RESPONSES OF H+ SELECTIVE SOLVENT POLYMERIC MEMBRANE ELECTRODES FABRICATED FROM MODIFIED PVC MEMBRANES

被引:77
作者
LINDNER, E
COSOFRET, VV
KUSY, RP
BUCK, RP
ROSATZIN, T
SCHALLER, U
SIMON, W
JENEY, J
TOTH, K
PUNGOR, E
机构
[1] SWISS FED INST TECHNOL,DEPT ORGAN CHEM,CH-8092 ZURICH,SWITZERLAND
[2] TECH UNIV BUDAPEST,DEPT GEN & ANALYT CHEM,H-1111 BUDAPEST,HUNGARY
关键词
D O I
10.1016/0039-9140(93)80151-G
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
Potentiometric responses of a novel class of pH sensitive ionophores, namely several phenoxazine derivatives, were tested in different modified PVC matrices. The ionophores were compounded into liquid membranes as usual or were covalently coupled to the polymeric matrix. The general analytical performance of the membranes and other membrane characteristics (i.e., resistance and response time, as measures of membrane decomposition or structural changes) were followed in time. The transient responses of membranes with mobile ionophores in high molecular weight (HMW) and carboxylated PVC (PVC-COOH) were compared to those with immobilized ionophores. The response time of membranes with immobilized ionophores was found to be between those with mobile ionophores in HMW (fast response) and PVC-COOH (sluggish response). Accordingly, the rate of response was correlated primarily to the -COOH content of the membranes.
引用
收藏
页码:957 / 967
页数:11
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