Production of mango pulps Tommy Atkins in Septentrional Amazon through application of preservatives and of blanching.
Neves L. C., Benedette R. M., Silva V. X. da, Prill M. A. de S., Vieites R. L.
Author Affiliation: UFRR - Prof. Depto de Fitotecnia - Centro de Ciências Agrarias, Km 12 BR174 s/no, CEP 69301-970, Boa Vista-RR, Brazil.
Revista Brasileira de Fruticultura 29 : 576-582
Abstract : The present work had evaluated the efficiency of the pasteurization and the use of preservatives in mangos pulps (Mangifera indica) refrigerated. Before carrying out the treatments, the fruits had been cleaned in solution of sodium hypochlorite (NaOCl) at 100 mg.L-1, for 10 minutes. After the processing, it was carried out through the adjustment of pH of pulps for 3.0 and the adjustment of the water activity (Wa) at 0.95. The used variable had been the blanching (hot water at 95±5°C, for 0 and 1 minute), the addition of sodium benzoate in the concentrations of 0; 200 and 500 mL.L-1 and, sulfite dioxide (SO2) in 0, 100 and 200 mL.L-1. Then the pulps had been packed in low density polyethylene (LDPE) bags of 0,060 mm (0.10×0.12 m - without free space and content of 500 g of pulp) and, conditioned in at 20±1°C e 80±3% of R.H, for 28 days. At the end of the experiment, the treatments not submitted to the blanching showed the highest ascorbic acid levels. However, in these same treatments, intense microbiological activity and raised levels of pH were observed. There are no significant differences between the tested treatments in terms of titratable acidity (TA) and soluble solids (SS) analyses. Due to the absence of black spot in the pulps used during all the experimental period, the differences between the application of the SO2 and the use of the blanching could not be detected. The lower index of microbiological contamination and the preference of the judges in the sensorial panel had been attributed to the submitted treatments to the blanching, addition of 500 ml litre-1 of sodium benzoate and addition of 200 ml litre-1 of sulfite dioxide.