Effects of Continuous Deep-fat Frying on the Physicochemical Properties of Assorted Brands of Edible Cooking Oils Sold in Greater Metropolitan Kampala
Asian Journal of Applied Chemistry Research,
Aims: To investigate the effects of continuous deep fat frying of white (Irish) potatoes on the physical and chemical attributes of ten brands of edible cooking oils: Fortune Butto, Roki, Tamu, Best Fry, Mukwano, Golden Fry (hard oils); Sunseed, Sunny, Sunvita and Sunlite (soft oils) sold in Kampala, Uganda.
Place and Duration of the Study: Oil samples of approximate manufacturing dates were obtained from Mega Standard supermarket in Greater Metropolitan Kampala, Uganda. Oil samples were also obtained from local Irish potato fryers in Makindye division of Kampala during ten deep frying cycles. Irish potatoes was procured from Nakasero market, Kampala. Physicochemical analyses were performed at the Quality Control Laboratory of Mukwano Industries Limited, Kampala Industrial area, Kampala. The research was conducted between May 2018 to December 2018.
Methodology: 400g of Irish potato slices (1cm × 1cm × 3cm) were submersed in 1500mL of oil maintained at 140°C for 6 minutes in an Electric Deep Fryer with a frying time of 10 minutes.The color value (CV) and the acidification of the oils as free fatty acid (FFA), peroxide value (POV), paraanisidine value (AnV), iodine adsorption value (IV) and total oxidation (TOTOX) value before and between ten successive frying cycles were determined using ISO and AOCS official methods.The maximum number of reuses of an oil was estimated from the frying round before its POV or AnV surpassed the maximum permissible statutory or Codex Alimentarius limit for edible oils.
Results: For fresh oils, the statistical physicochemical parameter ranges were: CV (0.4R 3.4Y-7.7R 70Y), FFA (0.0430±0.30-0.1508±0.30), POV (0.5951±0.03-6.6134±0.23 meqO2/Kg), AnV (0.90±0.01-4.30±0.19) and IV (57.62±0.17-128.35±0.02gI2/100g). By the 10th fry, the ranges were CV (3.0R 23Y-20.4R 70Y), FFA (0.2286±0.01-0.4817±0.01), POV (11.1138±0.01-15.7525±0.01meqO2/Kg), AnV (10.31±0.03-22.16±0.01) and IV (53.66±0.01-126.03±0.02gI2/100g). Considering oxidizability as TOTOX values, frying stability of the selected brands of cooking oils during the frying cycles followed the order: Roki > Fortune Butto > Sunvita > Sunny > Sunlite > Mukwano > Tamu > Best Fry > Golden Fry > Sunseed.
Conclusion: Reuse of the oils for continuous frying of Irish potatoes on the same day can be done only up to 7 times on average for hard oils and 6 times for soft oils with the oils still regarded as safe for human consumption. Hard oils should be preferred to soft oils for deep frying of Irish potato chips.Further research should elucidate the variation of physicochemical properties of other oil brands on the Ugandan market such as Nile, Fortune, Kimbo, Star Fry, Cow boy and Ufuta and should use other food samples such as fish, cassava, chicken, sweet plantain, dough, meat and edible grasshoppers.
- Color index
- free fatty acids
- iodine absorption value
- paraanisidine value
- peroxide index
How to Cite
Peers KE, Swoboda PAT. Deterioration of sunflower seed oil under simulated frying conditions and during small-scale frying of potato chips. J Sci Food Agric. 1982;33: 389–95. Available:https://doi.org/10.1002/jsfa.2740330414
Cuesta C, Sanchez-Muniz FJ, Garrido-Polonio C, Lopez-Varela S, Arroyo R. Thermooxidative and hydrolytic changes in sunflower oil used in frying with a fast turnover of fresh oil. J Amer Oil Chem Soc. 1993;70:1069–73.
Sanchez-Muniz FJ, Cuesta C, Lopez-Varela MC, Garrido-Polonio MC, Arroyo R. Evaluation of the thermal oxidation rate of sunflower oil using various frying Methods. In: Applewhite TH, editor. Proceedings of World conference on oilseed and technology and utilization. Champaign, Ill: American Oil Chemists Society; 1993.
