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Modelling of oxygen diffusion through a model permeable package and simultaneous degradation of vitamin C in apple juice
Author(s) -
Barront F. H.,
Harte B.,
Giacin J.,
Hernandez R.
Publication year - 1993
Publication title -
packaging technology and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.365
H-Index - 50
eISSN - 1099-1522
pISSN - 0894-3214
DOI - 10.1002/pts.2770060606
Subject(s) - oxygen , diffusion , permeation , finite element method , high density polyethylene , chemistry , polyethylene , low density polyethylene , chemical engineering , materials science , analytical chemistry (journal) , chromatography , thermodynamics , organic chemistry , engineering , structural engineering , biochemistry , physics , membrane
The objective of this study was to apply the finite element method (FEM) to modelling the simultaneous oxygen diffusion and chemical reaction in a packaged liquid food. Cylindrical high‐density polyethylene (HDPE) packages, top and bottom insulated, were designed to contain apple juice or water containing vitamin C. Oxygen consumption was monitored by a micro‐oxygen electrode. A first‐order chemical reaction and its reaction rate constant 7.3 ± 10 ‐3 /min (in terms of O 2 consumption) was determined in apple juice with added vitamin C. The simultaneous permeation‐diffusion reaction process was modelled by finite element block types developed by Swanson Analysis Systems. Inc. Houston, PA (Engineering Analysis Systems User's and Theoretical Manuals). Results indicate that the model generates acceptable predictions for a cylindrical, permeable package and a semi‐infinite system (oxygen‐saturated liquid surface).