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We conducted a study to examine aroma leakage from orange juice packed in gable-top paper containers for chilled distribution. Limonene, an aromatic component of orange juice, was considered as an index compound of aroma leakage, and its seepage on the surface of the container and concentration in the orange juice were measured by GC-MS for 12 commercial samples. After 3 days of storage, limonene was detected on the surface of 8 orange juice containers, and the concentration of limonene in the orange juice was found to have decreased. Thus, limonene leaked through the container within a few days, and the extent of leakage differed between containers, presumably depending upon their barrier properties. In addition, limonene was detected in green tea and milk that was stored together with the unopened orange juice containers at 4℃. The transference of orange aroma into milk was significant, because the contamination of the milk was confirmed by subjective sensory evaluation. This study suggests the possibility of transfer of aroma compounds through paper containers to other beverages.

The objective of this work was to study the transfer of four aroma compounds (ethyl butyrate, ethyl hexanoate, cis-3-hexenol, and benzaldehyde) from a solid and complex-flavored food matrix (sponge cake) toward and through packaging films placed in indirect contact during storage in accelerated aging conditions (38 °C and 86% relative humidity gradient). The efficiency of treated papers relative to that of standard paper and plastic as barrier was tested. Before storage, aroma compound volatility in the sponge cake was measured, and similar values were found between aroma compounds, due to the fat content of the sponge cake. Whatever the aroma compound, permeability values during storage were similar for the same packaging film. The plastic film was the highest barrier, whereas calendering and coating treatments applied to treated papers decreased effectively their permeability. An opposite trend was observed for aroma compound sorption into packaging films during storage. Keywords: Aroma compound; sponge...

International audience; The transport properties of two methyl ketones, 2-heptanone and 2-nonanone, through a paper coated with a wheat gluten (WG) solution were studied as a function of aroma compound concentration differential and relative humidity. Whatever the conditions, coating improved the aroma barrier properties of the paper. Whereas permeability of 2-nonanone through WG coated paper was not affected by the concentration differential, a high concentration of 2-heptanone induced a permeability increase, which can be explained by a slight plasticization effect of this compound. The moisture content of the films markedly affected the barrier properties depending on the aroma compound. For 2-heptanone, the most polar compound, the increase of permeability with relative humidity was related to the increase of diffusivity and solubility coefficient of this compound. With 2-nonanone, permeability and diffusivity coefficients strongly decreased with the increase of moisture content. This decrease could be linked to the hindrance in diffusivity of the less polar compound induced by the presence of water molecules. The different behavior in permeation properties seems to be related to the hydrophobic nature of the aroma compound. At intermediate and high humidity levels, coated papers are found to have better aroma barrier properties than LDPE films.

Im Rahmen eines Forschungsauftrages der Alcan Deutschland hat das Fraunhofer-Institut in München eine vergleichende Auswertung der Schutzwirkung verschiedener Innerliner gegen Aroma- und Feuchtigkeitsverlust durchgeführt. Die verglichenen Werkstoffe waren aluminiumbeschichtetes Papier, metallisiertes Papier und bedrucktes Papier. Zigarettenpäckchen mit unterschiedlichen Innerliner wurden vor der Auswertung einen Monat bei 23 Grad C gelagert.

In der vorliegenden Untersuchung werden drei Zigaretteninnenwickler aus Aluminium/Papier-Verbund (APV), metallisiertem Papier und bedrucktem Papier bezüglich ihrer Durchlässigkeit für Aromastoffe geprüft und miteinander verglichen. Dabei ergibt sich für die Durchlässigkeit der drei Sperrschichten analog zur Wasserdampfdurchlässigkeit folgendes: APV zeigt die geringste Durchlässigkeit, es folgt metallisiertes Papier mit größerer und bedrucktes Papier mit der größten Durchlässigkeit. Die Permeation durch die simulierte Wand einer Zigarettenverpackung (Innenwickler + Karton + PP) erfolgt mit analogem Ergebnis. Die Absorption der Riechstoffe im Karton steht in direktem Zusammenhang mit der Durchlässigkeit der Innenwickler.