2.2. Gas chromatography analysis
Analysis was carried on a varian-gas chromatograph equipped
with a flame ionization detector and a BPI (100% dimethyl polysiloxane)
capillary column. Helium at a flow rate of 1.0 ml min1 and
8 psi inlet pressure was employed as a carrier gas. Temperature
was programmed from 60 to 220 C at 5 C min1 with a final hold
time of 6 min .The injector and detector temperatures were maintained
at 250 and 300 C, respectively. The sample (0.2 ll) was injected
with 1:20 split ratio.