Comprehensive two dimensional gas chromatography and time-of-flight mass spectrometry of hydrocarbon in crude oil：application of inverse column set

Petroleum hydrocarbons,which span a wide range of boiling point and polarity,are very complicated.The comprehensive two dimensional gas chromatography and time-of-flight mass spectrometry is one of the most effective methods to separate complex mixtures.An inverse column set was used to analyze petroleum hydrocarbons,and to distinguish some critical compounds,providing data for the comprehensive two dimensional gas chromatography and time-of-flight mass spectrometry of hydrocarbons in crude oil.It was concluded that,the inverse column set worked perfectly in separating two dimensionally the saturated hydrocarbons,especially isoalkane and cyclane with low molecular weight.It could be used to distinguish the UCMs (unresolved complex mixtures) from saturated hydrocarbons of biodegradation oil.