The determination of the oxidation stability of oils and fats is the classical application for the 743
Rancimat. The resulting induction time characterizes the resistance of oils and fats to oxidation.
In addition to the term «induction time», the expression Oil Stability Index (OSI) is in common use.
The Rancimat method is also called the automated Swift test or accelerated oxidation test and is
in general use today as an automated version of the previously used and extremely complicated
Active Oxygen Method (AOM).