Immersion time
Keeping the concentration of the solution constant, the increase of the immersion time resulted in the increase of
water loss, but the rate of increase was decreased. Studies on the optimization of duration of osmosis process
indicated that mass exchange took place at the maximum rate within the first two hrs of the osmotic treatment.
Tiwari and Jalali (2004) reported that during osmotic dehydration of mango and pineapple increase in osmotic
duration resulted in increase in weight loss, but the rate of which occurs decreases. Gaspartero et al. (2003) and
Mauro et al. (2004) reported that when banana and apple slices dipped in 70 and 50 0Brix respectively, osmotic
solution temperature of 50 0C for 3 hrs immersion time gave optimum water loss and sugar gain.