Assessment of linoleic acid oxidation parameters using differential scanning calorimetry

• Published in: Żywność Vol. 18; no. 2
• Main Authors: Gorska, A, Ostrowska-Ligeza, E, Wirkowska, M, Brys, J.,Szkola Glowna Gospodarstwa Wiejskiego, Warszawa (Poland). Katedra Chemii
• Format: Journal Article
• Language: English; Polish
• Published: 2011
• Subjects: ACIDE LINOLEIQUE; ACIDO LINOLEICO; COLORIMETRIA; COLORIMETRIE; COLORIMETRY; ESTABILIDAD; http://www.fao.org/aos/agrovoc#c_16368; http://www.fao.org/aos/agrovoc#c_2572; http://www.fao.org/aos/agrovoc#c_36930; http://www.fao.org/aos/agrovoc#c_4352; http://www.fao.org/aos/agrovoc#c_5472; LINOLEIC ACID; OXIDACION; OXIDATION; OXYDATION; PROPIEDADES TECNICAS; PROPRIETE TECHNOLOGIQUE; STABILITE; STABILITY; TECHNICAL PROPERTIES
• ISSN: 1425-6959
• DOI: 10.15193/zntj/2011/75/106-114

Essential unsaturated fatty acids: linoleic and alpha-linolenic play a specific role in the proper functioning of human body. As polyunsaturated acids, they are exposed to oxidation, and, as a result, they lose their biological activity. Therefore, it is so important to assess the oxidative stability since it is the main indicator of the wholesomeness and technological usefulness of fats. The scope of the paper included the determination of thermo-kinetic parameters of linoleic acid using a differential scanning calorimetry test, as well as the assessment of oxidative stability of the acid analyzed. A dynamic option of DSC apparatus was used in the analysis and the following rates of heating samples were applied: 4 K/min; 5 K/min.; 7,5 K/min; 12,5 K/min; 15 K/min. The non-isothermal process of linoleic acid oxidation was measured using a differential scanning calorimeter; owing to this, it was possible to efficiently determine the activation energy, pre-exponential factor, and the reaction-rate constant