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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.
1.1 This test method covers the determination of the stability of gasoline in finished form only, under accelerated oxidation conditions. (Warning
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.
1.4 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.
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 StandardsPart IV— 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 Number Code 75.160.20 (Liquid fuels)
UNSPSC Code 15101506(Gasoline or Petrol)
ASTM D525-12a, Standard Test Method for Oxidation Stability of Gasoline (Induction Period Method), ASTM International, West Conshohocken, PA, 2012, www.astm.orgBack to Top