Resumo

ZAMBRANO, Judith et al. Effect of blanching and preservative addition on the quality of the mango pulp type ‘bocado’ stored under refrigeracion1. Agronomía Trop. [online]. 2008, vol.58, n.3, pp.257-265. ISSN 0002-192X.

The effect of steam blanching with preservative addition on the chemical, rheological and organoleptic properties of mango pulp type ‘Bocado’, stored at 0 ± 0,5 °C was studied. Fully mature undamaged mango fruits were used. Half of the fruits (N= 100) was treated with steam blanching during 6 min, the other half was left unblanched, later the pulp was extracted. Citric acid 0,3% and sodium benzoate 0,1% were added to half of the pulp. Then the pulp was packed in polyethylene bags (150 g per bags), vacuum sealed and stored. Evaluations of the following parameters: acidity, total soluble solids (TSS), total and reducing sugars, ascorbic acid, total carotenoids, rheological measurements and sensorial evaluation were made at 0, 30, 60, 90 and 120 days of storage. A significant effect was observed of the combined treatments on chemical parameters with evident differences in the blanched pulp with respect to unblanched pulp, as well as the addition or not of preservatives. The values of n revealed the behavior of the pseudoplastic fluids. Sensorial evaluation favored blanched mango pulp with preservative addition. In conclusion blanching mangoes during 6 min and the addition of preservatives allows the preservation of pulps with acceptable chemical charac­teristics and sensory quality.

Palavras-chave : Mango pulp; quality; blanching; preser­vatives; refrigerated storage.