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The objective was to evaluate the effect of pretreatments of CaCl 2 and osmotic dehydration (OD) on oil absorption in plantain and cassava chips. Plantain and cassava slices (1 mm thickness and 35 mm diameter) were prepared. Pretreatment with and without 5% CaCl 2 solution before applying OD with sucrose solutions at 30 and 45%, and NaCl at 3 and 6% in a product/solution ratio of 1:25, at 40 °C were employed. OD kinetics and diffusivity were estimated by Page's model and Fick's law, respectively. Best OD treatments for plantain chips were 45% sucrose with CaCl 2 and 6% NaCl without CaCl 2 . However, for cassava chips, the best OD treatments were 45% sucrose without CaCl 2 and 3% NaCl with CaCl 2 . Page's model predicted the OD experimental results with an R 2  = 0.94-0.97. Effective diffusivity of water (EDW) and effective diffusivity of solids (EDS) for osmo-dehydrated cassava samples, with and without CaCl 2 , decreased as the concentration of the osmotic solutions was increased. However, in general, the inverse effect was obtained for plantain samples for EDW and EDS. Use of CaCl 2 when applying OD reduced EDW and EDS in plantain and cassava chips. In general, it was observed that when increasing the concentration of the osmotic solution, oil absorption capacity decreased. Treatments that showed the lowest oil absorption were 45% sucrose OD in plantain chips pretreated with CaCl 2 (11.49%) and fresh cassava chips with 45% sucrose OD (10.72%). The results and effectiveness will depend on food, process conditions and type of osmotic agent.

Influence of pretreatments on oil absorption of plantain and cassava chips