The release of volatile compounds from food matrices is governed by kinetic and thermodynamic phenomena.
Intrinsic properties of the food matrix, extrinsic factors (temperature, pressure) as well as the interaction with non
volatile compounds in the food matrix are involved in both the release rate and the aroma concentration in
equilibrium. The objective of this study was to investigate the influence of the composition (i.e. gelling agents -
gelatine, starch pectin- and sugars) on the release and sensory perception of aroma compounds from candy model
systems added with a standard strawberry flavour. Model candies were prepared by using gelatine gelatine and starch,
starch and pectin (P). All samples were added with the same concentration of a strawberry aroma (0.25%db) and with
the exception of Aes, all models, after setting, were dried under the same process conditions and stored in HDPE bags
until analysis. Evaluations of the release of aroma compounds under equilibrium conditions were carried out by Head
Space Gas Chromatography and Electronic Nose both on the model candies and the same submerged in water to
mimic the dissolution in the mouth. The kinetics of the aroma release from the models during dissolution to reach the
equilibrium were also investigated. Sensory evaluations and mechanical analyses under standardised procedure were
also carried out. The partitioning of strawberry aroma compounds from the candy model systems at equilibrium in the
head space was highly affected by the gelling agent type and sugar content. The affinity of the aroma compound for
the biopolymer/s of the candy model system and structural properties are implied in the different release in the vapour
phase of EA (more polar) and EH (more apolar). The kinetics of the volatiles release from the candies in water varied
depending on the aroma nature and the physical properties of the systems as affected by the gelling agent
The release of volatile compounds from food matrices is governed by kinetic and thermodynamic phenomena.Intrinsic properties of the food matrix, extrinsic factors (temperature, pressure) as well as the interaction with nonvolatile compounds in the food matrix are involved in both the release rate and the aroma concentration inequilibrium. The objective of this study was to investigate the influence of the composition (i.e. gelling agents -gelatine, starch pectin- and sugars) on the release and sensory perception of aroma compounds from candy modelsystems added with a standard strawberry flavour. Model candies were prepared by using gelatine gelatine and starch,starch and pectin (P). All samples were added with the same concentration of a strawberry aroma (0.25%db) and withthe exception of Aes, all models, after setting, were dried under the same process conditions and stored in HDPE bagsuntil analysis. Evaluations of the release of aroma compounds under equilibrium conditions were carried out by HeadSpace Gas Chromatography and Electronic Nose both on the model candies and the same submerged in water tomimic the dissolution in the mouth. The kinetics of the aroma release from the models during dissolution to reach theequilibrium were also investigated. Sensory evaluations and mechanical analyses under standardised procedure werealso carried out. The partitioning of strawberry aroma compounds from the candy model systems at equilibrium in thehead space was highly affected by the gelling agent type and sugar content. The affinity of the aroma compound forthe biopolymer/s of the candy model system and structural properties are implied in the different release in the vapourphase of EA (more polar) and EH (more apolar). The kinetics of the volatiles release from the candies in water varieddepending on the aroma nature and the physical properties of the systems as affected by the gelling agent
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