Authors: Ducruet, V.¹; Vitrac, O.²; Saillard, P.³; Guichard, E.⁴; Feigenbaum, A.⁵; Fournier, N.⁴

Source: Food Additives and Contaminants, Volume 24, Number 11, November 2007 , pp. 1306-1317(12)

Publisher: Taylor and Francis Ltd

Abstract:

The sorption of 14 aroma compounds into PET and PVC was monitored during storage of a strawberry syrup for 1 year. Concentrations in the syrup and in the polymer were determined during storage and compared with previously published results obtained with glass bottles. Apparent partition coefficients between the polymer and the syrup (noted Kapp) were estimated from experimental kinetics without reaching equilibrium Kapp values and optimally identified from the kinetic data obtained between 30 and 90 days. They exhibited a similar behaviour for both polymers with values were between 2 × 10-5 and 2 × 10-3, 4 × 10-5 and 3 × 10-2, respectively, for PET and PVC. The variation of Kapp values in PET was mainly correlated to the polarity of tested compounds as assessed by their log P values. By contrast, the variations in Kapp values for PVC were mainly related to their chain lengths. Due to slightly higher partition coefficients and diffusion coefficients in PVC compared with PET, the amount of absorbed aroma was four times higher in PVC than in PET; however, the amount of absorbed aroma compounds was less than 0.1% of the initial amount present into the syrup, except for octyl butanoate. The variation in concentration in the syrup was interpreted as a combination of a degradation process and a transport process into the packaging material. Both effects were particularly noticeable for both PET and unstable aroma compounds.

Keywords: Aroma; PET; PVC; packaging; sorption; strawberry; syrup

Document Type: Research article

DOI: http://dx.doi.org/10.1080/02652030701361283

Affiliations: 1: INRA, Unité Mixte de Recherche SCALE and, 2: INRA Unité Mixte de Recherche GENIAL, 1 avenue des Olympiades, Massy CEDEX, France 3: INRA Laboratoire de Nutrition et Sécurité Alimentaire, F-78352 Jouy en Josas CEDEX, France 4: INRA, Unité Mixte de Recherche FLAVIC, 17 rue Sully, BV 86510, F-21065 Dijon CEDEX, France 5: INRA, Unité Mixte de Recherche FARE, Moulin de la Housse, Reims, France

Publication date: 2007-11-01

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