Resumo

CORTES RODRIGUEZ, Misael; DAVILA MORENO, René Mauricio  e  GIL GONZALEZ, Jesús Humberto. Impregnation Solution Influence on the Pulp Color of Plantains (Musa paradisiaca). Rev. Fac. Nac. Agron. Medellín [online]. 2013, vol.66, n.1, pp.6949-6958. ISSN 0304-2847.

The influence of antioxidant (sodium metabisulphite Na₂S₂O₅ and ascorbic acid C₆H₈O₆) and acidulant (citric acid C₆H₈O₇) solutions on the color of vacuum impregnated green plantain pulp (GPP), stored (0, 3, 6, 9, 12 and 15 days; 4, 20 and 30 °C) and vacuum packed (VP) or packed without vacuuming (WV), was evaluated. The color was determined by the CIE-L*a*b* coordinates, where the lightness (L*) was the most important parameter for browning control (L*critical=70). Component concentrations in the impregnation solutions were established to achieve levels of sodium benzoate (1,000 mg), EDTA (75 mg) and sulphites (500, 1,000 y 1,500 mg), per kg of fresh GPP; and ascorbic acid (60, 90 and 120 mg) and citric acid (100, 150 and 250 mg), per 100 g of fresh GPP. Significant differences were seen (P<0.05) in L* regarding time and treatment, in which the temperature of 4 °C was the most adequate. Treatments with L*>L*critical for 15 days were: sodium metabisulphite (500 mg/kg of GPP, WV and 0 mg/kg of GPP, VP), ascorbic acid (90 mg/100 g of GPP, WV and 60 mg/100 g of GPP, VP), citric acid (100 mg/100 g of GPP, VP) and for the mixture of ascorbic acid (90 mg): citric acid (100 mg)/100 g of GPP, VP.

Palavras-chave : Lightness; sulphites; ascorbic acid; citric acid.

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