(812) 309-78-59
(495) 223-46-76
ASTM E1858-08(2015)e1
Standard Test Methods for Determining Oxidation Induction Time of Hydrocarbons by Differential Scanning Calorimetry
6 стр.
Заменен
Электронный (pdf)Печатное издание
106.08 $ (включая НДС 20%)
Разработчик:
Зарубежные/ASTM
ICS:
71.080.01 Organic chemicals in general / Органические химические вещества в целом
Сборник (ASTM):
14.01 Healthcare Informatics / Информатика в области здравоохранения
Тематика:
Thermal Analysis
Описание
Значение и использование

5.1 Oxidative induction time is a relative measure of the degree of oxidative stability of the material evaluated at the isothermal temperature of the test. The presence, quantity or effectiveness of antioxidants may be determined by this method. The OIT values thus obtained may be compared from one hydrocarbon to another or to a reference material to obtain relative oxidative stability information.

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

Область применения

1.1 These test methods describe the determination of the oxidative properties of hydrocarbons by differential scanning calorimetry or pressure differential scanning calorimetry and is applicable to hydrocarbons that oxidize exothermically in their analyzed form.

1.2 Test Method A—A differential scanning calorimeter (DSC) is used at ambient pressure, for example, about 100 kPa of oxygen.

1.3 Test Method B—A pressure DSC (PDSC) is used at high pressure, for example, 3.5 MPa (500 psig) oxygen.

1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.5 These test methods are related to ISO 11357–6 but is different in technical content. These test methods are related to CEC L-85–T but includes additional experimental conditions.

1.6 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. Specific precautionary statements are given in 6.4 and 11.10.

Ключевые слова:
differential scanning calorimetry; hydrocarbons; isothermal temperature; oxidation; oxidation induction time; oxidative stability; pressure differential scanning calorimetry;