Aroma sorption evaluation of aseptic packaging

A headspace method was developed for evaluating aroma sorption by polymeric packaging materials. Partition coefficients for ethyl acetate, n-hexanal, d-limonene and alpha-terpineol at vapor activities of 0.2 were measured between air and the materials at 25 degree C and 40 degree C. Four different flexible aseptic packaging materials with barrier layers of aluminium foil, polyvinylidene chloride (SARAN), metallized polyester (MPET) and ethylene vinyl alcohol (EVOH) were evaluated. Temperature and aroma type had significant effects on partition coefficients. No significant interaction between aromas were observed in partition coefficients. The inner polyolefin sealing layer determined the aroma sorption behavior

The application of a predictive migration model for evaluating the compliance of plastic materials with European Food Regulations

A model for estimating the migration of organic substances from plastic materials into foodstuffs has been previously developed. The use of this model allows a shift away from expensive and time consuming migration analysis in foods to much simpler compositional analysis in the material. Starting with toxicologically-based specific migration values, like the over 400 specific migration limit values for organic substances listed in the European Union's Synoptic Document No. 7, the corresponding allowable maximum quantity limits of these substances in the plastic were calculated. The amount of migration that can occur depends on many different factors such as the natures of the plastic, substance and food, contact time and temperature conditions, material thickness and number of uses. These factors can result in a variety of situations which must be taken into account in the estimation of migration. The handling of the migration estimation model is demonstrated for several practical migr ation scenarios using a series of case studies

The application of a model for evaluating the compliance of plastic materials with food regulations

A model for estimating the migration of organic substances from plastic materials into foodstuffs has been previously developed. The use of this model allows a shift away from expensive and time consuming migration analysis in foods to much simpler compositional analysis in the material. Starting with toxicologically based specific migration values, like the over 400 SML values for organic substances listed in the European Union's Synoptic Document N. 7, the corresponding allowable limits (QM) of these substances in the plastic were calculated. The amount of migration that can occur depends on many different factors such as the natures of the plasic, substance and food, contact time and temperature conditions, material thickness and number of uses. These factors can result in a variety of situations wich must be taken into account in the estimation of migration. The handling of the migration estimation model is demonstrated for several practical migration scenarios using a series of ca se studies

Quantitative analysis of polymer additives by coupled SFE/SFC.

Supercritical carbon dioxide was used supercritical fluid extraction (SFE) coupled with supercritical fluid chromatography (SFC) to quantitatively analyze additives in polymers. A unique method was used to measure carbon dioxide flows at the system's outlets. Triacetine in Biopol and Irganox additives in Polypropylene were measured

Alternative fatty food simulants for migration testing of polymeric food contact materials

The amounts of substances migrating from plastics into high fat contents are in most cases higher than in foo contents. This increase in migration compared to water migration is not necessarily due to an increase in the diffusion coefficient due to interactions between the is often assumed. Ethanol is a good simulant for fatty has little interaction with many plastics, e.g. polyol readily soluble in it, and because it is easy to work utilizable limits of ethanol and ethanol/water mixture are developed from the physical background of diffusio ethanol and ethanol/water mixtures is supported by pub experimental migration results. ethanol/water mixtures as food simulants are developed from the physical background of diffusion. The use of ethanol and ethanol/water mixtures is supported by published experimental migration results