Standard Test Methods for Oxidation Onset Temperature of Hydrocarbons by Differential Scanning Calorimetry

Importancia y uso:

5.1 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 (e.g., 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 E1858). The presence or effectiveness of antioxidants may be determined by these test methods.

FIG. 1 DSC Oxidation (Extrapolated) Onset Temperature (OOT)

5.2 Typical uses of these test methods include the oxidative stability of edible oils and fats (oxidative rancidity), lubricants, greases, and polyolefins.

Subcomité:

E37.01

Referida por:

E2744-21, E0537-24

Volúmen:

14.01

Número ICS:

17.200.10 (Heat. Calorimetry)

Palabras clave:

differential scanning calorimetry; differential thermal analysis; hydrocarbons; oxidation; oxidation induction time (OIT); oxidation onset temperature (OOT); oxidative stability; pressure differential scanning calorimetry;