POTENTIOMETRIC STUDY USING CHEMICALLY-MODIFIED SILICA-GEL WITH PYRIDINIUM AS MEMBRANE FOR CIO4(-) IONS

Authors
LORENCETTI LL GUSHIKEM Y KUBOTA LT NETO GD FERNANDES JR
Citation
Ll. Lorencetti et al., POTENTIOMETRIC STUDY USING CHEMICALLY-MODIFIED SILICA-GEL WITH PYRIDINIUM AS MEMBRANE FOR CIO4(-) IONS, Mikrochimica acta, 117(3-4), 1995, pp. 239-244
Citations number
22
Categorie Soggetti
Chemistry Analytical
Journal title
Mikrochimica acta → ACNP
ISSN journal
00263672
Volume
117
Issue
3-4
Year of publication
1995
Pages
239 - 244
Database
ISI
SICI code
0026-3672(1995)117:3-4<239:PSUCSW>2.0.ZU;2-D
Abstract
A potentiometric sensor for the perchlorate anion was developed by mix ing chemically modified silicagel with pyridinium perchlorate, with an epoxy polymer and graphite. The electrode showed Nernstian response b etween 1.0 x 10(-2) and 1.0 x 10(-3) M 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-) i ons in the solutions, had only small interference in the electrode res ponse in the range mentioned.