A new method was proposed for analysis of the organic compounds in cigarette smoke by high resolution Orbitrap mass spectrometry based on polyacrylonitrile-silica(PAN-SiO_2) nanofiber membrane extraction and methanol elution.Hydrophobic PAN-SiO_2 nanofiber membrane which was used to enrich small molecular organic compounds in cigarette smoke was prepared by the technology of electrospinning.Several parameters including the concentrations of PAN and SiO_2 nanopartical,elecrospining voltage,needle aperture an...