“The first thing that needs to be done, after being assured that the oil does not contain water, is to find out what the levels of FFA’s (Free Fatty Acids) are in the oil.
This is done by the process of titration.
A reliable method of titration is a priority for the most commonly used method of producing home based Biodiesel.
The school of thought on methods varies slightly from author to author, however it must show the accurate titration level in order for the proper amount of catalyst, be it Sodium Hydroxide/NaOH, or Potassium Hydroxide/KOH that is to be dissolved into the Methanol/Methyl Hydrate forming a layman’s methoxide…”