Measurement and modeling of moisture sorption isotherm of litchi (Litchi chinensis Sonn.)

Publication Type

Journal contribution

Authors

Janjai S; Lamlert N; Tohsing K; Mahayothee B; Bala B K; Müller J

Year of publication

2010

Published in

International Journal of Food Properties

Band/Volume

13/2

Page (from - to)

251-260

Keywords

Litchi, Modellbildung

doi:10.1080/10942910802331280

The equilibrium moisture contents of litchi (Litchi Chinensis Sonn.) were experimentally determined using the dynamic method at temperatures of 30, 40, and 50°C over a range of relative humidity values of 12 to 95%. Five models were tested to fit the experimental isotherm data of litchi. The GAB model fitted the best to experimental isotherm data. The agreement between experimental and predicted values of this model is excellent (RMSE 1.8 to 3.4%). The isosteric heats of sorption water were also determined from the equilibrium data using the Clausius-Clapeyron equation and it was found to be a function of equilibrium moisture content.