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Using Trace Metals, Peroxide, Acid and Iodine Values to Characterize Oils Bleached Using Clays from Central and Eastern Uganda

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Bleaching of edible oils is known to alter the composition of oils as it removes impurities and certain food nutrients. The characteristics of bleached oil are strongly related to type bleaching medium, temperature at which bleaching is done and other factors. In this study, we compare peroxide, free fatty acid, acid and iodine values, copper and iron content of bleached and crude oils to establish the characteristics of edible oils bleached using smectite and kaolinite-rich clays. Oil industries spend large sums of money purchasing bleaching earths yet no country lacks natural clays which can be developed to bleach oils. In Uganda alone more than US$ 700,000 is spent every month yet many clay deposits are unexploited. In this study, we have documented trace metal composition, peroxide values, acid values, iodine values and free fatty acid content of bleached and unbleached cotton-seed and sunflower seed oils. The bleached oils were found to be fit for human use. Clays are either kaolinites or smectites, but the clays used to bleach edible oils are montmorillonites or bentonites. The decrease in content of iron in the bleached oils was highest for all oils bleached. The content of copper showed the smallest change. The content of copper in cotton oils decreased from 0.5 ppm to 0.15 ppm using Kajansi clay leached in 20% acid yet when Chelel clay leached under similar conditions was used decrease was from 0.5 to 0.1 ppm. The content of iron in sunflower oils bleached using Kajansi clay leached in 20% acid decreased from 1.6 to 0.2 ppm yet that bleached with Chelel clay under similar conditions decreased to 0.1 ppm. The acid values showed that the acidity in sunflower oils is largely due to oleic acid as the average value for acids is in the range close to oleic acid, cotton-seed oil corresponded to linoleic acid. The levels of free fatty acid were found to lie in range from 3.8 - 3.2 for all clays used showing no significant rise. The peroxide values of bleached oils lay between 1.2 and 0.8.
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Mukasa-Tebandeke, I. , Ssebuwufu, P. , Nyanzi, S. , Schumann, A. , Nyakairu, G. and Lugolobi, F. (2014) Using Trace Metals, Peroxide, Acid and Iodine Values to Characterize Oils Bleached Using Clays from Central and Eastern Uganda. American Journal of Analytical Chemistry, 5, 1302-1312. doi: 10.4236/ajac.2014.517136. 
 

[1] (1997) McGraw-Hill Dictionary of Earth Sciences. McGraw-Hill, New York.
[2] Siddiqui, M.K.H. (1968) Bleaching Earth. Pergamon Press, London.
[3] Christidis, G.E. and Kosiari, S. (2003) Decolorization of Vegetable Oils: A Study of the Mechanism of Adsorption of β-Carotene by an Acid-Activated Bentonite from Cyprus. Clays and Clay Minerals, 51, 327-333.
http://dx.doi.org/10.1346/CCMN.2003.0510309
[4] Boki, K.S. and Ohno, S. (1989) Effects of Filtering through Bleaching Media on Decrease of Peroxide Value of Autoxidised Soybean Oil. Journal of Food Science, 54, 1601-1603.
http://dx.doi.org/10.1111/j.1365-2621.1989.tb05169.x
[5] Bailey, S.W. and Brindley, G.W. (1979) Structure of Basic Clay Mineralogy Groups. Clay Mineral, 27, 238-239.
http://dx.doi.org/10.1346/CCMN.1979.0270310
[6] Nutting, P. (1935) The Bleaching Earths. Bulletin of the American Association of Petroleum Geologists, 19, 1045.
[7] Patterson, H.B.W. (1992) Bleaching and Purifying Fats and Oils: Theory and Practice. American Oil Chemists’ Society Press, Urbana.
[8] Srasra, E., Bergaya, F., van Damme, H. and Ariquib, H.K. (1989) Surface Properties of Activated Bentonite Decolorization of Rape Seed Oils. Applied Clay Science, 4, 411-421.
http://dx.doi.org/10.1016/0169-1317(89)90019-7
[9] Taylor, D.R. (1984) The Adsorption of Fatty Acids from Vegetable Oils with Zeolites and Bleaching Clay/Zeolite Blends. Journal of the American Oil Chemists’ Society, 61, 8.
http://dx.doi.org/10.1007/BF02542246
[10] Wiederman, C. (1981) Effects of Filtering through Bleaching Media on Decrease of Peroxide Value of Vegetable Oils. Journal of American Oil Chemical Society, 59, 159-166.
