• Method adopted/last revised:
• Method reapproved: None
• REF/ISBN:
• Status: Current
• First printed in STM books: February 2013

This standard specifies procedures for determining the aromatic carbon content  of mineral base oils within the range of 0,6 % mole to 13,8 % mole, and of middle distillates within the range of 1,8 % mole  to  41,5  %  mole.  The  standard  does  not determine the concentration of aromatic carbon in these materials, but only measures the sum of the aromatic  substructures.  In  ¹³C   nuclear  magnetic resonance spectroscopy, no distinction can be made between olefinic and aromatic carbons,  and thus this standard is not applicable to petroleum fractions with significant quantities of olefinic compounds.