PMID: 15352505Sep 9, 2004Paper

Neutral-carrier-type potassium ion-selective electrodes based on polymer-supported liquid-crystal membranes for practical use

Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry
Syusuke OosakiK Kimura

Abstract

Polymer-supported liquid-crystal membranes have been designed for neutral-carrier-type potassium ion-selective electrodes, aiming for practical applications of high-performance liquid-crystalline membrane ion sensors. Two types of polymer-supported liquid-crystal membranes were tested for their usefulness; one is microporous poly(tetra fluoroethylene) (PTFE) membranes impregnated by thermotropic liquid-crystalline compounds, and another is poly(methyl methacrylate) (PMMA) membrane dispersing the same liquid-crystalline compounds. Both of the polymer-supported liquid-crystal membranes containing a liquid-crystalline benzo-15-crown-5 neutral carrier as well as a lipophilic anion excluder work well as ion-sensing membranes for potassium ion-selective electrodes, the ion selectivities of which can be switched by the measurement temperatures. Specifically, PTFE-impregnated liquid-crystal membranes are better than the PMMA-dispersed ones in the sensitivity and selectivity of the resulting ion electrodes. A potassium ion assay in blood sera has proved that neutral-carrier-type ion-selective electrodes based on the polymer-supported liquid-crystal membranes are reliable for practical uses.

Citations

Oct 18, 2005·Chemical Communications : Chem Comm·Syusuke OosakiKeiichi Kimura
Oct 14, 2006·Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry·Sudeshna ChandraHeinrich Lang
Aug 11, 2007·Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry·Shusuke OosakiKeiichi Kimura
Jan 15, 2008·Chemical Reviews·Johan BobackaAndrzej Lewenstam

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