High resolution tandem mass spectrometry has been applied to obtain the structure information of petroleumsamples. Here, we report a mefflod for structural characterization of crude oil molecules by the collision-indu...High resolution tandem mass spectrometry has been applied to obtain the structure information of petroleumsamples. Here, we report a mefflod for structural characterization of crude oil molecules by the collision-induced dissocia-tion （CID） technology coupled wiffl the high-field Fourier transform ion cyclotron resonmlce mass spectrometry （FT-ICRMS）. The ion isolation window was narrowed down to 1 Da to distinguish file complex homologues contained in petroleum.Aromatic model compounds and crude oil samples were measured by CID FT-ICR MS at different collision energy levels.The fragmentation of model compounds wiffl alkyl side-chains was found to be related to the size of file aromatic rings. Thefragmentation of model compounds wiffl archipelago structures depended on file lengffl of file bridge alkylene chain. Theprevalent reaction pafflway of model compounds with naphthenic rings was mainly determined by the position of naphfflen-ic rings in file molecules. On file basis of file fragmentation pathways, the structure differences of two crude oils were recog-nized as different content of naphthenic rings by CID technology with 1 Da isolation window. The NMR analysis was alsoapplied to confirm file CID results. This study exhibits the great potential of CID FT-ICR MS wiffl narrow isolation windowin file smlctural characterization of crude oil molecules.展开更多
基金supported by the Key Laboratory of SINOPEC (KL17010)the research project of Research Institute of Petroleum Processing(R16075)
文摘High resolution tandem mass spectrometry has been applied to obtain the structure information of petroleumsamples. Here, we report a mefflod for structural characterization of crude oil molecules by the collision-induced dissocia-tion （CID） technology coupled wiffl the high-field Fourier transform ion cyclotron resonmlce mass spectrometry （FT-ICRMS）. The ion isolation window was narrowed down to 1 Da to distinguish file complex homologues contained in petroleum.Aromatic model compounds and crude oil samples were measured by CID FT-ICR MS at different collision energy levels.The fragmentation of model compounds wiffl alkyl side-chains was found to be related to the size of file aromatic rings. Thefragmentation of model compounds wiffl archipelago structures depended on file lengffl of file bridge alkylene chain. Theprevalent reaction pafflway of model compounds with naphthenic rings was mainly determined by the position of naphfflen-ic rings in file molecules. On file basis of file fragmentation pathways, the structure differences of two crude oils were recog-nized as different content of naphthenic rings by CID technology with 1 Da isolation window. The NMR analysis was alsoapplied to confirm file CID results. This study exhibits the great potential of CID FT-ICR MS wiffl narrow isolation windowin file smlctural characterization of crude oil molecules.
