Molecular weight distributions of asphaltenes and deasphaltened oils studied by laser desorption ionization and ion mobility mass spectrometry. Academic Article

abstract

• Laser desorption ionization (LDI) and ion mobility mass spectrometry (IM-MS) are applied to study molecular weight distribution and cross sections of petroleum asphaltene (ASPH) and deasphaltened oils (DAO). Ion mobility data confirmed the presence of gas-phase aggregation in LDI experiments. Most of the molecules with MW > 3000 g/mol in LDI result from gas-phase aggregation. Two-dimensional (2D) IM-MS trend lines are compared with model polymer systems to confirm the order of cross sections (polywax > polystyrene >> DAO > ASPH >> fullerenes), and these data illustrate that ASPH has a more condensed average structure than DAO.

authors

• Russell, David

published proceedings

• Anal Chem

author list (cited authors)

• Becker, C., Qian, K., & Russell, D. H.

citation count

• 58

complete list of authors

• Becker, Chris||Qian, Kuangnan||Russell, David H

publication date

• November 2008

publisher

• American Chemical Society (ACS)  Publisher

published in

• Analytical Chemistry  Journal

keywords

• 0299 Other Physical Sciences
• 0301 Analytical Chemistry
• 0306 Physical Chemistry (incl. Structural)

PubMed Central ID

• 18937419

Digital Object Identifier (DOI)

• 10.1021/ac801473f

start page

• 8592

end page

• 8597

volume

• 80

issue

• 22

URL

• http://dx.doi.org/10.1021/ac801473f