Predicting Water Activity in Solutions of Mixed Solutes |
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| Authors: | CS CHEN |
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| Affiliation: | Author Chen is with the Inst, of Food &Agricultural Sciences, Citrus Research &Education Center, Univ. of Florida, 700 Experiment Station Road, Lake Alfred, FL 33850. |
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| Abstract: | The Ross equation is a multiplicative procedure for estimating the water activity (aw) of aqueous unprocessed food preparations that contain only solutes, only food polymers, or mixtures of solutes and polymers. Using accurate aw values of single solute solutions in the Ross equation resulted in prediction accuracies to ± 0.01 aw for 118 of 120 multiple-solute solutions. The exceptions at ±0.02 aw occurred within a range of concentrated solutions containing NaCl, KCl, and CaCl2. |
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