Acid value
Acid Value (AV) testing is an important analytical parameter used in animal feed and feed ingredient testing to assess the quality and condition of fats and oils. Acid value indicates the amount of free fatty acids present in a fat sample, which are formed due to the hydrolysis of triglycerides. This degradation may occur because of moisture, heat, prolonged storage, poor handling practices, or microbial activity. A high acid value is a clear indicator of fat deterioration and the onset of rancidity, making this test essential for feed quality assurance.
Methods:
IS 548 (Part 1): 1964
The acid value test is based on the neutralization of free fatty acids present in the fat or feed extract by titration with a standardized alkali solution, typically potassium hydroxide (KOH). The amount of alkali required to neutralize the acids is measured and expressed as milligrams of KOH required to neutralize the free fatty acids present in one gram of sample. The result reflects the extent of fat hydrolysis and overall fat quality.
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