Effects of Different Storage Conditions on the Oxidative Stability of Crude and Refined Palm Oil, Olein and Stearin (Elaeis guineensis)
Author
De Almeida, Deusdélia Teixeira
Vieira Viana, Thaís
Melo Costa, Mariana
de Santana Silva, Cintia
Feitosa, Sabrina
Estadisticas
Publicación:
Revista Palmas; Vol. 41 Núm. 3 (2020); 67-80
0121-2923
Revista Palmas; Vol. 41 Núm. 3 (2020); 67-80
0121-2923
Abstract
Crude palm oil (CPO), refined palm oil (RPO), refined palm olein (RPOL) and refined palm stearin (RPS) were stored in three conditions: kept away in dark (at 20-25 °C, acclimatized environment); in a refrigerator (4-8 °C); and at room temperature (26-32 °C), exposed to natural light. Free fatty acids (FFA; %), peroxide value (meq O2/kg), induction period (h), total carotenoids (ppm) and color measurements (CIELab) were analyzed to determine stability of oils every months until 12 months. All of the crude/refined initial oils were of good quality, except for one sample of CPO. Storage at 26-32 °C and exposure to light intensified the oxidative reactions. The estimated shelf life of CPO, RPO, RPOL and RPS, when stored at 20-25 °C and in the dark, would be approximately 6, 9, 9 and 12 months, respectively. The best quality oils was found stored at 4-8 °C when compared to those stored in other storage conditions. Practical Application: The study has an influence for practice of the storage, a storage time and conditions, in addition to discuss to most important criteria to get quality products. Palm oil is widely used due to its high stability and considering the cultural and public health importance of consuming. Se almacenó aceite de palma crudo (APC), aceite de palma refinado (APR), oleína de palma refi- nada (OPR) y estearina de palma refinada (EPR), en tres condiciones: en la oscuridad (a 20-25 °C, en un entorno aclimatado), en un refrigerador (4-8 °C) y a temperatura ambiente (26-32 °C) expuestos a la luz natural. Se analizaron los ácidos grasos libres (% AGL), el valor del peróxido (meq O2/kg), el periodo de inducción (h), los carotenoides totales (ppm) y las mediciones de color (CIELab), para determinar la estabilidad de los aceites cada mes hasta los 12 meses. Todos los aceites crudos/ refinados iniciales eran de buena calidad, excepto por una muestra de APC. El almacenamiento a 26-35 °C y la exposición a la luz aceleraron las reacciones oxidativas. La vida útil estimada del APC, APR, OPR y EPR almacenados a 20-25 °C y en la oscuridad fue de aproximadamente de 6, 9, 9 y 12 meses, respectivamente. Se encontraron aceites de mejor calidad almacenados a 4-8 °C, en comparación con los conservados en otras condiciones.
Aplicación práctica: el estudio tiene influencia sobre las prácticas, tiempos y condiciones de almacena- miento, además de discutir los criterios más importantes para obtener productos de calidad. El aceite de palma es utilizado ampliamente debido a su alta estabilidad y por considerar su consumo de importancia cultural y para la salud pública.
Crude palm oil (CPO), refined palm oil (RPO), refined palm olein (RPOL) and refined palm stearin (RPS) were stored in three conditions: kept away in dark (at 20-25 °C, acclimatized environment); in a refrigerator (4-8 °C); and at room temperature (26-32 °C), exposed to natural light. Free fatty acids (FFA; %), peroxide value (meq O2/kg), induction period (h), total carotenoids (ppm) and color measurements (CIELab) were analyzed to determine stability of oils every months until 12 months. All of the crude/refined initial oils were of good quality, except for one sample of CPO. Storage at 26-32 °C and exposure to light intensified the oxidative reactions. The estimated shelf life of CPO, RPO, RPOL and RPS, when stored at 20-25 °C and in the dark, would be approximately 6, 9, 9 and 12 months, respectively. The best quality oils was found stored at 4-8 °C when compared to those stored in other storage conditions. Practical Application: The study has an influence for practice of the storage, a storage time and conditions, in addition to discuss to most important criteria to get quality products. Palm oil is widely used due to its high stability and considering the cultural and public health importance of consuming.
Palabras clave:
Crude palm oil
olein
stearin
storage
aceite crudo de palma
oleína
estearina
almacenamiento
Crude palm oil
olein
stearin
storage
aceite crudo de palma
oleína
estearina
almacenamiento