The analysis of the essential oils was performed using a Hewlett Packard 5890 II GC, equipped with a HP- 5MS (Crosslinked 5% PH ME Siloxane) capillary column (30 m, 0.25 mm i.d., 0.25 mm film thickness) and a mass spectrometer 5972 as detector. The carrier gas was helium, by a rate of 1ml/min. Column temperature was initially kept for 3min at 401C, then gradually increased to 1801C at a 31C/min rate and finally increased to 2701C at 301C/min and held for 5min. For GC-MS detection an electron ionization system was used with ionization energy of 70eV. Injector and detector (MS transfer line) temperatures were set at 2201C and 2901C, respectively. Diluted samples of 0.5 ml were injected manually and splitless.
The analysis of the essential oils was performed using a Hewlett Packard 5890 II GC, equipped with a HP- 5MS (Crosslinked 5% PH ME Siloxane) capillary column (30 m, 0.25 mm i.d., 0.25 mm film thickness) and a mass spectrometer 5972 as detector. The carrier gas was helium, by a rate of 1ml/min. Column temperature was initially kept for 3min at 401C, then gradually increased to 1801C at a 31C/min rate and finally increased to 2701C at 301C/min and held for 5min. For GC-MS detection an electron ionization system was used with ionization energy of 70eV. Injector and detector (MS transfer line) temperatures were set at 2201C and 2901C, respectively. Diluted samples of 0.5 ml were injected manually and splitless.
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