ASTM D525 - 12a

    Standard Test Method for Oxidation Stability of Gasoline (Induction Period Method)

    Active Standard ASTM D525 | Developed by Subcommittee: D02.14

    Book of Standards Volume: 05.01


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    Significance and Use

    The induction period may be used as an indication of the tendency of motor gasoline to form gum in storage. It should be recognized, however, that its correlation with the formation of gum in storage may vary markedly under different storage conditions and with different gasolines.

    1. Scope

    1.1 This test method covers the determination of the stability of gasoline in finished form only, under accelerated oxidation conditions. (WarningThis test method is not intended for determining the stability of gasoline components, particularly those with a high percentage of low boiling unsaturated compounds, as these may cause explosive conditions within the apparatus. However, because of the unknown nature of certain samples, the pressure vessel assembly shall include a safety burst-disc in order to safeguard the operator.)

    Note 1—For measurement of oxidation stability of gasoline by measurement of potential gum, refer to Test Method D873, or IP Test Method 138.

    Note 2—The precision data were developed with gasolines derived from hydrocarbon sources only without oxygenates.

    1.2 The accepted SI unit of pressure is the kilo Pascal (kPa), and of temperature is °C.

    1.3 WARNINGMercury has been designated by many regulatory agencies as a hazardous material that can cause central nervous system, kidney and liver damage. Mercury, or its vapor, may be hazardous to health and corrosive to materials. Caution should be taken when handling mercury and mercury containing products. See the applicable product Material Safety Data Sheet (MSDS) for details and EPAs websitehttp://www.epa.gov/mercury/faq.htmfor additional information. Users should be aware that selling mercury and/or mercury containing products into your state or country may be prohibited by law.

    1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    D873 Test Method for Oxidation Stability of Aviation Fuels (Potential Residue Method)

    D4057 Practice for Manual Sampling of Petroleum and Petroleum Products

    E1 Specification for ASTM Liquid-in-Glass Thermometers

    Energy Institute Standards

    PartIV— Petroleum and its Products A convenient template for measuring the breakpoint is described in the paper by Korb, E. L., Induction Period Calculator, ASTM Bulletin, No. 153, August 1948, pp. 99-102.


    ICS Code

    ICS Number Code 75.160.20 (Liquid fuels)

    UNSPSC Code

    UNSPSC Code 15101506(Gasoline or Petrol)


    DOI: 10.1520/D0525-12A

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