Optimizing the simultaneous effect of change in bleaching parameters on the quality of sunflower oil using response surface methodology (RSM)

Document Type : Research Article

Authors

1 Ph.D Student, Department of Food Science and Technology, Science and Research Branch, Islamic Azad University, Tehran, Iran

2 Professor, Department of Food Science and Technology, Science and Research Branch, Islamic Azad University, Tehran, Iran

3 Food Industries and Agriculture Research Center, Standard Research Institute of Iran

4 Professor, Research Center for Medicinal Plants, Shahr-e-Qods Branch, Islamic Azad University, Tehan, Iran

Abstract

In edible oil refining, the bleaching treatment is a essential step. The adsorbents used for bleaching can remove pigments and other impurities, such as soap, trace metals, phospholipids, and oxidation products. The removal of these impurities improves the sensory quality and the oxidative stability of the deodorized oil.
Considering the importance of bleaching in edible oil purification, in this research sunflower oil was selected and the effect of bleaching on chemical properties in order to optimization the process was investigated. For this matter, the effect of time (15, 25, 35, 45, and 55 min), temperature (80, 90, 100, 110, and 120˚C), and concentration of bleaching clay (0.4, 0.6, 0.8, 1, and 1.2%) using Response Surface Methodology (RSM) in 5 levels by CCD method have been studied with the aim of reduction in bleaching clay consumption. Chemical tests were carotenoid, sterol, tocopherol, heavy metals. Results indicated that the best situation in corn oil was time 39.18min, temperature 103.85˚C, and concentration of bleaching clay 94% that meet 57% of our desirable demands. Practical results showed no significant difference between software suggestions and practical data.

Graphical Abstract

Optimizing the simultaneous effect of change in bleaching parameters on the quality of sunflower oil using response surface methodology (RSM)

Highlights

  • Response surface methodology (RSM) is a useful model to study the effect of different factors on the response factor by simultaneously changing them.
  • The main objective of the response surface methodology is to identify the optimal conditions for the process.
  • Optimization of bleaching conditions can be effective to increase oil quality.
  • The use of practical statistical design techniques in the absorption process can lead to cost reduction as improving efficiency.

Keywords

Main Subjects


[1] Gunstone, F.D. (2005). Vegetable oils. in: Shahidi, F. (Eds). Bailey’s industrial oil and fat products. 6th ed., Wiley-interscience publication.
[2] Grompone, M.A. (2005). Sunflower oil. in: Shahidi, F. (Eds). Bailey’s industrial oil and fat products. 6th ed. Wiley-interscience publication.
[3] Ahmadi, F., Kadivar, M & Shahedi, M. (2007). Antioxidant activity of Kelussia odoratissima Moza. in model and food systems. Food Chem., 105, 57-64.
[4] Thomas, M.J. (2000). The role of free radicals antioxidants. Am J Clin Nutr., 16, 716 - 724.
[5] Roy, P., Amdekar, S., Kumar, A. and Singh, V. (2011). Preliminary study of the antioxidant properties of flowers and roots of Pyrostegia venusta (Ker Gawl) Miers. BMC Complement Altern. Med., 11, 69.
[6] Seng, C. E., Lee, C. G. and Liew, K. Y. (2001). Adsorption of chromium (VI) and nickel (II) ions on acid- and heatactivated deoiled spent bleaching clay. J. AOCS., 78(8), 831-835.
[7] Skevin, D., Domijan, T., Kraljic, K., Gajdoš, J., Neđeral, S. and Obranovi, M. (2012). Optimization of bleaching parameters for soybean oil. Food Technol Biotech., 50(2), 199–207.
[8] Foletto, E.L., Alves, C.C.A., Sganzerla, L. R. & Porto, L. M. (2002). Regeneration and utilization of spent bleaching clay. Lat Am Appl Res., 32(2), 205-208.
[9] Nwabanne, J.T. and Ekwu, F.C. (2013). Experimental Design Methodology Applied to Bleaching of Palm Oil Using Local Clay. Int J Appl Sci Technol., 3, 69-70.
[10] National Standard of Iran. (2015). Animal and vegetable fats and fats - Gas chromatography of fatty acid methyl esters - Part 2: Preparation of fatty acid methyl esters. No. 13126-2 and 13126-4. [In Persian]
 [11] Anon. (1999). Animal and vegetable fats and oils – Determination of Individual and Total Sterols Contents – Gas Chromatographic Method, ISO Method 12228:1999, Geneva, Switzerland.
[12] Anon. (2006). Animal and vegetable fats and oils – Determination of Tocopherols and Tocotrienols Content by High-Performance Chromatography, ISO Method 9936:2006, Geneva, Switzerland.
[13] AOCS. (2007). Official methods and recommended practices of the American oil chemist's Society.
[14] AOCS. (1998). Official Methods and Recommended Practices of the American Oil Chemists’ Society. 4th edition, Champaign, IL: AOCS Press.
[15] Codex Stan 210. (1999). Codex Alimentarius International Food Standards, www.codexalimentarius.org.
[16] Ortega-Garc´ıa, J., G´amez-Meza, N., Noriega-Rodriguez, J. A., Dennis-Qui˜nonez, O., Garc´ıa Galindo, H. S., Angulo-Guerrero, J.O.  and Medina-Ju´arez, L.A. (2006). Refining of high oleic safflower oil: Effect on the sterols and tocopherols content. Eur Food Res Technol., 223, 775–779
[17] O’Brien, D.R., Jones, L.A., King, C.C., Wakelyn, P.J. and Wan, P.J. (2005) Bailey’s Industrial Oil and Fat Products, Sixth Edition, Six Volume Set. Edited by Fereidoon Shahidi.
[18] Wu, Y., Zhou, R., Wang, Z., Wang, B., Yang, Y. and Ju, X. (2019). The effect of refining process on the physicochemical properties and micronutrients of rapeseed oils. PLoS One., 14(3), 1-16.ID
[19] Ergönül, P.G. and Köseoğlu, O. (2014). Changes in α-, β-, γ- and δ-tocopherol contents of mostly consumed vegetable oils during refining process. J Food., 12(2), 199-202.
[20] Ayerdi, A. and Rhazi, L. (2016). Effects of refining process on sunflower oil minor components: A review. J Food Sci Technol., 52(7), 4613-4618.
[21] Mukasa-Tebandeke, I.Z., Mukasa Ssebuwufu, P.J.,Nyanzi, S.I., Schumann, A., Nyakairu, G.W. and Lugolobi, F. (2014). Using trace metals, peroxide, acid and iodine values to characterize oils bleached using clays from central and Eastern Uganda. Am J Analyt Chem ., 5, 1302-1312.
[22] Sanei, M., Goli, A.M., Keramat, J., Shirvani, M. and Vatankhah, H. (2014). Optimization of soybean oil bleaching process by response surface methodology. Third International Conference on New Approaches to Energy Conservation. [In Persian]