Analysis of free glycerol in biodiesel samples by electrochemical detection

摘要

The invention relates to a method for analyzing a biofuel sample containing fatty acid methyl ester to determine the content of free glycerol, which is characterized in that:Glycerol is extracted from the sample by solid-phase extraction from the header containing silica box, on the one hand, it is removed from the phase containing methyl ester and acylglycerol, on the other hand, it is removed from the phase containing free glycerol. The phase was dried and suspended in an ethanol solvent. The suspension was introduced into an electrochemical cell containing potassium hydroxide electrolyte and glass carbon electrode modified by palladium nanoparticles. The free glycerol concentration was measured by measuring the free glycerol concentration. Cyclic voltammetry