The GC-MS was operated under the
following conditions; column temperature was initially held
at 60 曟 for 5 min with injection volume of 1 毺L and then
programmed to rise at the rate of 5 曟 per min to 250 曟. The
injector temperature was set at 200 曟 while the detector
(mass spectrophotometer) temperature was maintained
at 250 曟.