title: Characterization of lipid oxidation in plant oils by micro-calorimetry.
abstract: A new experimental device was developed, based on the measurement of the heat flux dissipated during chemical reactions. The technique was exploited for real time monitoring of lipid oxidation in plant oils. The thermopiles were used in adiabatic configuration in order to measure the entire heat flux and improve sensitivity. Measurements were operated with a resolution of few μW as required to follow low exothermic reactions like oxidation. The validation of the device was performed by correlating conjugated diene concentrations measured by spectrophotometry and the heat flux dissipated by oxidation reactions. Our experimental approach involved several plant oils analyzed in isothermal conditions. This novel technique provides a versatile, sensitive, solvent-free and yet low-cost method to assess lipid oxidation stability, particularly suitable for the fast screening of plant oils.
authors.affiliation: Laboratoire des Méthodes et Techniques d'Analyse, INRAP, Pôle technologique de Sidi Thabet, 2020 Sidi Thabet, Tunisia; Univ. Bordeaux, CBMN, UMR 5248, 33600 Pessac, France; CNRS, CBMN, UMR 5248, 33600 Pessac, France; Bordeaux INP, CBMN, UMR 5248, 33600 Pessac, France; INSAT, Carthage University, Centre Urbain Nord, 1080 Tunis Cedex, Tunisia.
authors.forename: Wafa
authors.initials: W
authors.lastname: Dridi
authors.affiliation: Univ. Bordeaux, I2M, UMR 5295, 33400 Talence, France; CNRS, I2M, UMR 5295, 33400 Talence, France; Bordeaux INP, I2M, UMR 5295, 33400 Talence, France; Arts et métiers Paris Tech, I2M, UMR 5295, 33400 Talence, France.
authors.forename: Jean
authors.initials: J
authors.lastname: Toutain
authors.affiliation: Univ. Bordeaux, I2M, UMR 5295, 33400 Talence, France; CNRS, I2M, UMR 5295, 33400 Talence, France; Bordeaux INP, I2M, UMR 5295, 33400 Talence, France; Arts et métiers Paris Tech, I2M, UMR 5295, 33400 Talence, France.
authors.forename: Alain
authors.initials: A
authors.lastname: Sommier
authors.affiliation: Laboratoire des Méthodes et Techniques d'Analyse, INRAP, Pôle technologique de Sidi Thabet, 2020 Sidi Thabet, Tunisia.
authors.forename: Wafa
authors.initials: W
authors.lastname: Essafi
authors.affiliation: INSAT, Carthage University, Centre Urbain Nord, 1080 Tunis Cedex, Tunisia.
authors.forename: Mohamed
authors.initials: M
authors.lastname: Gargouri
authors.affiliation: Univ. Bordeaux, CBMN, UMR 5248, 33600 Pessac, France; CNRS, CBMN, UMR 5248, 33600 Pessac, France; Bordeaux INP, CBMN, UMR 5248, 33600 Pessac, France.
authors.forename: Fernando
authors.initials: F
authors.lastname: Leal-Calderon
authors.affiliation: Univ. Bordeaux, CBMN, UMR 5248, 33600 Pessac, France; CNRS, CBMN, UMR 5248, 33600 Pessac, France; Bordeaux INP, CBMN, UMR 5248, 33600 Pessac, France. Electronic address: mcansell@enscbp.fr.
authors.forename: Maud
authors.initials: M
authors.lastname: Cansell
mesh_terms: D002151:Calorimetry / Q000379:methods*; D015525:Fatty Acids, Omega-3 / Q000032:analysis*; D005504:Food Analysis / Q000379:methods*; D006358:Hot Temperature; D050356:Lipid Metabolism; D010084:Oxidation-Reduction; D010938:Plant Oils / Q000737:chemistry*; D013053:Spectrophotometry / Q000379:methods; D013816:Thermodynamics; D017962:alpha-Linolenic Acid / Q000032:analysis
chemical_list: D015525:Fatty Acids, Omega-3; D010938:Plant Oils; D017962:alpha-Linolenic Acid
keywords: Conjugated diene hydroperoxides; Lipid oxidation; Microcalorimeter; Thermal analysis