The effects of the sucrose and calcium lactate concentrations on the osmotic dehydration kinetics of
pineapple, and the diffusivity of each component were investigated. The color, water activity, texture and
fruit composition were also evaluated. Osmotic dehydration was carried out using 40% and 50% sucrose
solutions with added 0%, 2% or 4% calcium lactate for 1, 2, 4 and 6 h of processing time. In general, the gain
in calcium was greater in samples submitted to solutions with higher sucrose and calcium lactate concentrations.
The greatest calcium contents (90 mg/100 g) were reached after 6 h of impregnation in both 40%
and 50% sucrose solutions containing 4% calcium lactate. The addition of calcium to the osmotic solution
reduced the water content of the product and solute incorporation rate, inhibiting sucrose impregnation
and increasing process efficiency. The addition of 4%calcium lactate to the solution increased all diffusivities
in comparison to the addition of 2% but not in relation to treatments with no added calcium. Calcium
impregnation did not influence the color of the product or the value for stress at rupture, as compared to
raw pineapple. The diffusion coefficients presented in this work permitted the selection of the appropriate
sucrose and calcium concentrations and the calculation of the processing time to give the desired product
composition.