A NOVEL SPECTROSCOPIC METHOD TO IMAGE H2O DISTRIBUTION IN ION-SELECTIVE MEMBRANES

被引：41

作者：

LI, XZ ^{[1
]}

PETROVIC, S ^{[1
]}

HARRISON, DJ ^{[1
]}

机构：

[1] UNIV ALBERTA,DEPT CHEM,EDMONTON T6G 2G2,ALBERTA,CANADA

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 1990年 / 1卷 / 1-6期

关键词：

D O I：

10.1016/0925-4005(90)80215-L

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A spatial imaging photometer has been developed to spectroscopically probe the internal concentration profile of H2O in polyvinylchloride-based K+-sensitive membranes. Addition to the membrane of the water-sensitive dye CoCl2 provides a means of spectroscopically observing the permeation of H2O. An initial rate of H2O uptake occurs with a diffusion coefficient of 3 × 10-7 cm2/s. A second stage then begins with light scattering centres being induced by H2O uptake, with an apparent diffusion coefficient of 3 × 10-8 cm2/s. © 1990.

引用

页码：275 / 280

页数：6

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