IP 182: Determination of inorganic acidity of petroleum products - Colour indicator titration method

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  • Method adopted/last revised: 2006
  • Method reapproved: None
  • REF/ISBN: IP182-2934869
  • Status: Current
  • First printed in STM books: January 2006


This standard specifies a method for determining the water soluble inorganic (strong) acid content of used and unused lubricating oils, fuel oils, and petrolatum.

NOTE 1 - Oils containing additives that can be extracted with water may give erroneous results.

NOTE 2 - The results may not be numerically identical with those obtained when other colour indicators or techniques are used.

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