Multielement molecular size fractionation in crude oil and oil residue by size exclusion microchromatography with high resolution inductively coupled plasma mass spectrometric detection (HR ICP MS)

Pawel Pohl (1, 2) , Justyna Dural (3) , Nopparat Vorapalawut (4) , Isabelle Merdrignac (5) , Charles Philippe Lienemann (5) , Hervé Carrier (6) , Bruno Grassl (2) , Brice Bouyssière (2) , Ryszard Lobinski (3, 2)

1 Faculty of Chemistry
2 IPREM - Institut des sciences analytiques et de physico-chimie pour l'environnement et les materiaux
3 Faculty of Chemistry
4 Faculty of Science
5 IFPEN - IFP Energies nouvelles
6 TEFC - Thermodynamique et Energétique des fluides complexes

Microchromatography using permeation through gels with the increasing exclusion limit (5000, 400000 and 20000000 Da) was combined with high resolution (R = 4000) ICP MS to measure the distribution of Co, Cr, Fe, Ni, S, Si, V and Zn as a function of the molecular mass fraction of crude oil and oil vacuum distillation residue. The accuracy of the simultaneous multielement determination was verified by the flow-injection-ICP MS analysis of certified reference materials (wear-metals in lubricating oils: SRM 1084a and SRM 1085b). The method allowed the acquisition of chromatograms with high sensitivity competitive existing methods, showing element- and sample origin-dependent morphology.

Mots clés: Oil residues; Size exclusion; Crude oil; Inductively coupled plasma Engineering main heading: Mass spectrometers; HR-ICP-MS; Mass spectrometric detection; Microchromatography; Molecular mass fractions; Molecular size fractionation; Multielement determination

Domaines: Chimie-Physique [physics.chem-ph]

Pawel Pohl, Justyna Dural, Nopparat Vorapalawut, Isabelle Merdrignac, Charles Philippe Lienemann, et al.. Multielement molecular size fractionation in crude oil and oil residue by size exclusion microchromatography with high resolution inductively coupled plasma mass spectrometric detection (HR ICP MS). Journal of Analytical Atomic Spectrometry, 2010, 25 (12), pp.1974-1977. ⟨10.1039/c0ja00076k⟩. ⟨hal-00686574⟩