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Thermooxidative Stability of Fennel Oleoresin Microencapsulated in Blended Biopolymer Agents

Author:
Chranioti, Charikleia, Tzia, Constantina
Source:
Journal of food science 2014 v.79 no.6 pp. C1091
ISSN:
0022-1147
Subject:
biopolymers, chitosan, fennel, gas chromatography, gum arabic, lipid peroxidation, mass spectrometry, microencapsulation, modified starch, oxidative stability, peroxide value, thermal stability
Abstract:
In this work, the oxidative and thermal stabilities of 4 different encapsulating agents (chitosan [CH], modified starch [MS], gum arabic [GA], and maltodextrin [MD]) used in fennel oleoresin microencapsulation by the freeze‐drying technique were evaluated both individually and in blends (binary and ternary ones). The oxidative stability of the encapsulated products was assessed by gas chromatography/mass spectrometry analysis of the secondary oxidation volatiles along with the use of oxidation markers (peroxide value, PV), while a differential scanning calorimetery analysis was conducted. Gum arabic, both plain and its mixtures, exhibited the lowest protection against lipid oxidation, presenting high PVs. However, good microencapsulation efficiency along with the best oxidative stability in terms of PV and thermal stability indicated that the formulations of MS‐CH and MS‐MD‐CH could be suggested as alternative encapsulating agents.
Agid:
392338