method of analysis of a biodiesel sample comprising fatty acid metal esters for free glycerol analysis and use of said method

摘要

"Method of Analysis of a Biodiesel Sample comprising Metal Fatty Acid Esters for Free Glycerol Analysis and Use of Said Method" The invention relates to a method of analyzing a biofuel sample comprising metal fatty acid esters for the purpose of determining free glycerol content, characterized in that solid phase extraction of glycerol from the sample is carried out in a collector containing a silica cartridge, on the one hand choosing a phase containing the metal esters and acylglycerols and on the other first, a phase containing the free glycerol thereafter, by drying said phase and suspending it in a solvent ethanol, and by introducing said suspension into an electrochemical cell containing a potassium hydroxide-based electrolyte and a glassy carbon electrode modified by the palladium nanoparticle deposit, and by measuring the concentration in glycerol liv re by cyclic voltammetry.