SORPTION ISOTHERMS AND NET ISOSTERIC HEAT OF SORPTION FOR PLUM OSMOTICALLY PRE-TREATED WITH TREHALOSE AND SUCROSE SOLUTIONS
Keywords:
plum, sorption isotherms, net isosteric heat, osmotic treatmentAbstract
Net isosteric heat of sorption can be used to determine the energy requirements of drying processes. Trehalose pre-treatments
have better effects on some quality properties such as colour, shrinkage and cell reconstruction of dried agricultural
materials. In this study, changing of moisture sorption isotherms and net isosteric heat of sorption for plum were determined
at 30, 40, 50, 60°C. Sorption isotherms were determined using standard static gravimetric method. The net isosteric heat was
determined by the application of the Clausius-Clapeyron equation to obtained sorption isotherms. Plum samples were pretreated
osmotically with trehalose and sucrose solutions with 20 and 50 Brix concentrations.
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