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Oxidative Stability of Polyunsaturated Edible Oils Mixed With Microcrystalline Cellulose.
MedLine Citation:
PMID:  22131555     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
The oxidative stability of mixtures of edible oils containing polyunsaturated fatty acids (PUFA) and microcrystalline cellulose (MCC) was investigated. The mixtures studied consisted of oils of either camelina (CAM), cod liver (CLO), or salmon (SO) mixed with either colloidal or powdered MCC. A 50:50 (w/w) ratio of oil:MCC resulted in an applicable mixture containing high levels of PUFA edible oil and dietary fiber. The oxidative stability of the formulated mixtures and the pure oils was investigated over a period of 28 days. The peroxide value (PV) was assessed as a parameter for primary oxidation products and dynamic headspace gas chromatography mass spectrometry (GC/MS) was used to analyze secondary volatile organic compounds (VOC). CAM and the respective mixtures were oxidatively stable at both 4 and 22 °C during the storage period. The marine oils and the respective mixtures were stable at 4 °C. At 22 °C, an increase in hydroperoxides was found, but no increase in VOC was detected during the time-frame investigated. At 42 °C, prominent increases in PV and VOC were found for all oils and mixtures. Hexanal, a common marker for the degradation of n-6 fatty acids, propanal and 2,4-heptadienal (E,E), common indicators for the degradation of n-3 fatty acids, were among the volatiles detected in the headspace of oils and mixtures. This study showed that a mixture containing a 50:50 ratio of oil:MCC can be obtained by a low-tech procedure that does not induce oxidation when stored at low temperatures during a period of 1 month.
Authors:
Linda C Saga; Elling-Olav Rukke; Kristian Hovde Liland; Bente Kirkhus; Bjørg Egelandsdal; Jan Karlsen; Jon Volden
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-6-11
Journal Detail:
Title:  Journal of the American Oil Chemists' Society     Volume:  88     ISSN:  0003-021X     ISO Abbreviation:  -     Publication Date:  2011 Dec 
Date Detail:
Created Date:  2011-12-1     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7505574     Medline TA:  J Am Oil Chem Soc     Country:  -    
Other Details:
Languages:  ENG     Pagination:  1883-1895     Citation Subset:  -    
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