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Description / Abstract:
This method is primarily applicable to additive-free lubricating oil
base-stocks. A carbon-type
analysis is obtained in terms of % C, % CN and % Cp, being the
percentages of the total number of
carbon atoms in aromatic, napthenic, and paraffinic structures
respectively.
This method is limited to the ranges:
CA 3 % - 25 %
Cp 43 % - 72 %
This method may also be utilized with additive containing oils
providing it is recognized that the
figures obtained will be modified by the type and quantity of additive
present.