Determination of free glycerol in biodiesel at a platinum oxide surface using potential cycling technique
| Autor: | Leandro Maranghetti Lourenço, Nelson Ramos Stradiotto |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
Glycerol
Biodiesel Chromatography Extraction (chemistry) Analytical chemistry Reproducibility of Results food and beverages chemistry.chemical_element Oxides Electrochemical Techniques complex mixtures Analytical Chemistry chemistry.chemical_compound chemistry Linear Models Sample preparation Cyclic voltammetry Platinum Energy source Electrodes Oxidation-Reduction Gasoline Electrode potential |
| Zdroj: | Talanta. 79:92-96 |
| ISSN: | 0039-9140 |
| Popis: | A novel, inexpensive and fast method based on the electrooxidation of glycerol on platinum electrodes by the potential cycling technique has been designed for the determination of free glycerol in biodiesel. A wide range of linearity was achieved between 15 and 150 mg L −1 (0.16 and 1.6 mmol L −1 ), which corresponds to concentrations ranging between 56 and 560 mg kg −1 (glycerol:biodiesel) for an extraction using 2 g biodiesel. A method for the fast extraction of glycerol from biodiesel with water followed by elimination of organic interferents has also been developed, so that the novel determination method can be applied to various biodiesel samples. The excellent repeatability allows determination of glycerol in numerous samples, with no need for recalibration. |
| Databáze: | OpenAIRE |
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