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EI 346

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Determination of polycyclic aromatics in unused lubricating base oils and asphaltene free petroleum fractions - Dimethyl sulphoxide extraction refractive index method
The Energy Institute / 1992 / 4 pages

Scope

This method specifies the determination of polycyclic aromatics (PCA) over the concentration range 1-15 mass % in unused additive free lubricating base oils having an atmospheric boiling point of 300°C minimum at 5% recovered sample. This method may apply to PCA concentrations outside this range and to other asphaltene-free petroleum fractions, but the precision has not been determined.

(Reapproved 2004)





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