The chromatographic assay was carried out using a ThermoFinnigan
Trace-GC-Ultra gas chromatographer equipped with a flame
ionization detector (FID) and a BPX-70 fused-silica capillary column
(120 m, 0.25 mm i.d.). The operation parameters established after the
verification of the best resolution conditions were injector and detector
temperatures of 250 °C and 280 °C, respectively