GC-MS analysis was performed in electron impact moed (EI, 70 eV) with a Shimadzu QP5050A System, using the same temperature, with He as the carrier gas (1 mL/min) and a capillary column (BP-5) supplied by SGE, Australia (30 m × 32 mm i.d.,o.25 film thickness). For each analysis, programmed-temperature Kovats retention indices (RI) were obtained by analysis of the oil spiked with an n-alkane mixture containing each homologue from n-C8 to n-C30.