
handle: 2434/923042
Características físico-químicas y estabilidad oxidativa de aceites de diferentes ecotipos de ricino peruano. El objetivo de esta investigación fue estudiar las propiedades fisicoquímicas y la vida útil de aceite de ricino extraido a presión a dos temperaturas (60 y 80 °C) de cinco ecotipos peruanos. Se notó u na amplia variación para todas las características. Se observaron bajos índice de acidez, bajo índice de peróxido y ausencia de p-anisidina. El contenido total de tocoferoles osciló entre 798 y 1040 mg/kg. Se detectó una mayor capacidad antioxidante en los extractos en metanol que en los extractos en hexano. A partir del Rancimat realizado a 150-170 °C, la vida útil prevista a 25 °C osciló entre 0.15 y 8.93 años; la mayor temperatura de extracción condujo a una vida útil más larga, probablemente debido a inactivación de las enzimas.
The aim of this research was to assess the physico-chemical properties and shelf-life of press-extracted oils at two temperatures (60 °C and 80 °C) from five Peruvian castor bean ecotypes. A wide variation for all traits was observed. Low acidity index, low peroxide index and absence of p-anisidine were recorded. The total tocopherol contents ranged from 798 to 1040 mg/kg. A higher antioxidant capacity was detected in methanolic extracts than in the hexane extract. From the Rancimat performed at 150-170 °C, the predicted shelf-life at 25 °C ranged from 0.15 to 8.93 years; the higher extraction temperature led to a longer shelf-life, probably because of enzyme inactivation.
antioxidant capacity; fatty acids; Rancimat; Ricinus communis; Tocols; ácidos grasos; capacidad antioxidante; Rancimat; Ricinus communis; Tocoles
antioxidant capacity; fatty acids; Rancimat; Ricinus communis; Tocols; ácidos grasos; capacidad antioxidante; Rancimat; Ricinus communis; Tocoles
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