Based on ISO 10370. EN 14214 requires the test to be carried out on a 10% distillation residue of the sample while ASTM D 6751 requires 100% sample without prior distillation. The carbon residue value approximates the tendency of biodiesel to form deposits. The carbon residue is the residual material after evaporation and pyrolysis of a sample. The test indicates the amount of glycerides, free fatty acid, soaps and catalyst residues in the sample.

Main Research: Yung Chee Liang