FIBEROPTIC REFLECTOMETRIC STUDY ON ACID-BASE EQUILIBRIA OF IMMOBILIZED INDICATORS - EFFECT OF THE NATURE OF IMMOBILIZING AGENTS

被引：10

作者：

ANDRES, RT

SEVILLA, F

机构：

[1] Research Centre for the Natural Sciences, University of Santo Tomas, Espana, Manila

来源：

ANALYTICA CHIMICA ACTA | 1991年 / 251卷 / 1-2期

关键词：

REFLECTANCE SPECTROMETRY; ACID BASE EQUILIBRIA; FIBER OPTICS; IMMOBILIZED ACID-BASE INDICATORS; INDICATORS;

D O I：

10.1016/0003-2670(91)87130-Y

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The equilibrium properties of three acid-base indicators immobilized on a non-ionic polymer and on an ion-exchange resin were investigated using fibre-optic reflectometry. Kubelka-Munk functions derived from the reflectance data were used to determine the acidity constants. The results indicate that the ionization of indicators immobilized on a non-polar surface was less extensive than when it was immobilized on an ionic solid resin. The "solvent" model for adsorption on a polymer surface was supported by these observations.

引用

页码：165 / 168

页数：4

共 10 条

[1] SPECTROPHOTOMETRIC INVESTIGATIONS ON IMMOBILIZED ACID-BASE INDICATORS [J].