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Prediction of Sorptional Equilibrium Data for Starch‐Containing Foodstuffs
Author(s) -
CRAPISTE G. H.,
ROTSTEIN E.
Publication year - 1982
Publication title -
journal of food science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.772
H-Index - 150
eISSN - 1750-3841
pISSN - 0022-1147
DOI - 10.1111/j.1365-2621.1982.tb04970.x
Subject(s) - water content , water activity , white rice , phase equilibrium , equilibrium moisture content , starch , corn starch , moisture , chemical composition , chemistry , food science , phase (matter) , biological system , thermodynamics , mathematics , biology , physics , sorption , geotechnical engineering , organic chemistry , adsorption , engineering
Water accounting in a foodstuff can be done using water chemical potential to describe the equilibrium. Inspection of the structure of typical potato tissue leads to recognition of its intervening phases. Considering the chemical potential of water at each phase the corresponding amount of water can be predicted. Using these expressions and typical composition, the equilibrium water content of the foodstuff can be predicted with good agreement with experimental data. A number of correlations have been studied, concluding that the approach presented is the only one providing a good representation in the entire range of moisture contents. The method is extended to beans, white rice, peas and corn.