Spectroscopic Studies of the Quality of Fatty Acid Methyl Esters Derived from Waste Cooking Oil
Arkadiusz Matwijczuk1, Grzegorz Zając2, Radosław Kowalski3, Magdalena Kachel-Jakubowska4, Mariusz Gagoś5
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1Department of Biophysics, University of Life Sciences in Lublin,
Akademicka 13, 20-950 Lublin, Poland
2Department of Power Engineering and Transportation, University of Life Sciences in Lublin,
Głęboka 28, 20-612 Lublin, Poland
3Department of Analysis and Food Quality Assessment, University of Life Sciences in Lublin,
Skromna 8, 20-704 Lublin, Poland
4Department of Machinery Exploitation and Management of Production Processes,
University of Life Sciences in Lublin, Faculty of Production Engineering
5Department of Cell Biology, Institute of Biology, Maria Curie-Skłodowska University,
20-033 Lublin, Poland
Submission date: 2017-01-26
Acceptance date: 2017-04-12
Online publication date: 2017-10-17
Publication date: 2017-11-07
Pol. J. Environ. Stud. 2017;26(6):2643–2650
Biodiesel is a very attractive, biodegradable, renewable, and virtually nontoxic form of fuel. It is derived through base-catalysed transesterification of vegetable oils or animal fats. Analysis of biodiesel has become relevant, since the higher quality of the fuel is a key factor in commercialisation and market acceptance. The analytical methods employed are being constantly improved to meet this requirement. The most popular techniques for analysis of biodiesel include mainly chromatography and molecular spectroscopy. FTIR infrared spectroscopy is one of the most important spectroscopic techniques.
The article presents the results of UV-Vis absorption spectroscopy and FTIR infrared spectroscopy analysis employed for investigating methyl esters of higher fatty acids obtained with laboratory methods from selected sunflower and rapeseed oils and waste animal fats provided by a slaughterhouse. Commercial methyl esters were included in the analyses for comparison. In all samples, the contents of free glycerol, methanol, esters, and linolenic acid methyl ester in FAME were determined mainly to facilitate the spectroscopic analysis. The results of the investigations conducted with the aforementioned methods clearly indicate that the analysed WCO esters can be successfully used as potential industrial-scale biofuels.