UOP565-92

    Acid Number and Naphthenic Acids by Potentiometric Titration


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    1. Scope

    This method is for determining the acid number of petroleum products, petroleum distillates, and other chemicals by potentiometric titration. Inorganic acids, organic acids, mercaptans and thiophenols respond to this analysis, but their respective salts do not; a procedure is also included for sodium naphthenate salts. The typical range for acid number detection is 0.002 to 5 mg KOH/g of sample, although higher levels can be accommodated.


    Citation Format

    ASTM UOP565-92, Acid Number and Naphthenic Acids by Potentiometric Titration, ASTM International, West Conshohocken, PA, 2002, www.astm.org

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