کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
225674 464506 2007 17 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Interfacial mass transport properties which control the migration of packaging constituents into foodstuffs
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Interfacial mass transport properties which control the migration of packaging constituents into foodstuffs
چکیده انگلیسی

Interfacial mass transport properties, such as partition coefficients (K), mass transfer coefficients (h) and diffusion coefficients (D) were estimated from controlled desorption kinetics at 40 °C, which would be realistic of extreme conditions of use of the packaging materials in contact with a liquid food. The experiments were carried out on formulated pieces of low density polyethylene (LDPE) with variable thicknesses (50, 100 and 150 μm) dispersed in ethanol, in controlled conditions of stirring, with Biot mass number between 5 and 103. The 3 transport properties for 8 homologous molecules (n-alkanes and n-alcohols), 2 antioxidants and 2 fluorescent tracers were estimated from a set of 78 desorption kinetics. Concentrations in ethanol samples were measured by GC-FID. The uncertainty related to analytical errors was quantified by Monte-Carlo sampling consisting in adding an arbitrary white noise to results in the range of experimental errors. The physical interpretation of the external transport resistance is finally discussed.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Food Engineering - Volume 79, Issue 3, April 2007, Pages 1048–1064
نویسندگان
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