A clever strategy for permeability studies of methyl bromide and some organic compounds through high-barrier plastic films |
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Authors: | Cristina Nerín Elena Canellas Joaquín Romero Ángel Rodriguez |
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Institution: | Grupo GUIA-Instituto de Investigación de Ingeniería en Aragón (I3A) , Centro Superior de Ingenieros (CPS), María de Luna 3, 50018 Zaragoza, Spain |
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Abstract: | An analytical strategy has been proposed and optimized to study the permeability of several flexible plastic materials, some of them with high-barrier properties, versus naphthalene, methyl bromide, toluene, ethylbenzene, and ortho- and para-xylenes. The strategy involves using a system of concentric plastic bags made from the materials to be tested polyethylene (PE) and used as permeable plastics to facilitate the homogeneous distribution of a solid compound, such as naphthalene, in vapour phase. After the permeation test, the vapour phase containing the pollutants that cross the plastic barrier is trapped in a 12% ethanol–water solution and further analysed by SPME in headspace mode. Several experimental conditions as well as different samples were tested. The results obtained are shown and discussed. |
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Keywords: | Permeation Methyl bromide Naphthalene Toluene Ethylbenzene Xylene high-barrier plastics Packaging materials SPME analysis Wine transport |
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