyl esters of the fatty acids
present in the oil with glycerol as a byproduct.
Quality criterion for biodiesel and vegetable oils
Vegetable oils and fatty acid methyl esters have a relatively
short storage life as they are slowly oxidized
by atmospheric oxygen. The resulting oxidation products
can damage vehicle motors. For this reason the oxidation
stability is an important quality criterion for biodiesel
and vegetable oils and must therefore be checked regularly
during manufacture and storage. With the 873
Biodiesel Rancimat this determination can be carried out
simply and reliably. The addition of suitable antioxidants
slows down the oxidation process. The effectiveness of antioxidants
can also be determined with the 873 Biodiesel Rancimat.
Oxidation stability measurement by Metrohm
The 873 Biodiesel Rancimat is a modern, PC-controlled instrument
for the convenient determination of the oxidation stability
of oils and fats. The temperature can be set very accurately
and reproducibly by using the GLP Set with certified temperature
sensor; this further improves the precision of the results.
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