A SPE/GC-MS method for separation and determination of carbazoles in crude oil was developed.Alumina and silicic acid solid-phase extraction(SPE) columns were used to separate resin from crude oil and neutral nitrogen...A SPE/GC-MS method for separation and determination of carbazoles in crude oil was developed.Alumina and silicic acid solid-phase extraction(SPE) columns were used to separate resin from crude oil and neutral nitrogen compounds from nitrogen riched resin.Carbazole and its alkylation series were quantitatively analysed by use of deuterate carbazole as an internal standard and the 9-benzocarbazole as an recovery rate standard.The modified method was very suitable for batch processing in organic geochemistry owing to its low cost,time saving,environmental friendliness.展开更多
A data processing combination of manual and automatic steps for mass peaks identification of a coking gas oil was illustrated.Some representative compounds were identified by manual process.A program was performed to ...A data processing combination of manual and automatic steps for mass peaks identification of a coking gas oil was illustrated.Some representative compounds were identified by manual process.A program was performed to search the various types with the same hetero-atoms(familes-class,NnSsOo)but different rings plus double bonds(R+DB)value(Z in CcH2c+ZNnOoSs),then,alkylation series of each types were revealed by multiplying each mass by 14.00000 in Kendrick mass scale.Finally,isotope groups of each identified peaks were picked up respectively.The method is appropriate to the data analysis of FT-ICR MS spectra with a poor mass accuracy.展开更多
文摘A SPE/GC-MS method for separation and determination of carbazoles in crude oil was developed.Alumina and silicic acid solid-phase extraction(SPE) columns were used to separate resin from crude oil and neutral nitrogen compounds from nitrogen riched resin.Carbazole and its alkylation series were quantitatively analysed by use of deuterate carbazole as an internal standard and the 9-benzocarbazole as an recovery rate standard.The modified method was very suitable for batch processing in organic geochemistry owing to its low cost,time saving,environmental friendliness.
文摘A data processing combination of manual and automatic steps for mass peaks identification of a coking gas oil was illustrated.Some representative compounds were identified by manual process.A program was performed to search the various types with the same hetero-atoms(familes-class,NnSsOo)but different rings plus double bonds(R+DB)value(Z in CcH2c+ZNnOoSs),then,alkylation series of each types were revealed by multiplying each mass by 14.00000 in Kendrick mass scale.Finally,isotope groups of each identified peaks were picked up respectively.The method is appropriate to the data analysis of FT-ICR MS spectra with a poor mass accuracy.
