Historical Standard: UOP565-92 Acid Number and Naphthenic Acids by Potentiometric Titration

    SUPERSEDED (see Active link, below)

    Buy Standard (PDF)
    9 pages

    Active (view current version of standard)


    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.

    Citing ASTM Standards
    Back to Top