Injector temperature
was 250 C with the detector at 250 C (Kimura et al., 2004).
The oven temperature was kept at 100 C for 2 min and increased
to 230 C at a rate of 4 C per min. and kept at 230 C for 3 min.
Helium was used as a carrier gas at a flow rate of 34 cm s1. The
injection volume was 1 lL with a split ratio of 25:1. Calibration
of the instrument was done using a 14-component FAMEs standard
mixture (C8-C24) (Sigma–Aldrich Supelco 18919-1AMP) with
margaric acid standard as an internal standard. The mass fragmentation
patterns were compared with spectral data from the Wiley
and NIST libraries. Library searches were performed using Wiley
Registry 9th Edition and Mass Spectral Library 08 MS Search an
AMDIS V.2.0 for NIST.