Methods The main fatty acid in vegetable oils was determined using GC - MS and qualitative test of oils was done using national standard method.

Biodiesel, fatty acid alkyl ester, is made from renewable bioenergy such as vegetable oils and animal fats.

Biodiesel, also known as fatty acid alkyl esters which are made from renewable biological sources such as vegetable oils or animal fats, is a sort of renewable energy of friendly environment.