Palm oil is the second largest vegetable oil in terms of world production. Besides, red palm oil (RPO) is nonhydrogenated, has a high oxidative stability and contains high levels of natural antioxidants, such as carotenoids. The main objectives of this study were to study acrolein emissions during deep-frying operations, as an indicator of potentially toxic volatile compounds, and to evaluate the importance of French fries (fried with red palm oil) as an extra source of carotenoids in the diet. The acrolein emission rates from mono-unsaturated oils, such as red palm and olive oils, were much lower than that of poly-unsaturated oils, sunflower. The total carotenoid content of red palm oil, 480 mg/L, makes this oil perfect for developing functional foods round the world and gives the oil a high oxidative stability and long shelf life. Sensory tests proved that RPO French fries were scored positively by regular consumers. Their color was initially considered unusual and got low scores; however, when the flavor was evaluated RPO fries got higher scores than olive or sunflower fries. RPO proved to generate low amounts of potentially toxic volatiles, acrolein, and be an excellent source carotenoids.
Aenor (1997). Sensory Evaluation of Food. UNE standards. Madrid, Spain: AENOR.
2.
Al Hooti S.N., Sidhu J.S., Al Saqer J.M., Al Amiri H.A., Al Othman A., Mansour I.B. and Johari M. (2004). Developing functional foods using red palm olein: objective color and instrumental texture. International Journal of Food Properties7: 15-25.
3.
Alvarez M.D., Morillo M.J. and Canet W. (2000). Characterization of the frying process of fresh and blanched potato strips using response surface methodology. European Food Research and Technology211: 326-335.
4.
Andreu-Sevilla A., Hartmann A., Sayas E., Burló-Carbonell F., DelgadoEstrella P., Valverde J.M. and Carbonell-Barrachina A.A. (2007). Mathematical quantification of total carotenoids in Sioma oil using color coordinates and multiple linear regression during deep-frying simulations. European Food Research and Technology226: 1283-1291.
5.
Chiang T.A., Wu P.F., Wang L.F., Lee H., Lee C.H. and Ko Y.C. (1997). Mutagenicity and polycyclic hydrocarbon content of fumes from heated cooking oils produced in Taiwan. Mutation Research381: 157-161.
6.
Darnoko D., Cheryan M., Moros E., Jerrel J. and Perkins E.G. (2000). Simultaneous HPLC analysis of palm carotenoids and tocopherols using a C-30 column and phtodiode array detector. Journal of Liquid Chromatography & Related Technologie23: 1873-1885.
7.
FNBIM (Food and Nutrition Board, Institute of Medicine). (2000). Dietary Reference Intakes for Vitamin C, Vitamin E, Selenium and Carotenoids. Washington DC: National Academy Press.
8.
FNBIM (Food and Nutrition Board, Institute of Medicine. (2002). Dietary Reference Intakes for Vitamin A, Vitamin K, Arsenic, Boron, Chromium, Copper, Iodine, Iron, Manganese, Molybdenum, Nickel, Silicon, Vanadium, and Zinc. Washington DC: National Academy Press.
9.
Fullana A., Carbonell-Barrachina A.A. and Sidhu S. (2004a). Comparison of volatile aldehydes present in the cooking fumes of extra virgin olive, olive, and canola oils. Journal of Agricultural and Food Chemistry52: 5207-5214.
10.
Fullana A., Carbonell-Barrachina A.A. and Sidhu S. (2004b). Volatile aldehyde emissions from heated cooking oils. Journal of the Science of Food and Agriculture84: 2015-2021.
11.
Horwitz W. (2000). Officials Methods of Analysis of AOAC International . 17th edn, Gaithersburg, MD : AOAC International.
12.
Iupac (1992). Standard Methods for the Analysis of Oils, Fats and Derivatives. 7th edn, Oxford, UK: Pergamon Press .
13.
Leitz G. and Henry C.J.K. (1997). A modified method to minimise losses of carotenoids and tocopherols during HPLC analysis of red palm oil. Food Chemistry60: 107-117.
14.
Márquez G. and Añón M.C. (1986). Influence of reducing sugars and amino acids in the color development of fried potatoes. Journal of Food Science51: 157-160.
15.
Meilgaard M., Civille G.V. and Carr B.T. (1999). Sensory Evaluation Techniques. 3rd edn, Boca Raton, FL: CRC Press .
16.
Meléndez-Martínez A.J., Vicario I.M. and Heredia F.J. (2007). Provitamin A carotenoids and ascorbic acid contents of the different types of orange juices marketed in Spain. Food Chemistry101: 177-184.
17.
Minolta. (1994). Precise Color Communication. Color Control from Feeling to Instrumentation. Osaka, Japan: Minolta, Co. Ltd.
18.
Moyano P.C. and Pedreschi F. (2006). Kinetics of oil uptake during frying of potato slices: effect of pre-treatments. Lebensmittel Wissenschaf und Technologie39: 285-291.
19.
Ng J.H. and Tan B. (1988). Analysis of palm oil carotenoids by HPLC with diode-array detection. Journal of Chromatographic Science26: 463-469.
20.
Pedreschi F., Moyano P., Kaack K. and Granby K. (2005). Color changes and acrylamide formation in fried potato slices. Food Research International38: 1-9.
21.
Pérez-López A., Beltrán F., Serrano-Megias M., Saura D. and Carbonell-Barrachina A.A. (2006). Changes in orange juice color by addition of mandarin juice. European Food Research and Technology222: 516-520.
22.
Ping B.T.Y. and May C.Y. (2000). Valuable phytonutrients in commercial red palm olein. Palm Oil Developments32: 20-25.
23.
Reddy V. (2000). Comments on the development of high-carotene foods with the use of biotechnology. Food and Nutrition Bulletin21: 247.
24.
Rodriguez-Amaya D.B. (2001). A Guide to Carotenoid Analysis in Foods. Washington DC: ILSI Press.
25.
Schroeder M.T., Miquel-Becker E. and Skibsted L.H. (2006). Molecular mechanism of antioxidant synergism of tocotrienols and carotenoids in palm oil. Journal of Agricultural Food and Chemistry54: 3445-3453.
26.
Talbot G., Zand I. ( 2006). Increased industrial use of palm oleine. Food Engineering & Ingredients8: 34-35.
27.
Tan B., Grady C.M. and Gawienowski A.M. (1986). Hydrocarbon carotenoids profiles of palm oil processed fraction. Journal of the American Chemical Society63: 1175-1179.
28.
Umano K. and Shibamoto T. (1987). Analysis of acrolein from heated cooking oils and beef fat. Journal of Agricultural Food and Chemistry35: 909-912.
29.
van Stuijvenberg M.E., Faber M., Dhansay M.A., Lombard C.J., Vorster N. and Benadé A.J.S. (2000). Red palm oil as a source of β-carotene in a school biscuit used to address vitamin A deficiency in primary school children . International Journal of Food Sciences and Nutrition51: S43-S50.
30.
Wan P.J., Pakarinen D.R. and Miscella Sr R.J. (1996). Refining test for the determination of cottonseed oil color. Journal of the American Chemical Society73: 815-817.
31.
Yasuhara A. and Shibamoto Y. (1991). Determination of acrolein evolved from heated vegetable oil by N-methylhydrazine conversion. Agricultural and Biological Chemistry55: 2639-2640.
