IP 13: Petroleum products - Determination of carbon residue - Conradson method

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  • Method adopted/last revised: 1994
  • Method reapproved: 2014
  • REF/ISBN: IP013-2936900
  • Status: Current
  • First printed in STM books: April 1994

Scop

This International Standard specifies a method for determining the amount of carbon residue, in the range of 0,01 % (m/m) to 30.0 % (m/m), left after evaporation and pyrolysis of an oil, and is intended to provide some indication of relative coke-forming tendency. The method is generally applicable to relatively non-volatile petroleum products which partially decompose on distillation at atmospheric pressure. Petroleum products containing ash-forming constituents as determined by IS0 6245 will exhibit an erroneously high carbon residue, depending upon the amount of ash formed.

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