2.2.4.2. Chromatographic analysis. The analysis of fatty acid methyl
esters (FAME) was performed on a gas chromatograph Shimadzu
GC-2010 with MS-QP2010 Plus detector (quadrupole, electron
impact) and autoinjector AOC-5000. Separation of FAME was performed
using Column RTX (Restek, polydimethylsiloxane) with
30 m of length, 0.25 mm of internal diameter and 0.2 mm of film
thickness. Analytical conditions were: column oven temperature of
140 C, injection temperature of 260 C and column flow (Helium)
of 0.4 mL/min. The volume injected was 0.1 mL. Identification of the
peaks was performed by comparison with the retention time of
standard 37 FAME mix with known concentrations of each
(Supelco, USA) and mass spectra (ratio m/z) e compared to internal
database. FAME were quantified by comparison with the peak areas
of the standards, and results expressed in g/100 g of total fatty
acids.