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Monday, 16 February 2015

Free Fatty Acid Value (FFA)

18:17 Food technology , 0 Comments
Free Fatty Acid Value (FFA)
   Free Fatty Acid Value or Acid value is the Number of milligram's of Potassium hydroxide necessary to neutralize the free acids in 1g of oil/fat sample.
Reagents
*      Mixture of ethanol & di-ethyl ether                                                                                                (1:1)
*        NaOH    0.01 N
*       Phenolphthalein indicator                                                                                                                                                      
1% in Ethanol
Procedure
*      Take oil samples (2- 5 g) in a conical flask as well as blank (with out sample)

*      Add 30 ml neutralized ethanol and di-ethylether mixture. Heat the mixture on hot plate at 40 oC ( in case of ghee).
*      Add few drops of phenolphthalein indicator.

*      Titrate the solution with NaOH until pink colour was stable for at least 20 seconds & note the reading 


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