DL-alfatocoferil acetato y temperatura en la cinética del índice de yodo y peróxido en aceite de semillas de calabaza (Cucurbita pepo L.)
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Date
2024
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Universidad Nacional de Trujillo
Abstract
Este trabajo de investigación tuvo por objetivo evaluar el efecto del DL-alfatocoferil acetato y la temperatura en la cinética del índice de yodo y peróxido en aceite de semillas de calabaza (Curcúbita pepo L.). Para ello se establecieron cuatro tratamientos del aceite de semillas de calabaza (T1: 0 % de DL-alfatocoferil acetato y 25 °C, T2: 0 % de DL-alfatocoferil acetato y 45 °C, T3: 0.025 % de DL-alfatocoferil acetato y 25 °C y T4: 0.025 % de DL-alfatocoferil acetato y 45 °C). En estas muestras se evaluaron los parámetros de índice de peróxido e índice de yodo durante un periodo de 150 días. Los resultados muestran que la adición del DL-alfatocoferil acetato provoca una mejor conservación de los parámetros del aceite. Además, el incremento de la temperatura, favorece su desnaturalización. Se determinó las constantes cinéticas k que fueron mayores en DL-alfatocoferil acetato, con un orden de reacción cero en todos los casos. La energía de activación determinada por la ecuación de Arrhenius mostró valores de 3.91 y 2.44 kcal/mol para índice de peróxidos e índice de iodo respectivamente. Finalmente, todos los tratamientos difirieron significativamente entre si (p < 0.05).
ABSTRACT This research work aimed to evaluate the effect of DL-alphatocopheryl acetate and temperature on the kinetics of the iodine and peroxide index in pumpkin seed oil (Curcúbita pepo L.). For this, four treatments of pumpkin seed oil were established (T1: 0 % DL-alphatocopheryl acetate and 25 °C, T2: 0 % DL-alphatocopheryl acetate and 45 °C, T3: 0,025 % DL-alphatocopheryl acetate and 25 °C and T4: 0,025 % DL-alpha-tocopheryl acetate and 45 °C). In these samples, the parameters of peroxide value and iodine value were evaluated over a period of 150 days. The results show that the addition of DL-alpha-tocopheryl acetate causes better conservation of the oil parameters. Furthermore, the increase in temperature favors its denaturation. The kinetic constants k was determined, which were higher in DL-alphatocopheryl acetate, with a zero-reaction order in all cases. The activation energy determined by the Arrhenius equation showed values of 3,91 and 2,44 kcal/mol for peroxide index and iodine index respectively. Finally, all treatments differed significantly from each other (p < 0,05).
ABSTRACT This research work aimed to evaluate the effect of DL-alphatocopheryl acetate and temperature on the kinetics of the iodine and peroxide index in pumpkin seed oil (Curcúbita pepo L.). For this, four treatments of pumpkin seed oil were established (T1: 0 % DL-alphatocopheryl acetate and 25 °C, T2: 0 % DL-alphatocopheryl acetate and 45 °C, T3: 0,025 % DL-alphatocopheryl acetate and 25 °C and T4: 0,025 % DL-alpha-tocopheryl acetate and 45 °C). In these samples, the parameters of peroxide value and iodine value were evaluated over a period of 150 days. The results show that the addition of DL-alpha-tocopheryl acetate causes better conservation of the oil parameters. Furthermore, the increase in temperature favors its denaturation. The kinetic constants k was determined, which were higher in DL-alphatocopheryl acetate, with a zero-reaction order in all cases. The activation energy determined by the Arrhenius equation showed values of 3,91 and 2,44 kcal/mol for peroxide index and iodine index respectively. Finally, all treatments differed significantly from each other (p < 0,05).
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Keywords
DL-alfatocoferil acetato, Cinética, Indice de peróxidos, Indice de iodo, Orden de reacción