Simultaneous quantitative analysis of the acetate, formate, chloride, phosphate and sulfate anions in biodiesel by ion chromatography

• Published in: Fuel (Guildford) 2014-05, Vol.124, p.97-101
• Main Authors: Silveira, Eva Lúcia Cardoso, de Caland, Lilia Basílio, Tubino, Matthieu
• Format: Article
• Language: English
• Subjects: Acetates; Anion; Anions; Applied sciences; Biodiesel; Chlorides; Chromatography; Energy; Energy. Thermal use of fuels; Exact sciences and technology; Formates; Fuels; Green method; Ion chromatography; Phosphates; Quantitative analysis; Sulfates
• ISSN: 0016-2361; 1873-7153
• DOI: 10.1016/j.fuel.2014.01.095

[Display omitted] •Simultaneous quantitative analysis of anions in biodiesel by ion chromatography.•The extraction of the anions from the matrixes is performed using water.•The procedure is green and small volumes of water are used.•It is simple and can be performed rapidly.•Acetate, formate, chloride, phosphate and sulfate anions were be analyzed. A quantitative ion chromatographic analytical method for the simultaneous determination of the acetate, formate, chloride, phosphate, and sulfate anions in biodiesel is proposed. Samples of biodiesels prepared from soy, canola and sunflower vegetable oils, from crude soy oil, and from bovine fat were analyzed. The extraction of the anions from the matrixes was performed using water with the assistance of ultrasound. The observed limits of detection and of quantitation in mgkg−1 and the mean relative standard deviation in percent were, respectively: acetate, 0.32, 0.97 and 4.4; formate, 1.36, 4.12 and 6.2; chloride, 0.098, 0.30 and 6.5; phosphate, 0.81, 2.47 and 7.1; and sulfate, 0.087, 0.264 and 7.8. The procedure can be considered to be green because it uses small volumes of water, is simple, and can be performed rapidly.