Structural characterization of asphaltenes enriched in Island and archipelago motifs by LDI (+) FT-ICR MS

Silva L.C.; Davila J.V.; Roque J.V.; Sanches-Neto F.O.; Simas R.C.; Fleming F.P.; Vaz B.G.

Structural characterization of asphaltenes enriched in Island and archipelago motifs by LDI (+) FT-ICR MS

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Artigo

Date

2023

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Brazilian Journal of Chemical Engineering

item.page.citationsscopus

3

Authors

Silva L.C.
Davila J.V.
Roque J.V.
Sanches-Neto F.O.
Simas R.C.
Fleming F.P.
Vaz B.G.

Abstract

© 2023, The Author(s) under exclusive licence to Associação Brasileira de Engenharia Química.Fourier transform ion cyclotron resonance mass spectrometers (FT-ICR MS) play a major role due to their capability to provide information at the molecular level of complex samples. However, asphaltenes deposition in capillaries during ionization hinders the analysis of unstable fractions. To overcome this, in our previous work (10.1016/j.fuel.2022.124418), we demonstrated laser desorption ionization (LDI) as an alternative to FT-ICR MS analysis of unstable asphaltene fractions without the occurrence of any capillary obstructions. Herein, a simplified fractionation methodology for separating asphaltene fractions according to their structural motifs is presented. Then, the asphaltene fractions were characterized by LDI (+) FT-ICR MS. Moreover, structural characterization was also performed Collision-Induced Dissociation (CID) experiments.

item.page.scopussubject

Asphaltene characterization , Asphaltene fractions , Asphaltenes fractionation , Asphaltenes structure , Complex samples , Desorption ionization , Fourier transform ion cyclotron resonance mass spectrometers , Laser desorption , Molecular levels , Structural characterization