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MODELING FREQUENCY DISTRIBUTION of STEADY‐STATE O 2 PARTIAL PRESSURES IN MODIFIED‐ATMOSPHERE PACKAGES
Author(s) -
TALASILA P.C.,
CAMERON A.C.
Publication year - 1995
Publication title -
journal of food process engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.507
H-Index - 45
eISSN - 1745-4530
pISSN - 0145-8876
DOI - 10.1111/j.1745-4530.1995.tb00363.x
Subject(s) - modified atmosphere , partial pressure , atmosphere (unit) , steady state (chemistry) , analytical chemistry (journal) , range (aeronautics) , distribution (mathematics) , chemistry , thermodynamics , materials science , mathematics , physics , chromatography , composite material , mathematical analysis , oxygen , food science , organic chemistry , shelf life
A mathematical model was developed to predict the frequency distribution of steady‐state O 2 partial pressures in modified‐atmosphere packages of fresh and minimally processed fruits and vegetables. Variation in O 2 uptake was predicted to have relatively larger influence on the package O 2 distribution than variation in film permeability to O 2 . the model also predicted that the range of O 2 partial pressures in the packages would be larger for the products with lower K 1/2 (a constant in product O 2 uptake equation) values. the percent deviation of package O 2 partial pressures from [O 2 ] med increased with [O 2 ] med up to about 3 kPa and gradually decreased thereafter. Package O 2 distribution was symmetrical at higher [O 2 ] med but became gradually asymmetrical with decreasing [O 2 ] med from 6 kPa. the model was used to predict target [O 2 ] med for the design of modified‐atmosphere packages for different probability levels of having package O 2 being equal to or less than a minimum tolerable level of the product.