Investigation into photostability of soybean oils by thermal lens spectroscopy

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DOIResolve DOI: http://doi.org/10.1016/j.saa.2015.02.106
AuthorSearch for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for:
TypeArticle
Journal titleSpectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy
ISSN1386-1425
Volume145
Pages125129; # of pages: 5
SubjectChemical 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
AbstractAssessment 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.
Publication date
PublisherElsevier
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); Energy, Mining and Environment
Peer reviewedYes
NPARC number21275668
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Record identifier356f11c2-3c55-40af-bc43-9c2fc799b4e2
Record created2015-07-14
Record modified2016-05-09
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