EFFECTS OF ANIONIC SITES ON THE SELECTIVITY OF SODIUM-SENSITIVE CHEMFETS

Authors
BRUNINK JAJ BOMER JG ENGBERSEN JFJ VERBOOM W REINHOUDT DN
Citation
Jaj. Brunink et al., EFFECTS OF ANIONIC SITES ON THE SELECTIVITY OF SODIUM-SENSITIVE CHEMFETS, Sensors and actuators. B, Chemical, 15(1-3), 1993, pp. 195-198
Citations number
18
Categorie Soggetti
Engineering, Eletrical & Electronic","Instument & Instrumentation
Journal title
Sensors and actuators. B, Chemical → ACNP
ISSN journal
09254005
Volume
15
Issue
1-3
Year of publication
1993
Pages
195 - 198
Database
ISI
SICI code
0925-4005(1993)15:1-3<195:EOASOT>2.0.ZU;2-W
Abstract
Calix[4]arene amides incorporated in poly(vinyl chloride) membranes pr ovide good Na+ selectivity for CHEMFETs. A remarkable difference in th e Na+/Ca2+ selectivity was observed depending on the presence or absen ce of tetraphenylborate ions in the membrane matrix. In the latter cas e the potentiometric selectivity coefficient (log K(Na,Ca)Pot) increas ed from -2.1 to -3.6. Calix[4]arene amides proved to be excellent iono phores to obtain Na+ selectivity in the presence of K+, i.e. log K(Na, K)Pot = -2.7.