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Free Fatty Acids Test

  • 77 per analysis
  • |
  • 7-9 Business days
  • |
  • Rush Available
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Free Fatty Acids Test

Technical data sheet


Method description

The fat in a sample is extracted into an organic solvent and titrated with sodium hydroxide. Rancidity is calculated as percent oleic acid for most fats and oils. Coconut and palm kernel oils are calculated as percent lauric acid, and palm oil is calculated as percent palmitic acid.

Acceptable matrices

Most fats and oils, flours, nuts, animal foods, mixes

Products should be at least 3% fat in order to obtain reportable results.

Unacceptable matrices

Dairy, egg yolks, dough, rice bran/rice bran oil, fish oil, soup, broth, beverages, dried fruit, fresh fruit, lecithin.

Samples that clump or form masses upon stirring, have low fat, or high water content – anything that prevents the ability to extract fat using petroleum ether.

Limit of quantitation

Fats and Oils – 0.01%
Foods – 0.15%

The detection limit will change based on the sample weight analyzed.


Electronic titrator

Method reference

AOCS CA 5a-40

Reportable unit

Samples reported as % FFA as oleic acid.
May also be reported as % lauric acid and % palmitic acid upon request.

Sample size requirements

Please provide a sample of at least 100g to ensure results are representative of the sample submitted.

At least 0.50 grams of fat extracted from food products is needed to run this analysis.

Additional information

This test is ISO/IEC 17025 accredited through A2LA, Certificate # 2769.01.

This test provides a measure of hydrolytic rancidity in an oil or food product. Hydrolytic rancidity involves chemical enzymatic hydrolysis of fats into free fatty acids and glycerol.

*Prices and offerings are subject to change without notice.

Common Free Fatty Acids Test Testing Questions

While our sales and customer service team are happy to answer general testing questions, consultations typically start at a rate of $250 per 30 minutes regarding the interpretation of reported test results or questions about our test methods. We cannot consult on regulations, tolerance limits, or claims.

We make every effort to keep our methods and detection limits up to date according to the latest standards and qualifications. If you have any questions regarding the limit of detection/quantification or method references, please contact our Customer Service team at 1-800-245-5615.

Our standard turnaround time is 10 business days for most assays. There are some assays that require a longer turnaround time. We also offer a RUSH service that is half the time of the standard turnaround time of the assay at double the cost of the assay. A few assays that we provide cannot be rushed due to the nature of the test. Please check the specific assay you are interested in regarding the ability to RUSH the turnaround time.

Medallion Labs, a division of General Mills, offers multiple areas of expertise for analytical testing and product evaluation for the food and ingredient industry. Our areas of expertise include Chemical Analysis, Nutritional Analysis, Food Safety, Shelf Life Studies, Microbiology, Specialty Fibers, Physical Testing, Allergen Testing, as well as Product Evaluation (which includes Product Performance and Sensory Evaluation) and Technical Consulting/Method Development. Our methods are developed for the testing of food products and ingredients.

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Medallion Labs

A food testing program designed with mid-market and enterprise food and ingredient manufacturers in mind.