| A reliable characterization of fatty acid
methyl esters (FAME) is essential for an accurate calculation of the
cetane index of biodiesel. EN 14103
is a standard method for determination of esters and linolenic
acid methyl ester and can be applied to biodiesel analysis. EN 14103
requires GC analysis with a split/splitless (SSL) or a programmable
temperature vaporizing (PTV) injector and a wax column for a detailed
separation of FAMEs.
This application note discusses the use of
the Thermo Scientific TRACE GC
UltraTM to provide
verification that the ester content in B100 biodiesel is greater than
96.5% m/m and the linolenic acid methyl ester content is lower than 12%
m/m, in accordance with the specifications reported in EN 14214:2003,
while also allowing the characterization of FAME composition. This
determination can be achieved in a highly repeatable and reliable fashion
using the TRACE GC Ultra equipped with a PTV backflush inlet and FID
detector, and automated by the Thermo Scientific
TriPlusTM
liquid autosampler, in full compliance with method EN
14103. The backflush device preserves column performance without
affecting
the determination of total FAME. |
|
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