Potentiometric study using chemically modified silica gel with pyridinium as membrane for ClO4 - ions
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Data
1995-09-01
Autores
Lorencetti, Lilian L.
Gushikem, Yoshitaka
Kubota, Lauro T.
de Oliveira Neto, Graciliano
Fernandes, João Roberto [UNESP]
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Resumo
A 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.
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modified silica gel, perchlorate analysis, perchlorate selective electrode, pyridinium ion
Como citar
Mikrochimica Acta, v. 117, n. 3-4, p. 239-244, 1995.