Important notice: Website update - 21st of January 2025
We're merging our website with our main site and to offer a more streamlined experience. To make the switch smooth, this website will be unavailable for maintenance today. This means you won't be able to purchase publications. Don't worry, everything will be available on the new site by the end of the day. To avoid any hiccups, we recommend holding off on purchases until then. Thank you for your patience, and see you on the new site soon!
IP 499: Determination of aromatic carbon content of lubricant mineral base oils and middle distillate petroleum fractions - Carbon-13 nuclear magnetic resonance (NMR) spectroscopy method
- 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.
Members Benefits
Are you an EI Member? If yes, register/log in now to ensure you receive free access or discounts to EI publications.
If you are not a Member, why not join today and receive all of the benefits of EI Membership? EI Members are entitled to a 25% discount on most EI publications.