Abstract
The equilibrium moisture contents were determined for seeds of four tobacco varieties using gravimetric static method at 15, 25 and 40°C over a range of relative humidities from 0·112 to 0·856. The sorption capacity of all the varieties investigated, decreased with an increase in temperature at constant relative humidity. Each variety had a statistically significant effect on the sorption characteristics. Five models were applied for analysing the experimental data using the following equations: modified Chung–Pfost; modified Halsey; modified Oswin; modified Henderson and GAB (Guggenheim–Anderson–de Boer). The GAB model was found to be the most suitable for describing the relationship among equilibrium moisture content, relative humidity and temperature.
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