IP 368: Determination of hydrocarbon types in lubricating oil basestocks - Preparative high performance liquid chromatography method

Document options


EI Technical Partners get free access to publications. You will need to Login or Register here

  • Method adopted/last revised: 2001
  • Method reapproved: 2006
  • REF/ISBN: IP368-2936900
  • Status: Current
  • First printed in STM books: April 2001

Scope

This method covers the separation and determination of representative saturated and aromatic components in lubricating oil basestocks that boil above 270 °C. All compounds that are more polar than saturates, including those that contain sulphur, nitrogen or oxygen, are determined as aromatics. Brightstocks may give low recoveries. This method may be applied to gas oils boiling in the range 200 °C to 350 °C by substituting pentane for hexane at all places in the text. Care is required during the solvent removal stage to minimise the loss of volatile sample components and maximise the sample recovery which should be greater than 95 % (m/m). Saturates [%/(m/m)] and aromatics [%(m/m)] should both be determined by gravimetry and the results normalized to 100 %. Report saturates, aromatics and recovery to the nearest 1 % (m/m).

Members Benefits

Are you an EI Member? If yes, register/log in now to ensure you receive free access or discounts to EI publications. How to do this:

1. Sign up/register with this site.

2. Log in

3. Link your membership details to your profile, on your profile page.

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.