Lorencetti, Lilian L.Gushikem, YoshitakaKubota, Lauro T.de Oliveira Neto, GracilianoFernandes, João Roberto [UNESP]2014-05-272014-05-271995-09-01Mikrochimica Acta, v. 117, n. 3-4, p. 239-244, 1995.0026-36721436-5073http://hdl.handle.net/11449/64632A potentiometric sensor for the perchlorate anion was developed by mixing chemically modified silicagel with pyridinium perchlorate, with an epoxy polymer and graphite. The electrode showed Nernstian response between 1.0 × 10-2 and 1.0 × 10-3M perchlorate concentrations. The electrode showed high selectivity to this ion at solutions pH between 5.5 and 8.0. The presence of IO4 -, NO3 -,Br-, IO3 -, Cl- and SO4 2- ions in the solutions, had only small interference in the electrode response in the range mentioned. © 1995 Springer-Verlag.239-244engmodified silica gelperchlorate analysisperchlorate selective electrodepyridinium ionArtigo10.1007/BF01244893Acesso restrito2-s2.0-00030958638540599256820672