WATER ACTIVITY IN SOLUTIONS CONTAINING ORGANIC-ACIDS

Authors
VELEZMORO CE MEIRELLES AJA
Citation
Ce. Velezmoro et Aja. Meirelles, WATER ACTIVITY IN SOLUTIONS CONTAINING ORGANIC-ACIDS, Drying technology, 16(9-10), 1998, pp. 1789-1805
Citations number
14
Categorie Soggetti
Engineering, Chemical","Engineering, Mechanical
Journal title
Drying technology → ACNP
ISSN journal
07373937
Volume
16
Issue
9-10
Year of publication
1998
Pages
1789 - 1805
Database
ISI
SICI code
0737-3937(1998)16:9-10<1789:WAISCO>2.0.ZU;2-N
Abstract
A thermodynamic model for the activity coefficient was used to predict a(w) in some food-related solutions. Water activity values for organi c acids solutions (malic, tartaric and citric) were measured experimen tally and used to adjust interaction parameters for the UNIFAC model. The partial dissociation phenomenon for weak electrolytes in aqueous s ystems was considered and concentrations of species were calculated. P redictions of a(w) with mean deviations of 0.26% were obtained.