Houhoula DP, Oreopoulou V, Tzia C. The effect of process time and temperature on the accumulation of polar compounds in cottonseed oil during deep-fat frying. J Sci Food Agric. 2003;83(4),314–19. Available:https://doi.org/10.1002/jsfa.1314
Baby Latha R, Nasirullah. Physico-chemical changes in rice bran oil during heating at frying temperature. J Food Sci Tech. 2014;51:335-40.
Diop A, Ndao S, Cissé M, Baldé M, Ndiaye B, Diop YM. Effect of deep-fat frying on chemical properties of edible vegetable oils used by senegalese households. Afr J Food Agric Nutr Dev. 2014;14(6):9418-38. Available:https://www.ajol.info/index.php/ajfand/article/view/109767/99516
Xu T, Li J, Fan Y, Zheng T, Deng Z. Comparison of oxidative stability among edible oils under continuous frying conditions. Int J Food Prop. 2015;18: 1478–90. Available:https://www.tandfonline.com/doi/ci-edby/10.1080/10942912.2014.913181?scroll=top&needAccess=true
Abdulkarim SM, Long K, Lai OM, Muhammad SKS, Ghazali HM. Frying quality and stability of high-oleic Moringa oleifera seed oil in comparison with other vegetable oils. Food Chem. 2007;105: 1382–89. Available:https://doi.org/10.1016/j.foodchem.2007.05.013
AOCS official method Ca 5a-40. Free fatty acids. American Oil Chemists’ Society; 2009.
ISO. Animal and Vegetable Fats and Oils- Determination of Iodine Value. ISO 3961: 2009. 4th Edn. 2009, Geneva, Switzerland.
ISO. Animal and vegetable fats and oils-determination of peroxide value. ISO 3960: 2007. 2007, Geneva, Switzerland.
AOCS. AOCS. p-Anisidine value. In: AOCS official method Cd 18-90: Official methods and recommended practices of the American oil chemists’ society. Champaign, IL, USA; 1998.
Shahidi F, Wanasundara UN. Methods for measuring oxidative rancidity in fats and oils. In: Food lipids: Chemistry,Nutrition, and Biotechnology; Akoh CC, Min DB, Eds. Marcel Dekker Inc: New York, 2002; 465–482.
Pereira de Abreu DA, Paseiro Losada P, Maroto J, Cruz JM. Evaluation of the effectiveness of a new active packaging film containing natural antioxidants (From Barley Husks) that retard lipid damage in frozen Atlantic Salmon (Salmo salar L.). Food Res Int. 2010;43(5):1277–82. Available:http://dx.doi.org/10.1016/j.foodres.2010.03.019
Gutierrez R, Gonzalez-Quijano J and Dobermans MC. Analytical procedures for the evaluation of used frying fats. In: Varela G, Bender AE, Morton ID (Eds.), Frying of food: Principles, changes, new approaches. England: VCH-Ellis Horwood Ltd. 141-154.
Augustin MA, Berry SK. Efficacy of the antioxidants BHA and BHT in palm olein during heating and frying. J Amer Oil Chem Soc. 1983;60:1520-23.
Farhoosh R, Kenari RE, Pooazrang R. Frying stability of canola oil blended with palm olein, olive and corn oils. J Amer Oil Chem Soc. 2009;86(1):71-76.
Lalas S, Gortzi O, Tsankanis J. Frying stability of Moringa stenopetala seed oil. Plant Foods Hum Nutr. 2006;61(2):99-108. Available:https://doi.org/10.1007/s11130-006-0022-8
Che Man YB, Tan CP. Effects of natural antioxidants on changes in refined, Bleached and deodorized palm olein during deep-fat frying of potato chips. J Amer Oil Chem Soc. 1999;76:331-39. Avialable:https://doi.org/10.1007/s11746-999-0240-y.
Reda SY. Comparative study of vegetable oils subjected to thermal stress. Masters dissertation. Universidade Estadual de Ponta Grossa; 2000.
Orthoefer ET, Cooper DS. Evaluation of used frying oil. In: Perkins EG, Erickson MD. Deep frying: Chemistry, Nutrition and practical applications. AOAC Press: Champaign.1996;285-296.
Shiota M, Konishi H, Tatsumi K. Oxidative stability of fish oil blended with butter. J Dairy Sci. 1999;82:1877–81.
