The stableFlex SPME fiber was inserted into bottom for 30 min. Afterward, the absorbed volatiles on SPME were inverstigated by gas chromatography-mass spectrometry (GC-MS) Agilent 6850/HP 5975 equipped a fused silica capillary column (HP-5MS). The oven temperature was stepwise programmed from 50ºC to 260ºC. The spectra analysis was operated in the electron impact (El) mode with and electron energy of 70 ev; mass range (m/z) 30-500 and EM voltage 3000 V. Volatile components were identified using the ChemStation program with NIST 98 library.