Sorption isotherm modelling of chilgoza pine nuts (Pinus gerardiana)

Abstract

Modified forms of the Guggenheim-Anderson-de Boer model (mGAB), Halsey model (mHAL), Henderson model (mHEN) and Oswin model (mOSW) that incorporate a temperature term were selected and used to describe sorption isotherm experimental data of pine nuts that were obtained using the static gravimetric method at 15 °C, 25 °C and 40 °C. A series of goodness-of-fit indices with random and normal residual distributions, the statistical significance and the precision of the parameter estimates were examined to adequately evaluate the pine nut moisture sorption models. The mGAB model best described the sorption isotherms at individual temperatures. Moreover, with the lowest AICc values, the mHEN and mOSW models best differentiated the temperature effect in one-step modelling.