Actas de congresos
Self-immobilization And/or Thermal Treatment For Preparing Silica-poly(methyloctylsiloxane) Stationary Phases
Registro en:
Journal Of Chromatography A. , v. 1030, n. 1-2, p. 217 - 223, 2004.
219673
10.1016/j.chroma.2003.08.107
2-s2.0-1242293001
Autor
Bottoli C.B.G.
Vigna C.R.M.
Fischer G.
Albert K.
Collins K.E.
Collins C.H.
Institución
Resumen
Batches of poly(methyloctylsiloxane) (PMOS)-loaded silica were prepared by the deposition of PMOS, into the pores of HPLC silica. Portions of PMOS-loaded silica were allowed to remain at ambient temperature, without further treatment for 2, 9, 20, 31, 51, 105 and 184 days after preparation to undergo self-immobilization (irreversible adsorption of a layer of polymer on silica at ambient temperature in the absence of initiators). Other portions were subjected to a thermal treatment (100°C for 4h) after 1, 2, 5, 7, 9, 15, 20, 25, 70, 111 and 184 days. Self-immobilized and thermally treated samples were characterized by % C, 29Si cross-polarization magic angle spinning (CP/MAS) NMR spectroscopy and reversed-phase column performance. The results show that thermal immobilization accelerates the distribution and rearrangement of the polymer on the silica surface. However, from the time that a monolayer has been formed by self-immobilization (∼100 days for PMOS on Kromasil silica), the thermal treatment does not alter this configuration and, thus, does not change the resulting chromatographic parameters. © 2003 Elsevier B.V. All rights reserved. 1030 1-2 217 223 Kurganov, A., Trüdinger, U., Isaeva, T., Unger, K.K., (1996) Chromatographia, 42, p. 217 Winkler, J., Marmé, S., (2000) J. Chromatogr. A, 888, p. 51 Stela, C., Rudaz, S., Veuthey, J.-L., Tchapla, A., (2001) Chromatographia, 53, p. 113 Trüdinger, U., Müller, G., Unger, K.K., (1990) J. Chromatogr., 535, p. 111 Nawrocki, J., Dunlap, C.J., Carr, P.W., Blackwell, J.A., (1994) Biotechnol. Prog., 10, p. 561 Hu, Y., Carr, P.W., (1998) Anal. Chem., 70, p. 1934 Henry, R.A., (2002) Am. Lab., 34 (22), p. 18 Ross, P., Knox, J.H., (1997) Adv. Chromatogr., 37, p. 121 Viron, C., André, P., Dreux, M., Lafosse, M., (1999) Chromatographia, 49, p. 137 Grün, M., Kurganov, A.A., Schacht, S., Schuth, F., Unger, K.K., (1996) J. Chromatogr. A, 740, p. 1 Mao, Y., Fung, B.M., (1997) J. Chromatogr. A, 790, p. 9 Majors, R., (2003) LC-GC, 21, p. 332 Hanai, T., (2000) Adv. Chromatogr., 40, p. 315 Majors, R., (2000) LC-GC, 18, p. 1214 Buchmeiser, M.R., (2001) J. Chromatogr. A, 918, p. 233 Henry, R.A., (2002) Am. Lab., 34 (12), p. 25 Kirkland, J.J., Truszkowski, F.A., Ricker, R.D., (2002) J. Chromatogr. A, 965, p. 25 Schomburg, G., (1991) Trends Anal. Chem., 10, p. 163 Petro, M., Berek, D., (1993) Chromatographia, 37, p. 549 Pozzebon, J.M., Queiroz, S.C.N., Melo, L.F.C., Kapor, M.A., Jardim, I.C.S.F., (2003) J. Chromatogr. A, 987, p. 381 Bottoli, C.B.G., Collins, K.E., Collins, C.H., (2003) J. Chromatogr. A, 987, p. 87 Ohmacht, R., Kele, M., Matus, Z., (1989) Chromatographia, 28, p. 19 Collins, K.E., Sá, A.L.A., Bottoli, C.B.G., Collins, C.H., (2001) Chromatographia, 53, p. 661 Bottoli, C.B.G., Chaudhry, Z.F., Fonseca, D.A., Collins, K.E., Collins, C.H., (2002) J. Chromatogr. A, 948, p. 121 Tonhi, E., Bachmann, S., Albert, K., Jardim, I.C.S.F., Collins, K.E., Collins, C.H., (2002) J. Chromatogr. A, 948, p. 97 Collins, K.E., Franchon, A.C., Jardim, I.C.S.F., Radovanovic, E., Gonçalves, M.C., (2000) LC-GC, 18, p. 106 Bottoli, C.B.G., (2002), Ph.D. Thesis, Universidade Estadual de Campinas, CampinasAlbert, K., Bayer, E., (1991) J. Chromatogr., 544, p. 345 Albert, K., Brindle, R., Schmid, J., Buszewski, B., Bayer, E., (1994) Chromatographia, 38, p. 283 Tonhi, E., Bachmann, S., Albert, K., Jardim, I.C.S., Collins, K.E., Collins, C.H., (2002) J. Chromatogr. A, 948, p. 97 Hetem, M.J.J., De Haan, J.W., Claessens, H.A., Cramers, C.A., Deege, A., Schomburg, G., (1991) J. Chromatogr., 540, p. 53 Adamson, A.W., Gast, A.P., (1997) Physical Chemistry of Surfaces, sixth ed., , Wiley, New York Fleer, G.J., Lyklema, J., (1993) Adsorption from Solution at the Solid/Liquid Interface, , G.D. Parfitt, C.H. Rochester (Eds.), Academic Press, New York Collins, K.E., Granja, M.L.M.M., Pereira, R.G., Anazawa, T.A., Jardim, I.C.S.F., (1997) Chromatographia, 45, p. 99