On-Line Liquid Chromatography/Mass Spectrometry for Heavy Hydrocarbon Characterization+

There are many advantages of using on-line liquid chromatography/mass spectrometry (LC /MS) to characterize complex mixtures. By incorporating low-voltage electron-impact ionization/high-resolution MS with moving belt LC/MS, differentiation can be made between naphthenoaromatics and alkylaromatics and between aromatic hydrocarbons and «difficult-to-resolve» thiophenes. Alternative on-line LC/MS techniques for heavy hydrocarbon characterization are also discussed