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Methodology for determining the appropriate selectivity of mass transfer devices for modified atmosphere packaging of fresh produce
Author(s) -
Lee Laurence Z.,
Arul Joseph,
Lencki Robert,
Castaigne François
Publication year - 1996
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/(sici)1099-1522(199603)9:2<55::aid-pts357>3.0.co;2-8
Subject(s) - modified atmosphere , atmosphere (unit) , selectivity , mass transfer , materials science , chemical engineering , process engineering , chemistry , nanotechnology , chromatography , organic chemistry , food science , shelf life , engineering , physics , meteorology , catalysis
Perforations or polymeric membranes are not capable of simultaneously providing optimum O 2 and CO 2 levels for many fruits and vegetables contained in modified atmosphere packaging. However, combining these two gas transfer devices, either in series or in parallel, can provide the required gas selectivities to create optimal modified atmosphere conditions. A methodology for determining the perforation and membrane surface areas for individual and combined systems is described. Gradient diagrams are used to calculate the optimum system selectivity, Δ p O 2 and Δ p CO 2 . These values can be used to select the appropriate gas exchange devices and to determine the appropriate perforation and membrane surface area.