Oxidation stability of fats and oils

Objective of the analysis

The oxidation stability of fats is a critical parameter in the development and marketing of products containing oils, butters, or lipid extracts. Under the influence of oxygen, heat, or light, lipids can degrade, generating undesirable volatile compounds (aldehydes, ketones) and a loss of sensory, nutritional, or functional quality.

The Rancimat or Oxipres test measures the oxidation induction time: this is the moment when degradation becomes rapid and significant.

Available methods

• Rancimat method: accelerated oxidation of a sample at a controlled temperature (90–130 °C) under a constant airflow. The induction time is measured by detecting volatile compounds.
• Oxipres method: measurement under oxygen pressure in a hermetically sealed chamber, simulating extreme oxidation conditions to compare different samples.

These methods are used in quality control, formulation R&D, or to estimate the shelf life of products containing fats.

Analyzed matrices

• Vegetable oils (olive, sunflower, flaxseed, etc.)
• Animal or dairy fats (butter, lard)
• Functional lipid blends (cosmetics, creams, supplements)
• Foods high in fat (purees, sauces, biscuits, plant extracts)
• Ingredients intended for animal nutrition, aromatherapy or nutraceuticals

Advantages of the analysis

• Evaluate and compare oxidative stability between batches, formulations, or ingredient sources
• Determine the expected lifespan of a product
• Justify the use of natural or synthetic antioxidants
• Optimize storage conditions (temperature, packaging, protective atmosphere)
• Meeting regulatory, quality or marketing requirements (claims such as “guaranteed stability”, “oxidation-free”, etc.)

Related Products and Services

• Accelerated stability test
• Cosmetic stability test
• Photostability of solar products

Why go through YesWeLab?

At YesWeLab , we select the best expert laboratories in lipid stability, accredited to ISO 17025, to guarantee reliable, reproducible, and usable results. You benefit from:

• Personalized scientific support to help you choose the right method for your matrix
• From logistical and regulatory support via our digital platform
• Centralized access to over 200 analytical services for comprehensive monitoring of your ingredients or finished products

Request your quote now

Our team will respond quickly to configure the test tailored to your product. For any specific questions or requirements, please specify your expectations in your request.