Grasas y Aceites, Vol 53, No 2 (2002)

Stability of potato chip fried in vegetable oils with different degree of unsaturation. Effect of ascorbyl palmitate during storage


https://doi.org/10.3989/gya.2002.v53.i2.304

L. Masson
Laboratorio de Química de Alimentos y Materias Grasas, Departamento de Ciencia de los Alimentos y Tecnología Química, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Chile

P. Robert
Laboratorio de Química de Alimentos y Materias Grasas, Departamento de Ciencia de los Alimentos y Tecnología Química, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Chile

M. C. Dobarganes
Instituto de la Grasa, CSIC, Spain

C. Urra
Laboratorio de Química de Alimentos y Materias Grasas, Departamento de Ciencia de los Alimentos y Tecnología Química, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Chile

N. Romero
Laboratorio de Química de Alimentos y Materias Grasas, Departamento de Ciencia de los Alimentos y Tecnología Química, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Chile

J. Ortiz
Laboratorio de Química de Alimentos y Materias Grasas, Departamento de Ciencia de los Alimentos y Tecnología Química, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Chile

E. Goicoechea
Facultad de Ciencias Agrarias, Universidad Austral de Chile, Chile

P. Pérez
Laboratorio de Química de Alimentos y Materias Grasas, Departamento de Ciencia de los Alimentos y Tecnología Química, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Chile

M. Salamé
Laboratorio de Química de Alimentos y Materias Grasas, Departamento de Ciencia de los Alimentos y Tecnología Química, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Chile

R. Torres
Facultad de Ciencias Agrarias, Universidad Austral de Chile, Chile

Abstract


Four vegetable oils with different polyunsaturated/saturated fatty acid ratio (P/S): 5.2 for sunflower oil, 3.,4 for canola rapeseed oil, 0.4 for a blend of palm oleic and canola rapeseed oil (80:20), and 0.3 for palm olein were assayed for stability of crisps fried in these oils during storage at 60º C. The action of ascorbyl palmitate with special attention to its synergistic effect on the natural antioxidants was also tested. by addition to the fried potatoes. The evolution of the oxidative stability was measured through peroxide value, quantitation of tocopherols and tocotrienols, and induction time (IT) by means of Rancimat. Oil degradation during frying was very low as both polar compound percentages and natural antioxidant had similar levels to those present in refined oils. Evolution of analytical parameters during storage results indicated that oil unsaturation degree or P/S had a much more importance on stability of the product than had the content and type of natural antioxidants and the addition of AP. Nevertheless, addition of AP to the fried potatoes had a significant effect resulting in higher retention of natural antioxidants, higher IT and lower PV at any storage time

Keywords


Ascorbyl palmitate; Potato chip; Stability; Storage; Synergism; Vegetable oils

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