01221naa a2200193 a 450000100080000000500110000800800410001910000280006024501060008826000090019452006450020365000160084865000150086465000220087965000140090170000190091570000240093477300690095810150732018-11-14       2002    bl uuuu     u00u1 u    #d1 aQUEIROZ, S. C. do N. de  aPoly(methyloctadecylsiloxane) immobilized on silica by y radiation for use in solid-phase extraction.  c2002  aThis work presents a fast, easy and effective procedure to obtain silica-based C[18] type sorbents for use in solid-phase extraction (SPE). The solid-phase was made by depositing a polymer, poly(methyloctadecylsiloxane) (PMODS), on the silica support followed by immobilization using ? irradiation. The method presents an application of green chemistry in the analytical laboratory, since there are no toxic residues after the synthesis. Water samples spiked with a mixture of pesticides (benomyl, tebuthiuron, diuron, simazine, atrazine and ametryn) were extracted in the off-line mode in order to evaluate the performance of this sorbent.  aAgrotóxico  aAmostragem  aAnálise química  aRaio Gama1 aMELO, L. F. C.1 aJARDIM, I. C. S. F.  tJournal of Chromatography A, Amsterdamgv. 948, p.171-176, 2002.