[11] Proctor, A. and Snyder, H.E. (1987) Adsorption Efficiency of Selected Adsorbents in Purification of Phospholipids and Lutein. Journal of the American Oil Chemists’ Society, 64, 1163-1166.
http://dx.doi.org/10.1007/BF02612994
[12] Boukerroui, A. (2009) Regeneration of a Spent Bleaching Earth and Its Reuse in the Refining of an Edible Oil. American Institute of Chemical Engineers AIChE Journal, 37, 679-686.
[13] Volzone, C., Foletto, F.L. and Porto, L.M. (2003) Performance of an Argentinian Acid-Activated Bentonite in the Bleaching of Soybean Oil. Brazilian Journal of Chemical Engineering, 20, 123-126.
[14] Richardson, L.L. (1978) Use of Bleaching Clays in Processing Edible Oils. Journal of the American Oil Chemists’ Society, 55, 1558-1560.
http://dx.doi.org/10.1007/BF02682647
[15] Nutting, P.G. (1933) Bleaching Clay Circular 3. US Department of Interior.
[16] Dandy, A.J. (1965) Bleaching Vegetable Oils with Kajansi, Koki and Mutaka Clays. Proceedings of the East African Academy, 3, 2-8.
[17] Mukasa-Tebandeke, I.Z., Ssebuwufu, P.J.M., Lugolobi, F., Nyanzi, S., Schumann, A. and Kirsch, N. (2003) The Bleaching Clays of Central and Eastern Uganda: The Relation between Mineralogy and Chemical Composition to Bleaching Properties. International Journal of Environmental Issues, 1, 20-29.
[18] Gadzekpo, V.P.Y. and Mensah, S.G. (1991) Bleaching Palm Oil and Shea Butter Oils Using Acid-Leached Ghanaian Clays. Ghana Journal of Chemistry and Industry, 1, 197-201.
[19] Sabah, E.C. and Sabri, M. (2005) Sepiolite: An Effective Bleaching Adsorbent for the Physical Refining of Degummed Rapeseed Oil. Journal of the American Oil Chemists’ Society, 82, 911-916.
http://dx.doi.org/10.1007/s11746-005-1164-4
[20] Toro-Vazquez, J. (1991) Interactions among Oil Components during Adsorption: Effects on Carotenoids and Peroxides. Journal of Food Science, 56, 1648-1650.
http://dx.doi.org/10.1111/j.1365-2621.1991.tb08662.x
[21] Allen, B.L., Siltonen, P.H. and Thompson Jr., H.C. (1988) Determination of Copper, Lead, Nickel in Edible Oils by Plasma and Furnace Atomic Absorption Spectroscopy. Journal of the American Oil Chemists’ Society, 75, 477-481.
http://dx.doi.org/10.1007/s11746-998-0250-1
[22] Chiew, W.P.Y., Ah Ngan, M. and Cheng, H.C. (2007) The Effect of Physical Refining on Palm Vitamin E (Tocopherol, Tocotrienol and Tocomonoenol). American Journal of Applied Sciences, 4, 374-377.
http://dx.doi.org/10.3844/ajassp.2007.374.377
[23] De Greyt, W.F., Kellens, M.J. and Huyghebaert, A.D. (1999) Effect of Physical Refining on Selected Minor Components in Vegetable Oils. Lipid, 101, 428-432.
http://dx.doi.org/10.1002/(SICI)1521-4133(199911)101:11<428::AID-LIPI428>3.0.CO;2-T
[24] Leonardis, D.A., Macciola, V. and Felice, D.M. (2000) Copper and Iron Determination in Edible Vegetable Oils by Graphite Furnace Atomic Absorption Spectrosopy. International Journal of Food Science & Technology, 350, 371-375.
http://dx.doi.org/10.1046/j.1365-2621.2000.00389.x
[25] Mbah, B.J.M., Kamga, J.F., Nguetnkam, J. and Fanni, J. (2005) Adsorption of Pigments and Free Fatty Acids from Shea Butter on Activated Cameroonian Clays. European Journal of Lipid Science and Technology, 107, 307-394.
http://dx.doi.org/10.1002/ejlt.200501149
[26] Ng, M.H., Choo, Y.M., Ma, A.N., Chuah, C.H. and Hashim, M.A. (2004) Separation of Vitamin E (Tocopherol, Tocotrienol and Tocomonoenol) in Palm Oil. Lipids, 39, 1031-1035.
http://dx.doi.org/10.1007/s11745-004-1327-y
[27] Rossi, M., Gianazza, M., Alamprese, C. and Stanga, F. (2001) The Effect of Bleaching and Physical Refining on Color and Minor Components of Palm Oil. Journal of the American Chemical Society, 78, 1051-1055.
