Modelling moisture sorption isotherms for konjac based on different mathematical models

This study was designed for the equilibrium moisture content and moisture sorption isotherms for konjac by means of static-adjusting ambient humidity which based on adsorption theory. It was determined at different temperature 20, 30, 40℃ and different relative humidity ranging from 0% to 98%. Results showed that the isotherms of konjac exhibited Type II and the sorption capacity decreased with the increase of temperature at constant water activity. The experimental data were compared with eight widely recommended models by using the evaluation index of average relative error and coefficient of determination.Results indicated that the Peleg model appeared to be most suitable for fitting the moisture sorption isotherms data for the konjac.