Frying Stability of Moringa stenopetala Seed Oil
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The frying performance of Moringa stenopetala seed oil (extracted with cold press or n-hexane) was studied especially as regards repeated frying operations. The oils were used for intermittent frying of potato slices and cod filets at a temperature of 175 °C for 5 consecutive days (5 fryings per day). The chemical changes occurring in oils were evaluated. Free fatty acid content, polar compounds, colour and viscosity of the oils all increased, whereas the iodine value, smoke point, polyunsaturated fatty acid content, induction period and tocopherol content decreased. The effect of the oil on the organoleptic quality of these fried foods and the theoretical number of frying operations possible before having to discard the oil was also determined. The analytical and sensory data showed that the lowest deterioration occurred in cold press produced oil.
Key words:Cod Frying stability Moringa stenopetala Potatoes Seed oil
This research was funded by European Union (CEC contract No: TS3 * CT-94-0399 for Developing Countries).
- 3.Kiritsakis A (1989) Tocopherols. In: Kafatos A (ed), The Olive Oil. Thessaloniki, Greece: Agricultural Co-operative Editions, pp 61–64 and 234.Google Scholar
- 4.Kiritsakis A, Min DB (1989) Flavour chemistry of olive oil. In: Min DB (ed) Flavour Chemistry of Lipid Foods. Illinois, USA: The American Oil Chemists’ Society, pp 196–221.Google Scholar
- 6.AOAC (1990) Official Methods of Analysis, 15th edn. Arlington, Virginia, USA: Association of Official Analytical Chemists.Google Scholar
- 7.Standard methods for the analysis of oils, fats and derivatives (1987) In: Paquot C, Hautfenne A (eds), International Union of Pure and Applied Chemistry (IUPAC), 7th edn. London, UK: Blackwell Scientific Publications, pp 212–213.Google Scholar
- 8.Sonntag NOV (1982) Analytical methods. In: Swern DE (ed) Bailey's Industrial Oil and Fat Products 2, 4th edn, New York, USA: Wiley, pp 407–527.Google Scholar
- 9.Pearsons D (1981) Chemical Analysis of Foods, 8th edn. Edinburgh, UK: Churchill Livingstone.Google Scholar
- 10.Tsaknis J, Spiliotis V, Lalas S, Gergis V, Dourtoglou V (1999) Quality changes of Moringa o leifera, variety Mbololo of Kenya seed oil during frying. Grasas Aceites 50: 37–48.Google Scholar
- 15.Gutierrez R, Gonzalez O, Dobarganes MC (1988) Analytical procedures for the evaluation of used frying fats. In: Varela G, Bender AE, Morton ID (eds) Frying Food: Principles, Changes, New Approaches, London, UK: VCH Publishers Ltd, pp 141–154.Google Scholar
- 16.Burton WG (1989) The Potato, 3rd edn. New York: Wiley.Google Scholar
- 17.Sonntag NOV (1991) Erucic, behenic: Feedstocks of the 21st century. Inform 2: 449–463.Google Scholar
- 18.Morton ID, Chidley JE (1988) Methods and equipment in frying. In: Varela G, Bender AE, Morton ID (eds) Frying Food: Principles, Changes, New Approaches, London, UK: VCH Publishers Ltd, pp 37–51.Google Scholar