Determination of molecular masses for petroleum distillates by simulated distillation

  • Lante Carbognani University of Calgary.
  • Lina Díaz Gómez University of Calgary.
  • Thomas B. P. Oldenburg University of Calgary.
  • Pedro Pereira Almao University of Calgary.
Keywords: Molecular mass determination, Simulated distillation, Petroleum distillates, ndM, Mass spectrometry.


Determination of Molecular Mass (MM) for petroleum distillates is explored for selected samples via
High Temperature Simulated Distillation (HTSD). MM is determined as a by-product from routine
HTSD carried out using open wall capillary columns coated with apolar stationary phases. No sample
pre-separation into hydrocarbon group-types is required. Determined MM values were validated with results
achieved via correlations based on specific gravity and refractive index. Furthermore, determined MM with
the former methodologies were found to match mass spectrometric determinations carried out for the basic
polar components present within the studied samples. Moreover, HTSD analyzed petroleum distillates are
proposed as more representative calibration standards for size exclusion chromatographic separations, thus
opening the feasibility of extrapolating MM determination for non volatile petroleum residua.


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How to Cite
Carbognani, L., Díaz Gómez, L., Oldenburg, T. B. P., & Pereira Almao, P. (2012). Determination of molecular masses for petroleum distillates by simulated distillation. CT&F - Ciencia, Tecnología Y Futuro, 4(5), 43-55.


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