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

被引：30

作者：

LORENCETTI, LL

GUSHIKEM, Y

KUBOTA, LT

NETO, GD

FERNANDES, JR

机构：

[1] UNICAMP,INST QUIM,CP 6154,BR-13081970 CAMPINAS,SP,BRAZIL

[2] FAC CIENCIAS BAURU,DEPT QUIM,BR-17033360 BAURU,SP,BRAZIL

来源：

MIKROCHIMICA ACTA | 1995年 / 117卷 / 3-4期

关键词：

MODIFIED SILICA GEL; PYRIDINIUM ION; PERCHLORATE ANALYSIS; PERCHLORATE SELECTIVE ELECTRODE;

D O I：

10.1007/BF01244893

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

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 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-) ions in the solutions, had only small interference in the electrode response in the range mentioned.

引用

页码：239 / 244

页数：6

共 22 条

[1] CHEMISORPTION OF SOME METAL(II) CHLORIDES ON SILICA-IMMOBILIZED ACETYLHYDRAZINE [J].