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Effect of Spray‐Dried Flavonoid Microparticles on Oxidative Stability of Methyl Linoleate as Lipid Model System
Author(s) -
Palma Manuel,
MárquezRuiz Gloria,
García Paula,
Holgado Francisca,
Vergara Cristina,
Giménez Begoña,
Robert Paz
Publication year - 2017
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/s11746-016-2920-8
Subject(s) - chemistry , induction period , flavonoid , lipid oxidation , chromatography , quercetin , oxidative phosphorylation , degradation (telecommunications) , polymer , spray drying , stereochemistry , organic chemistry , biochemistry , antioxidant , catalysis , telecommunications , computer science
Microencapsulated quercetin (Q) and epicatechin (E) were prepared by spray‐drying using inulin (IN) as encapsulating agent (Q–IN and E–IN) as well as with Capsul (C) as channelizing agent (Q–IN–C and E–IN–C). Microparticles were added to methyl linoleate (ML) and results showed that Q microparticles markedly improved its oxidative stability by increasing the induction period values and delaying the formation of oxidation compounds, as determined by high‐performance size‐exclusion chromatography, with respect to E microparticles, thus suggesting the importance of flavonoid C‐ring substitution. Remaining levels of Q in the lipid system throughout oxidation of ML added with Q microparticles seemed to show two releasing zones: the first one corresponds to the equilibrium zone, when Q released from microparticles replaces Q that is being degraded; the second zone corresponds to the degradation of Q, when the release rate of the encapsulated Q is slower than its degradation rate. In contrast, E microparticles showed only one zone corresponding to the release of surface E. The end of the induction period was in line with the exhaustion of Q and E and the initiation of formation of advanced oxidation products (polymers). In conclusion, Q microparticles have a potential application to extend the shelf‐life of lipid matrixes.