| DOI | Trouver le DOI : https://doi.org/10.1016/j.saa.2015.02.106 |
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| Auteur | Rechercher : Savi, E. L.; Rechercher : Malacarne, L. C.; Rechercher : Baesso, M. L.; Rechercher : Pintro, P. T. M.; Rechercher : Croge, C.; Rechercher : Shen, J.1; Rechercher : Astrath, N. G. C. |
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| Affiliation | - Conseil national de recherches du Canada. Énergie, les mines et l'environnement
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| Format | Texte, Article |
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| Sujet | Chemical compounds; Chemical stability; Diffusion in solids; Laser excitation; Oil shale; Photochemical reactions; Photoreactivity; Molecular diffusion; Photo-stability; Photochemical stability; Photoreactions; Quantitative measurement; Synthetic antioxidants; Thermal lens; Thermal lens spectroscopy; Soybean oil |
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| Résumé | Assessment of photochemical stability is essential for evaluating quality and the shelf life of vegetable oils, which are very important aspects of marketing and human health. Most of conventional methods used to investigate oxidative stability requires long time experimental procedures with high consumption of chemical inputs for the preparation or extraction of sample compounds. In this work we propose a time-resolved thermal lens method to analyze photostability of edible oils by quantitative measurement of photoreaction cross-section. An all-numerical routine is employed to solve a complex theoretical problem involving photochemical reaction, thermal lens effect, and mass diffusion during local laser excitation. The photostability of pure oil and oils with natural and synthetic antioxidants is investigated. The thermal lens results are compared with those obtained by conventional methods, and a complete set of physical properties of the samples is presented. |
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| Date de publication | 2015-03-03 |
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| Dans | |
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| Langue | anglais |
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| Publications évaluées par des pairs | Oui |
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| Numéro NPARC | 21275668 |
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| Exporter la notice | Exporter en format RIS |
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| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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| Identificateur de l’enregistrement | 356f11c2-3c55-40af-bc43-9c2fc799b4e2 |
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| Enregistrement créé | 2015-07-14 |
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| Enregistrement modifié | 2020-04-22 |
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