Moisture sorption isotherms and isosteric heat determination in Chilean papaya (Vasconcellea pubescens)

Quimica nova

Passaro, Catarina¹  Vega-Gálvez, Antonio²  Palacios, Marlene²  Lemus-Mondaca, Roberto² 

[1] Corporación Colombiana de Investigaciones Agrarias, Antioquía, Colombia;Universidad de La Serena, La Serena, Chile

关键词: Chilean papaya;    sorption isotherms;    isosteric heat.;   

DOI  :  10.1590/S0100-40422008000600026

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

The moisture sorption isotherms of Chilean papayawere determined at 5, 20, and 45 ºC, over a relative humidity range of 10-95%.The GAB, BET, Oswin, Halsey, Henderson, Smith, Caurie and Iglesias-Chirife modelswere applied to the sorption experimental data. The goodness of fit of the mathematicalmodels was statistically evaluated by means of the determination coefficient,mean relative percentage deviation, sum square error, root-mean-square error,and chi-square values. The GAB, Oswin and Halsey models were found to be themost suitable for the description of the sorption data. The sorption heats calculatedusing the Clausius-Clapeyron equation were 57.35 and 59.98 kJ·mol-1,for adsorption and desorption isotherms, respectively.

【 授权许可】

CC BY