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PhotooxidationEffect in Liquid Lipid Matrices: Answers from an Innovative FTIR Spectroscopy Strategy with 'Mesh Cell' Incubation
- Source :
- Digital.CSIC. Repositorio Institucional del CSIC, instname
- Publication Year :
- 2018
-
Abstract
- Developing new approaches to evaluate the stability of edible oils under moderate conditions is highly demanded today to avoid accelerated experiments that are not well correlated with actual shelf life. In particular, low intensity of visible light (photooxidation) needs to be integrated in stability studies, together with mild temperature. Thus, in this work, a strategy based on a >mesh cell>-FTIR to monitor chemical changes in lipid matrices using a combination of light and mild heating was applied. The results were compared with those obtained for the stability of triolein used as a molecular model. The study showed that the moderate light intensity (400 lx) at a low temperature (23 °C) has an early effect on the degradation of lipid matrices that is not observed when they are stored at 35 °C in the absence of light. Thus, the results proved that the exposure to light (400 lx) was more relevant than mild heating (35 °C) in monounsaturated lipid matrices, while polyunsaturated lipid matrices were more sensitive to mild heating.
- Subjects :
- Triolei
Light
Shelf life
01 natural sciences
chemistry.chemical_compound
0404 agricultural biotechnology
Spectroscopy, Fourier Transform Infrared
Plant Oils
Mesh cell
Triolein
Fourier transform infrared spectroscopy
Photooxidation
Incubation
Chemistry
010401 analytical chemistry
Combination of mild storage conditions
Edible oils
Temperature
04 agricultural and veterinary sciences
General Chemistry
040401 food science
0104 chemical sciences
Light intensity
FTIR spectroscopy
Chemical engineering
Degradation (geology)
General Agricultural and Biological Sciences
Oxidation-Reduction
Intensity (heat transfer)
Visible spectrum
Subjects
Details
- ISSN :
- 15205118
- Volume :
- 66
- Issue :
- 13
- Database :
- OpenAIRE
- Journal :
- Journal of agricultural and food chemistry
- Accession number :
- edsair.doi.dedup.....4138b4d7a3ccbb78fe750b4d83252ffd