• Ester content

• Density al 15º

• Viscosity at 40º

• Fire poin

• Sulphyr content

• Carbonaceous residue (10% distillation residue)

• Shulphated ash content

• Water content

• Total contamination

• Cpper strip corrosion (3h at 50º)

• Oxidation stability

• Acidity

• Iodine value

• Linolenic acid methyl ester

• Polyunsaturated acid methyl ester

• Metanol content

• Mono-, di- and triglycerides

• Free and total glycerine

• Na+K. Ca+Mg content

• Phosphorus content

• CFOP

• % FAME in fuel oil

2. Raw Materials: Oils and Fats

In order to obtain quality biodiesel for problem-free in conventional vehicles, it is essential to control the quality of the raw materials:

• Humidity testing
  

• Impurities / Insoluble in ether

• Acidity testing
  

• Phosphorus content / Phosphotides

• Unsaponificable matter
  

• Oxidation stability
  

• Iodine value
  

• Wax content 
  

• Fatty acid distribution
  

3. By-product: Glycerine

• Water content

• Purity

• Methanol content

• Calculatino of matter (organic) non-glycerol (MONG)

• Oil content

• Ash content

• Soap content

• FAME content

• Acidity testing

• Metal testing