Moisture sorption isotherms - Experimental and mathematical investigations of orange (Citrus sinensis) peel and leaves

► Determination of the chemical composition of Citrus sinensis peel and leaves of the “Maltaise” variety. ► Experimental determination of the desorption and adsorption isotherms of the orange peel and leaves at 40, 50 and 60 °C. ► Mathematical modelling of the experimental data. ► Peleg model: the best model for fitting the experimental data of desorption and adsorption isotherms at 40, 50 and 60 °C. ► Calculation of the net isosteric heats of desorption and adsorption for different moisture contents.