Artículos de revistas
Portable Platform For Rapid And Indirect Photometric Determination Of Water In Ethanol Fuel Samples
Registro en:
Analytical Methods. Royal Society Of Chemistry, v. 6, n. 23, p. 9497 - 9502, 2014.
17599660
10.1039/c4ay02255f
2-s2.0-84908583940
Autor
Giordano G.F.
Melo Ferreira D.C.
Ribeiro De Carvalho T.
Silveira Vieira L.C.
Helena De Oliveira Piazzetta M.
Lima R.S.
Gobbi A.L.
Institución
Resumen
We have developed a simple, fast, portable, inexpensive, and indirect method for the determination of water in ethanol fuels. The addition of an excess amount of water is the most simple and common method of adulterating these fuels. Such procedure can adversely affect the performance of the vehicle. Our system uses a laboratory-made photometry device to monitor the formation of complexes between ethanol and cerium(iv). These reactions produce deep orange-red solutions. The limit of detection and the analytical sensitivity were estimated to be 0.22% v/v (water in ethanol) and 0.11 (% v/v)-1, respectively. The developed platform was satisfactorily robust with respect to the changes in temperature and stability of the reagents during storage. The measurements were accurate at the 95% confidence level compared with data obtained by Karl Fischer titration. 6 23 9497 9502 Decicco, J.M., (2012) Clim. Change, 111, p. 627 Gnansounou, E., Dauriat, A., Villegas, J., Panichelli, L., (2009) Bioresour. Technol., 100, p. 4919 http://ethanolrfa.org/pages/World-Fuel-Ethanol-Production, accessed in April 2014Ribeiro, M.S., Angnes, L., Rocha, F.R.P., (2013) J. Braz. Chem. Soc., 24, p. 418 Carneiro, H.S.P., Medeiros, A.R.B., Oliveira, F.C.C., Aguiar, G.H.M., Rubim, J.C., Suarez, P.A.Z., (2008) Energy Fuels, 22, p. 2767 Freitas, L.C., Kaneko, S., (2011) Energy Economics, 33, p. 1146 Bueno, L., Paixão, T.R.L.C., (2011) Talanta, 87, p. 210 Figueiredo, M.K.-K., Costa-Felix, R.P.B., Maggi, L.E., Alvarenga, A.V., Romeiro, G.A., (2012) Fuel, 91, p. 209 Silva, A.C., Ponte, L.F.B.L., Pimentel, M.F., Pontes, M.J.C., (2012) Talanta, 93, p. 129 http://www.anp.gov.br/, accessed in August 2013http://nxt.anp.gov.br/nxt/gateway.dll/leg/resolucoes_anp, accessed in June 2014http://www.sindalcool.com.br/qualidade, accessed in June 2014Cho, S., Chung, H., Woo, Y., Kim, H., (2005) Bull. Korean Chem. Soc., 26, p. 115 Guchardi, R., Pasquini, C., (2001) Appl. Spectrosc., 55, p. 454 De Oliveira, W.A., Pasquini, C., (1984) Talanta, 31, p. 82 Pereira, P.F., Sousa, R.M.F., Munoz, R.A.A., Richter, E.M., (2013) Fuel, 103, p. 725 Omido, C.R., Oliveira, S.L., Shiraishi, R.S., Magalhães, K.F., Ferreira, V.S., De Carvalho, A.A., Kitano, C., De Paula, M.H., (2013) Sens. Actuators, B, 178, p. 581 Xiong, F.B., Sisler, D., (2010) Opt. Commun., 283, p. 1326 Pereira, A.C., Reis, B.F., Rocha, F.R.P., Talanta, 131, p. 21. , 2015 Matkovich, C.F., Christian, G.D., (1972) Anal. Chim. Acta, 60, p. 319 Kagevall, I., Aström, O., Cedergren, A., (1981) Anal. Chim. Acta, 132, p. 215 Pinyou, P., Youngvises, N., Jakmunee, J., (2011) Talanta, 84, p. 745 Reid, B.V.W., Truelove, R.K., (1952) Analyst, 77, p. 325 Briois, V., Lützenkirchen-Hecht, D., Villain, F., Fonda, E., Belin, S., Griesebock, B., Frahm, R., (2005) J. Phys. Chem. A, 109, p. 320 Suzuki, Y., Aruga, T., Kuwahara, H., Kitamura, M., Kuwabara, T., Kawakubo, S., Iwatsuki, M., (2004) Anal. Sci., 20, p. 975 Ellerbee, A.K., Phillips, S.T., Siegel, A.C., Mirica, K.A., Martinez, A.W., Striehl, P., Jain, N., Whitesides, G.M., (2009) Anal. Chem., 81, p. 8447 Harris, D.C., (2010) Quantitative Chemical Analysis, , 8th edn, W. H. Freeman and Company, New York Doyle, M.P.J., (1974) Chem. Educ., 51, p. 2 Young, L.B., Trahanovsky, W.S., (1969) J. Am. Chem. Soc., 91, p. 5060 Ribeiro, F.A.L., Ferreira, M.M.C., Morano, S.C., Silva, L.R., Schneider, R.P., (2008) Quim. Nova, 31, p. 164 Munoz, R.A.A., Richter, E.M., De Jesus, D.P., Do Lago, C.L., Angnes, L., (2004) J. Braz. Chem. Soc., 15, p. 523 Vieira, E.G., Soares, I.V., Dias Filho, N.L., Da Silva, N.C., Garcia, E.F., Bastos, A.C., Perujo, S.D., Faceto, L.F., (2013) J. Colloid Interface Sci., 391, p. 116