Mamat H, Aini IN, Said M, Jamaludin R. Physicochemical characteristics of palm oil and sunflower oil blends fractionated at different temperatures. Food Chem. 2005; 91:731–36. Available:https://doi.org/10.1016/j.foodchem.2004.06.045
Baby Latha R, Nasirullah. Effect of heat on physico-chemical and thermo-oxidative stability of repeatedly heated rice bran oil (RBO). Int J Food Nutr Sci. 2016;5: 49-60. Available:https://www.ijfans.com/ijfansadmin/upload/ijfans_572329985c27f.pdf
Faridah DN, Lioe HN, Palupi NS, Kahfi J. Detection of FFA and peroxide values using FTIR for quality measurement in palm oil frying activities. J Oil Palm Res. 2015;27(2):156-67. Available:https://inis.iaea.org/search/search.aspx?orig_q=RN:48005572
Lalas S. Quality of frying oil. Advances in deep-fat frying of foods. New York, USA: CRC Press; 2009.
Park J, Kim J. Monitoring of used frying oils and frying times for frying chicken nuggets using POV and acid value. Korean J Food Sci Ani. 2016;5(36):612–16. Available:https://dx.doi.org/10.5851%2Fkosfa.2016.36.5.612.
Ahmad-Tarmizi AH, Siew WL. Quality assessment of palm products upon prolonged heat treatment. J Oleo Sci. 2008;57(12):639-48. Available:https://doi.org/10.5650/jos.57.639
Stevenson SG, Vaisey-Genser M, Eskin NAM. Quality control in the use of deep frying oils. J Amer Oil Chem Soc. 1984; 61:1102–08. Available:https://doi.org/10.1007/BF02636232
Codex alimentarius. Codex standard for named vegetable oils, Codex stan 210-1999. Amended in 2005 and 2011. Rome, Italy; 1999.
Chung J, Lee J, Choe E. Oxidative stability of soybean and sesame oil mixture during frying of flour dough. J Food Sci. 2004; 69:574-78.
Mazza G, Qi H. Effect of after-cooking darkening inhibitors on stability of frying Oil and quality of french fries. J Amer Oil Chem Soc. 1992;69:847–53.
Atinafu DG, Bedemo B. Estimation of total free fatty acid and cholesterol content in some commercial edible oils in Ethiopia, Bahir DAR. J Cereals Oilseeds. 2001;2:71-76.
Sulthana SN, Sen DP. Studies on deep Fat frying: Changes during heating of oil. J Food Sci Tech. 1979;16:208.
Serjouie A, Tan CP, Mirhosseini H, Che Man YB. Effect of vegetable-based oil blends on physicochemical properties of oils during deep-fat frying. Amer J Food Tech. 2010;5(5):310-23.
Che-Man YB, Wan-Hussin WR. Comparison of the frying performance of refined, bleached and deodorized palm olein and coconut oil. J Food Lipids. 1998; 5:197–210.
Ojeh O. Effects of refining on the physical and chemical properties of cashew kernel oil. J Fats Oils Tech. 1981;16(5):513–17. Available:https://doi.org/10.1111/j.1365-2621.1981.tb01844.x
Susheelamma NS, Asha MR, Ravi R, Kumar AKV. Comparative studies on physical properties of vegetable oils and their blends after frying. J Food Lipids. 2002;9:259–76. Available:https://doi.org/10.1111/j.1745-4522.2002.tb00225.x
Dana D, Saguy IS. Frying of nutritious foods: Obstacles and feasibility. Food Sci Tech Res. 2001;7(4):265-79.
Rossell JB. Measurement in rancidity. In: Allen JC, Hamilton RJ (eds) rancidity in food. Elsevier, London. 1989;22–51.
Sulieman MR, Makhzangy AE, Ramadan MF. Antiradical performance and physicochemical characteristics of vegetable oils upon frying of French fries: A preliminary comparative study. J Food Lipids. 2006;13(3):259-76.
Bou R, Navas JA, Tres A, Codony R, Guardiola F. Quality assessment of frying fats and fried snacks during continuous deep-fat frying at different large-scale producers. Food Control. 2012;27(1):254–67.
Tomkins PC, Perkins EG. The evaluation of frying oils with the P-anisidine value. J Amer Oil Chem Soc. 1999, 76 (8), 945-947. Available:https://doi.org/10.1007/s11746-999-0111-6.
Otunola AG, Adebayo GB, Olufemi OG. Evaluation of some physicochemical parameters of selected brands of vegetable oils sold in ilorin metropolis. Int J Phys Sci. 2009;4(5):327-29.
Marthias B. In: Oxidation in foods and beverages and antioxidant applications: Management in different industry sectors; 2010.
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