Artículos de revistas
Simple Methods Via Mid-ir Or 1h Nmr Spectroscopy For The Determination Of The Iodine Value Of Vegetable Oils
Registro en:
Journal Of The Brazilian Chemical Society. Sociedade Brasileira De Quimica, v. 26, n. 7, p. 1431 - 1437, 2015.
1035053
10.5935/0103-5053.20150111
2-s2.0-84936942232
Institución
Resumen
Two methods for determining the iodine value in vegetable oils are described. One employs mid-infrared (mid-IR) spectroscopy and the other uses hydrogen nuclear magnetic resonance (1H NMR). The determination of the iodine value is based on either the transmittance intensity of mid-IR signals or on the 1H NMR signal integration and multivariate calibration. Both of the methods showed adequate coefficients of determination (r2 = 0.9974 and 0.9978, respectively) when compared to Wijs method, which is recommended by the norm EN 14111. A statistical comparison between the results from the proposed methods and from Wijs method shows that both instrumental methods offer equivalent results and greater precisions compared to Wijs method. The regressions obtained from the constructed models were considered statistically significant and useful for making predictions. The proposed methods present several advantages compared to Wijs method because they significantly reduce analysis time, reagent consumption and waste generation. Furthermore, an analyst can choose between the mid-IR or 1H NMR to determine the iodine value. ©2015 Sociedade Brasileira de Química. 26 7 1431 1437 Knothe, G., Dunn, R.O., (2005) Industrial Uses of Vegetable Oils, p. 42. , Erhan, S. Z., ed. American Oil Chemists' Society: Champaign Tubino, M., Aricetti, J.A., (2013) J. Braz. Chem. Soc., 24, p. 1691 Tubino, M., Aricetti, J.A., (2013) Fuel, 103, p. 1158 Oromí-Farrús, M., Villorbina, G., Eras, J., Gatius, F., Torres, M., Canela, R., (2010) Fuel, 89, p. 3489 Kumar, R., Bansal, V., Patel, M.B., Sarpal, A.S., (2012) Energy Fuels, 26, p. 7005 Knothe, G., (2002) J. Am. Oil Chem. Soc., 79, p. 847 Morrison, H.J., Bosart, L.W., (1926) J. Am. Oil Chem. Soc., 3, p. 130 Stansbury, M.F., Hoffpauir, C.L., Hopper, T.H., (1953) J. Am. Oil Chem. Soc., 30, p. 120 Firestone, D., (2006) Physical and Chemical Characteristics of Oils, Fats, and Waxes, 2nd Ed., , American Oil Chemists' Society: Champaign Bailey, A.V., Harris, J.A., Skau, E.L., (1967) J. Am. Oil Chem. Soc., 44, p. 117 Stansbury, M.F., Hoffpauir, C.L., (1952) J. Am. Oil Chem. Soc., 29, p. 53 Baltes, J., (1964) Analysis and Characterization of Oils, Fats and Fat Products, p. 1. , Boekenoogen, H. A., ed. Interscience: London Hoekman, S.K., Broch, A., Robbins, C., Ceniceros, E., Nataranja, M., (2012) Renewable Sustainable Energy Rev., 16, p. 143 Frankel, E.N., (1984) J. Am. Oil Chem. Soc., 61, p. 1908 Frankel, E.N., (1980) Prog. Lipid Res., 19, p. 1 Farmer, E.H., Bloomfield, G.G., Sundralingam, S., Sutton, D.A., (1942) Trans. Faraday Soc., 38, p. 348 American Oil Chemists' Society, (1998) Iodine Values of Fats and Oils - Wijs Method, p. 1. , American Oils Chemists' Society: Champaign (2003) Fat and Oil Derivatives - Fatty Acid Methyl Esters (FAME) - Determination of Iodine Value, , EN 14111: European Committee for Standardization, Berlin Knothe, G., Kenar, J.A., (2004) Eur. J. Lipid Sci. Technol., 106, p. 88 Tubino, M., Aricetti, J.A., Maciel, J.A.S., Lopes, O., (2010) J. ASTM Int., 7 Tubino, M., Aricetti, J.A., (2012) J. Am. Oil Chem. Soc., 89, p. 2113 Silverstein, R.M., Webster, F.X., Kiemle, D.J., (2005) Spectrometric Identification of Organic Compounds, 7th Ed., , John Wiley: New York Gopinath, A., Puhan, S., Nagarajan, G., (2008) Renewable Energy, 34, p. 1806 Barros Neto, B., Scarminio, I.S., Bruns, R.E., (2010) Como Fazer Experimentos, 4th Ed., , Bookman: Porto Alegre Box, G.E.P., Draper, N.R., (1987) Empirical Model-Building and Response Surfaces, , Wiley: New York Eckschlager, K., (1969) Errors, Measurement and Results in Chemical Analysis, , Van Nostrand Reinhold: London Miyake, Y., Yokomizo, K., Matsuzaki, N., (1998) J. Am. Oil Chem. Soc., 75, p. 15 Triyasmono, L., Riyanto, S., Rohman, A., (2013) Int. Food Res. J., 20, p. 3259 Balabin, R.M., Safieva, R.Z., (2011) Energy Fuels, 25, p. 2373 Baptista, P., Felizardo, P., Menezes, J.C., Correia, M.J.N., (2008) Talanta, 77, p. 144 Cox, R., Lebrasseur, J., Michiels, E., Buijs, H., Li, H., Van De Voort, F.R., Ismail, A.A., Sedman, J., (2000) J. Am. Oil Chem. Soc., 77, p. 1229 Che Man, Y.B., Setiowaty, G., Van De Voort, F.R., (1999) J. Am. Oil Chem. Soc., 76, p. 693