Determination Of Anions, Cations, And Sugars In Coconut Water By Capillary Electrophoresis

Abstract

This work presents the determination of several analytes in coconut water by using capillary electrophoresis with contactless conductivity detection (CCD). It was analyzed 5 different samples: two unprocessed (natural) coconut water and three processed (commercial) ones. The samples were injected without pretreatment and only a simple dilution was necessary. The technique was applied to quantify 12 analytes: chloride, sulfate, phosphate, malate, ascorbate, potassium, sodium, calcium, magnesium, fructose, glucose, and sucrose with limit of detection (LOD) of 0.09, 0.12, 0.50, 0.97, 1.2, 0.05, 0.17, 0.12, 0.08, 5.4, 7.4, and 8.9 mg L-1, respectively. These analysis were done utilizing four different running buffers. ©2005 Sociedade Brasileira de Química.166 A11341139Banzon, J.A., (1977) Philippine J. Coconut Studies, 2, p. 13Seow, C.C., Gwee, C.N., (1997) Int. J. Food Sci. Tecnol., 32, p. 189Aragão, W.M., A Importância Do Coqueiro-Anão Verde, , http://www.embrapa.brSantoso, U., Kubo, K., Ota, T., Tadokoro, T., Mackawa, A., (1996) Food Chem., 7, p. 299Aleixo, P.C., Nóbrega, J.A., Santos, D., Muller, P.C.S., (2000) Quim. Nova, 23, p. 310Dey, G., Sachan, A., Ghosh, S., Mitra, A., (2003) Ind. Crops Prod., 18, p. 171Leong, L.P., Shui, G., (2002) Food Chem., 76, p. 69Wagner, K.-H., Derkits, S., Herr, M., Schuh, H., Elmadfa, I., (2002) Food Chem., 78, p. 375Andrade, E.R., Amorim, C.A., Matos, M.H.T., Rodrigues, A.P.R., Silva, J.R.V., Dode, M.A.N., Figueiredo, J.R., (2002) Small Ruminant Res., 43, p. 235Jackson, J.C., Gordon, A., Wizzard, G., McCook, K., Rolle, R., (2004) J. Sci. Food Agric., 84, p. 1049Petroianu, G.A., Kosanovic, M., Shehatta, I.S., Mahgoub, B., Saleh, A., Maleck, W.H., (2004) J. Trace Element. Exp. Med., 17, p. 273Khan, M.N., Muti-Ur-Rehman, Khan, K.W., (2003) Pakistan J. Botany, 35, p. 925Brito, N.M., Navickiene, S., Polese, L., Jardim, E.F.G., Abakerli, R.B., Ribeiro, M.L., (2002) J. Chromatogr. A, 957, p. 201Ge, L.Y., Yong, J.W.H., Tan, S.N., Yang, X.H., Ong, E.S., (2004) J. Chromatogr. A, 1048, p. 119Da Silva, J.A.F., Guzman, N., Do Lago, C.L., (2002) J. Chromatogr. A, 942, p. 249Da Silva, J.A.F., Do Lago, C.L., (1998) Anal. Chem., 70, p. 4339Rocha, F.R., Da Silva, J.A.F., Do Lago, C.L., Fornaro, A., Gutz, I.G.R., (2003) Atmos. Environ., 37, p. 105Da Silva, J.A.F., Ricelli, N.L., Carvalho, A.Z., Do Lago, C.L., (2003) J. Braz. Chem. Soc., 14, p. 265Munoz, R.A.A., Richter, E.M., De Jesus, D.P., Do Lago, C.L., Angnes, L., (2004) J. Braz. Chem. Soc., 15, p. 523Carvalho, A.Z., Da Silva, J.A.F., Do Lago, C.L., (2003) Electrophoresis, 24, p. 213