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Kinetics of rapeseed oil oxidation by pressure differential scanning calorimetry measurements
Author(s) -
Kowalski Boleslaw,
Gruczynska Eliza,
Maciaszek Katarzyna
Publication year - 2000
Publication title -
european journal of lipid science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.614
H-Index - 94
eISSN - 1438-9312
pISSN - 1438-7697
DOI - 10.1002/(sici)1438-9312(200005)102:5<337::aid-ejlt337>3.0.co;2-3
Subject(s) - differential scanning calorimetry , chemistry , isothermal process , calorimeter (particle physics) , kinetics , analytical chemistry (journal) , extrapolation , calorimetry , rapeseed , thermodynamics , oxygen , activation energy , mineralogy , chromatography , organic chemistry , food science , mathematical analysis , physics , mathematics , quantum mechanics , detector , electrical engineering , engineering
Samples of rapeseed oils were oxidized at isothermal conditions in the cell of a pressure differential scanning calorimeter (PDSC). The experiments were carried out under 1400 kPa oxygen pressure at a temperature in the range of 113—144 °C. From resulting PDSC exotherms the times to reach the peak maximum (τ max ) were determined and used for the assessment of the oxidative stabilities of the samples. As PDSC exotherms were obtained at different temperatures, equations for extrapolation of the τ max values were proposed and activation energies as well as specific rate constants for oxidation were calculated.