[28] Zchau, W. (1981) Proc. Palm Oil Product Technology in the Eighties, Kuala Lumpur.
[29] Bheemreddy, M.R., Pannu, K.S. and Reynolds, A.E. (2002) Filtration and Filter System for Treated Frying Oil. Journal of Food Process Engineering, 25, 23-40.
http://dx.doi.org/10.1111/j.1745-4530.2002.tb00554.x
[30] Shahidi, F.W. (1997) Change in Edible Fats and Oils during Processing. Journal of Food Lipids, 4, 199-231.
http://dx.doi.org/10.1111/j.1745-4522.1997.tb00093.x
[31] Zhang, A.P. (1992) Evaluation of Frying Oil Filtration Systems. Journal of Food Science, 57, 651-654.
http://dx.doi.org/10.1111/j.1365-2621.1992.tb08062.x
[32] Goh, S.H., Tong, S.L. and Gee, P.T. (1984) Total Phospholipids in Crude Palm Oil: Quantitative Analysis and Correlations with Oil Quality Parameters. Journal of the American Oil Chemists’ Society, 61, 597-600.
[33] Goh, S.H., Hew, N.F., Yadav, M. and Norhanom, A.W. (1994) Inhibition of Tumour Promotion by Various Palm-Oil Tocotrienols. International Journal of Cancer, 57, 529-531.
http://dx.doi.org/10.1002/ijc.2910570415
[34] Packer, L. (1991) Protective Role of Vitamin E in Biological Systems. American Journal of Clinical Nutrition, 53, 1050S-1051S.
[35] Matsumoto, A., Takahashi, S., Nakano, K. and Kijima, S. (1995) Identification of a New Vitamin E in a Plant Oil. Journal of Japan Oil Chemists’ Society, 44, 593-597.
http://dx.doi.org/10.5650/jos1956.44.593
[36] Wang, W., Chen, H. and Wang, A. (2007) Adsorption Characterization of Cd2+ from Aqueous Solution onto Activated Polygorskite. Separation and Purification Technology, 55, 157-164.
[37] Hedtmann, U.K., Hobert, K., Frelek, J., Vlahov, I. and Welzel, P. (1991) A Facile Route to 20-Hydroxyecdysone and Side Chain Homologues from Poststeron. Tetrahedron, 47, 3753-3772.
http://dx.doi.org/10.1016/S0040-4020(01)80901-7
[38] Khor, H.T.C. (1997) Effect of Squalene, Tocotrienols and Tocopherol Supplementations in the Diet on Serum and Liver Lipids in the Hamster. Nutrition Research, 17, 475-483.
http://dx.doi.org/10.1016/S0271-5317(97)00006-7
[39] Khor, H.T.C. (1996) Effect of Dietary Supplementation of Tocotrienols and Tocopherols on Serum Lipids in the Hamster. Nutrition Research, 16, 1393-1401.
http://dx.doi.org/10.1016/0271-5317(96)00146-7
[40] Sarier, N. and Guler, E. (1988) β-Carotene Adsorption on Acid-Activated Montmorillonite. Journal of the American Oil Chemists Society, 65, 776-779.
http://dx.doi.org/10.1007/BF02542530
[41] Chen, K.D. (1994) Endogenous Skeletal Muscle Antioxidants. Critical Reviews in Food Science and Nutrition, 34, 403-426.
http://dx.doi.org/10.1080/10408399409527669
[42] Mortensen, A.L.H.S. (2000) Kinetics and Mechanism of the Primary Steps of Degradation of Carotenoids by Acid in Homogeneous Solution. Journal of Agricultural and Food Chemistry, 48, 279-286.
http://dx.doi.org/10.1021/jf9904620
[43] Siew-Ling, H., Kwan-Kit, W. and Ching-Lee, W. (2010) Stability Studies of Fucoxanthin from Sargassum Binderi. Australian Journal of Basic and Applied Sciences, 4, 4580-4584.
[44] Kheok, S.C. and Lim, E.E. (1982) Mechanism of Palm Oil Bleaching by Montmorillonite Clay Activated at Various Acid Concentrations. Journal of the American Oil Chemists Society, 59, 129-131.
http://dx.doi.org/10.1007/BF02662259
[45] Kaufmann, H.P. (1967) Neuzeitliche Technologie der Fette and fettprodukte CXVI: Die Raffination der Fette. Fette Selfen Anstrichm, 64, 356-370.
[46] Norris, F.A. (1964) Bailey’s Industrial Oil and Fats Products. 3rd Edition, Wiley-Interscience, New York.
