Evaluación del efecto de la irradiación en el contenido de vitamina C en Musa paradisiaca irradiada con una fuente de Cobalto 60.

Abstract

The incidence of irradiation in vitamin C in tropical fruit Musa paradisiaca, with a source of cobalt 60 was evaluated. The samples were irradiated with doses of O, 150, 250 and 300 Gy in an ILSHEPARD MODEL 109 60Co equipment, subsequently stored at 25 º C until the end of the study. The ascorbic acid was extracted by solvents in an acidic medium, under dim light and determined by high efficiency liquid chromatography (CLAE), on a Cl8 colurnn (5um particle diameter 120A º 4.6Xl50mm) and with a Uv-vis detector. Wavelength = 254 nm. The total sugars were determined by the refractometry method. The irradiated fruit hada firm texture until the end of the study, tanned skin attributed to the increase in the polyphenol oxidase enzyme. The delay was observed at two and one point on the Loesecke maturation scale at 20 days and 23 days post-irradiation respectively. The total content of sugars was lower than the content of the control sample without statistically significant differences in ali the treatments. The samples irradiated in ali the doses maintained a high content of vitamin C (mg / 1OOg) compared to the control samples, the val u es obtained during the treatment did not present statistically significant differences (t-student for 2 independent variables unilaterally p = 0.05 ); However, from IL = 5, the irradiated samples show statistically significant differences in the treatment of250 Gy (7.49 mg / 100 g) and 300 Gy (1.62 mg / 100 g) when compared to the target (0.24 mg). / lOOg). According to the study, it is recommended to study the effect of irradiation from IL = 4, by showing that at this stage of maturity there are significant differences between the fruit lrradiated and non-irradiated.