ASTM-E2009 › Historical Revision Information
Standard Test Method for Oxidation Onset Temperature of Hydrocarbons by Differential Scanning Calorimetry
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Scope
1.1 This test method describes the determination of the oxidative properties of hydrocarbons by differential scanning calorimetry or pressure differential scanning calorimetry under linear heating rate conditions and is applicable to hydrocarbons, which oxidize exothermically in their analyzed form.
1.2 Computer or electronic-based instruments, techniques, or data treatment equivalent to this test method may also be used.
Note 1—Users of this test method are expressly advised that all such instruments or techniques may not be equivalent. It is the responsibility of the user of this standard to determine the necessary equivalency prior to use.
1.3 Test Method A— A differential scanning calorimeter (DSC) is used at ambient pressure, of one atmosphere of oxygen.
1.4 Test Method B—A pressure DSC (PDSC) is used at high pressure, for example, 3.5 MPa (500 psig) oxygen.
1.5 Test Method C—A differential scanning calorimeter (DSC) is used at ambient pressure of one atmosphere of air.
1.6 SI units are the standard.
1.7 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.
Significance and Use
Oxidation onset temperature is a relative measure of the degree of oxidative stability of the material evaluated at a given heating rate and oxidative environment, for example, oxygen; the higher the OOT value the more stable the material. The OOT is described in Fig. 1. The OOT values can be used for comparative purposes and are not an absolute measurement, like the oxidation induction time (OIT) at a constant temperature (see Test Method E 1858
Typical uses of this test method include the oxidative stability of edible oils and fats (oxidative rancidity), lubricants, greases, and polyolefins.
FIG. 1 DSC Oxidation Onset Temperature (OOT), Extrapolated Onset Temperature
Keywords
differential scanning calorimetry; differential thermal analysis; hydrocarbons; oxidation; oxidation induction time (OIT); oxidation onset temperature (OOT); oxidative stability; pressure differential scanning calorimetry; ICS Number Code 17.200.10 (Heat. Calorimetry)
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Document Number
ASTM-E2009-02
Revision Level
2002 EDITION
Status
Superseded
Modification Type
Revision
Publication Date
Dec. 10, 2002
Document Type
Test Method
Page Count
5 pages
Committee Number
E37.01