Determining Oxidation Induction Time by DSC
Oxidation is a chemical reaction in which a substance loses electrons, either by the addition of oxygen or by the removal of hydrogen. The oxidation of materials can lead to failure in their particular use or application. For example, polymers become brittle, edible oils become rancid, mineral oils undergo polymerization, and petrochemical products exhibit a change in viscosity.
- Introduction to oxidation induction time (OIT) and thermal analysis
- Principles of OIT and oxidation onset temperature (OOT)
- Comparison of OIT and OOT
- Different DSC techniques for studying OIT and OOT
- Industries where OIT and OOT investigations are used
- Application examples
OIT Measurements
The OIT test is a standardized isothermal measurement performed with a differential scanning calorimeter (DSC) to measure the resistance of a material to oxidation. The sample is heated in the presence of air or oxygen and the time it takes for the material to oxidize is measured. The test is typically used to evaluate the oxidative stability of oils, polymers, and foods, as well as to assess the effectiveness of antioxidants in preventing oxidation. These tests are frequently employed for process development and quality control.
Join the webinar to explore the potential applications of the OIT technique, and get the chance to ask our experts your questions!
Presenter: Angela Hammer, Dr. sc. nat. ETH**
Dr. Angela Hammer received a Ph.D. in Analytical Chemistry (development of immobilized components for the use in ion-selective electrodes based on polyurethane membranes) from the Institute of Organic Chemistry at the Swiss Federal Institute of Technology in Zürich, Switzerland. She then joined Sika Technology AG in Zurich, Switzerland, as an analytical chemist. In 2007, she joined METTLER TOLEDO and has worked there since as an application specialist for Thermal Analysis. In her present position, she uses, teaches, and supports DSC, TGA, TMA, and DMA instruments for the METTLER TOLEDO’s Materials Characterization Group located at the head office in Switzerland.
