4.7 Article

Linseed oil presents different patterns of oxidation in real-time and accelerated aging assays

Journal

FOOD CHEMISTRY
Volume 208, Issue -, Pages 111-115

Publisher

ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2016.04.010

Keywords

Linseed oil; Accelerated aging; Schaal oven stability test; Real-time aging; Oxidation products; Myricetin; Antioxidant

Funding

  1. Service public de Wallonie - DGO 6

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This study aimed at verifying if the hypothesis that one day at 60 degrees C is equivalent to one month at 20 degrees C could be confirmed during linseed oil aging for 6 months at 20 degrees C and 6 days at 60 degrees C using the Schaal oven stability test. Tests were conducted with linseed oil supplemented or not with myricetin or butyl-hydroxytoluene as antioxidants. Oxidation was evaluated with the peroxide and p-anisidine values, as well as the content in conjugated dienes and aldehydes. All four indicators of oxidation showed very different kinetic behaviors at 20 and 60 degrees C. The hypothesis is thus not verified for linseed oil, supplemented or not with antioxidant. In the control oil, the conjugated dienes and the peroxide value observed were respectively of 41.8 +/- 0.8 Absorbance Unit (AU)/g oil and 254.3 +/- 5.8 meq. O-2/kg oil after 6 months at 20 degrees C. These values were of 18.2 +/- 1.3 AU/g oil and 65.2 +/- 20.3 meq. O-2/kg after 6 days at 60 degrees C. (C) 2016 Elsevier Ltd. All rights reserved.

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