FFA test for oil/Ghee sample

Free fatty acid test for Ghee/ oil sample .(F.F.A)

Method.

1) 50ml distilled spirits add in conical flask.
2) Then add phenophlene indicator few drops.
3) Triturate against 0.1N N NAOH solution and light pick colour attain.
4) Then add 10ml sample of oil or Ghee in flask & then heated at 30 or 40 c°
5) Then titrate it against 0.1N NAOH solution 
End point ^^^^^Radish brown colour attain.

Formula. 

%F.F.A = ml used*0.282

Ml used *normality of solution *mole w.t of ffa/weight of sample*1000