Resumo

ZAPATA M, José E; ARIAS A, Johan M  e  CIRO G, Gelmy L. Optimization of osmotic dehydration of pineapple (Ananas comosus L.) using the response surface methodology. Agron. colomb. [online]. 2011, vol.29, n.2, pp.441-448. ISSN 0120-9965.

The response surface methodology was used to optimize the effects of temperature (25 - 45°C) and citric acid concentration (0.5 - 2.5% w/w) in osmotic dehydration of pineapple in a sucrose solution. A 3² factorial design was used with weight loss (WL, %), moisture loss (ML, %) and solid gain (SG, %) as responses. The models obtained for all the responses were significant (P=0.05) without a significant lack of fit. The results suggest that WL, ML and SG can reach 42.62%, 36.54% and 292.16% respectively, after 4 to 6 h of the process, with 100% sensory acceptance and reductions in microbial counts of more than two log cycles, using the conditions defined by the optimization (44.99°C and 2.48% citric acid)

Palavras-chave : citric acid; osmotic drying; post harvest; fruit.

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