[47] Norris, F.A. (1982) Bailey’s Industrial Oil and Fats Products. 4th Edition, Wiley-Interscience, New York.
[48] Fahn, R. (1976) Bleaching Earths-Preparation, Properties, Practical Applications. Brussels. Chapter 1 International Symposium, Brussels, 28-29.
[49] Beneke, K. and Lagaly, G. (2002) ECGA (European Clay Group Association) Newsletter No. 5, 57-78.
[50] Didi, M.A., Makhoukhi, B., Azzouz, A. and Villemin, D. (2009) Colza Oil Bleaching through Optimized Acid Activation of Bentonite: A Comparative Study. Applied Clay Science, 42, 336-344.
http://dx.doi.org/10.1016/j.clay.2008.03.014
[51] AOCS (1997) Official and Tentative Methods for the American Oil Chemists’ Society. 7th Edition, American Oil Chemists’ Society, Champaign, 456.
[52] Pockington, W.D. (1990) Determination of the Iodine Value of Oils and Fats. Results of a Collaborative Study. Pure and Applied Chemistry, 62, 2339-2343.
[53] Mag, T.K. (1990) Bleaching-Theory and Practice. In: Erickson, D.R., Ed., Proceedings of the Edible Fats and Oils Processing World Conference, American Oil Chemists’ Society, Champaign, 107-116.
[54] Boyd, S.A., Shaobai, S., Lee, J.F. and Mortland, M.M. (1988) Pentachlorophenol Sorption by Organo-Clays. Clays & Clay Minerals, 36, 125-130.
http://dx.doi.org/10.1346/CCMN.1988.0360204
[55] Wei, P.C., Ngan, M.A. and Hock, C.C. (2004) Degumming and Bleaching: Effect on Selected Constituents of Palm Oil. Journal of Oil Palm Research, 16, 57-63.
[56] Bhattacharyya, K.G. (2006) Kinetics of Adsorption of Metal Ions on Inorganic Materials. Journal of Colloid and Interface Science, 295, 21.
[57] Gupta, S.S. and Bhattacharyya, K.G. (2006) Adsorption of Nickel(II) on Clays. Journal of Colloid and Interface Science, 295, 21-32.
http://dx.doi.org/10.1016/j.jcis.2005.07.073
[58] Sabah, E.M.M. (2009) Removal of Phosphorus from Vegetable Oil by Acid-Activated Sepiolite. Journal of Food Engineering, 91, 423-427.
http://dx.doi.org/10.1016/j.jfoodeng.2008.09.020
[59] Falaras, P.K., Lezou, F. and Seiragakis, G. (1999) Cottonseed Oil Bleaching by Acid-Activated Montmorillonite. Clay Minerals, 34, 221-232.
http://dx.doi.org/10.1180/000985599546181
[60] Adel, Y.G. (2005) Reuse of Discarded Deactivated Bleaching Earths in the Bleaching of Oils. Grasas y Aceites, 56, 34-45.
[61] Hendrickse, P.W., Silkerveer, F.J., Folkerona, A. and Dieffenbacher, A. (1991) Determination of Copper, Iron, Nickel in Oils and Fats. Pure and Applied Chemistry, 63, 1183-1190.
[62] Morgan, D.A., Shaw, D.B., Sidebottom, M.J., Soon, T.C. and Taylor, R.S. (1985) The Function of Bleaching Earths in Processing of Palm, Palm Kernal and Coconut Oils. Journal of the American Oil Chemists’ Society, 64, 292-299.
http://dx.doi.org/10.1007/BF02541394
[63] Hoffmann, G. (1989) The Chemistry and Technique of Edible Oils and Fats and Their High Fat Products. Academic Press, London.
[64] Topallar, H. (1998) Adsorption Isotherms of the Bleaching of Sunfower-Seed Oil. Turkish Journal of Chemistry, 22, 143-148.
[65] Firestone, D. (1993) Standard Methods for the Sampling and Analysis of Commercial Fats and Oils. Industrial and Engineering Chemistry, 23, 234-235.
[66] Firestone, D.H.W. (1993) IUPAC Gas Chromatographic Method for Determination of Fatty Acid Composition: Collaborative Study. Proceedings of the National Academy of Sciences of the United States of America, 90, 7498-7502.
[67] Morrison, W. (1975) Effects of Refining and Bleaching on Oxidative Stability of Sunflower Seed Oil. Journal of the American Oil Chemists Society, 52, 522-525.
http://dx.doi.org/10.1007/BF02640746                  eww141226lx
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