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Standard Test Method for Oxidation Onset Temperature of Hydrocarbons by Differential Scanning Calorimetry
Automaticky preložený názov:
Štandardná skúšobná metóda pre oxidačné teplotou nástupu uhľovodíkov diferenčnej skenovacej kalorimetrie
NORMA vydaná dňa 10.12.2002
Označenie normy: ASTM E2009-02
Poznámka: NEPLATNÁ
Dátum vydania normy: 10.12.2002
Kód tovaru: NS-43938
Počet strán: 5
Približná hmotnosť: 15 g (0.03 libier)
Krajina: Americká technická norma
Kategória: Technické normy ASTM
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)
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). The presence or effectiveness of antioxidants may be determined by this test method. Typical uses of this test method include the oxidative stability of edible oils and fats (oxidative rancidity), lubricants, greases, and polyolefins.
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1. 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. |
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2. Referenced Documents | ||||||||||||||||
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