Stability Tester Monitors Foods, Flavors and Fragrances

The PetroOXY rapid oxidation stability tester from Petrotest Instruments provides a tool for monitoring and controlling the oxidation stability (aging) of oils, fats, greases and other products, such as antioxidant and shelf-life additives used by food, fragrance and cosmetic industries.

Key features include fast test times and clear test results. The device offers repeatable and reproducible results, along with simple handling procedures, small sample sizes, user safety, automatic operation, and simple cleaning procedures. The tester is suited for fast stability spot checks as well as routine product monitoring.

The compact device has a small, hermetically sealed test chamber in which a 5-mL sample is combined with oxygen at a pressure of 700 kPa (approx. 7 bar) and heated to 140 C. These test conditions initiate a fast aging process, which is measured by a pressure drop within the chamber. The time needed to achieve a fixed pressure drop is directly related to the oxidation stability of the sample. Test times can be reduced by elevating the test temperature. Other parameters of pressure and temperature can be set individually.

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