Erratum to “Determination of free glycerol in biodiesel at a platinum oxide surface using potential cycling technique” [Talanta 79 (2009) 92–96]

Automatized flow-batch method for fluorescent determination of free glycerol in biodiesel samples using on-line extraction

“…After the transesterification process, free glycerol can be easily removed from the biodiesel by successive washing of the biodiesel with distilled water. On the other hand, a low content of glycerides can only be achieved by selecting the appropriate reagents and reaction conditions, or by further distillation of the product [4].…”

A cellulose monolithic stir bar for sorptive extraction of glycerol from biodiesel

“…5,18 In this context, several methods for determining free glycerol in biodiesel have been proposed, aiming at a more viable, simple, and environmentally friendly. [14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31] Among these methods, approaches employing electroanalytical, 15,[19][20][21] chromatographic, 14,[22][23][24] electrophoretic, 17,25 spectrophotometric 16,[26][27][28][29][30] or volumetric 31 techniques have been evaluated. However, most of these methods require the use of chemical reagents and organic solvents, such as derivatization reagents, dissolution solvents, and adsorbents, or specic devices (electrodes, apparatus, glassware, cartridges), which are not accessible and very expensive, maintaining necessary the search for a simple method for the determination of free glycerol in biodiesel.…”