IP 271: Determination of barium content of lubricating oil additive concentrates - Sulfuric and nitric acid oxidation method

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  • Method adopted/last revised: 1970
  • Method reapproved: 2004
  • REF/ISBN: IP271-2936900
  • Status: Current
  • First printed in STM books: April 2004

Scope

This method describes a rapid procedure for the determination of barium in lubricating oil additive concentrates, containing not less than 2% barium, providing that other metals which form insoluble sulphates, e.g. lead, are absent. Calcium at similar concentrations to the barium does not interfere.

(Originally published: 1970, reapproved 2004. This method is scheduled to be withdrawn in 2016.)

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