Lithium Ion-Selective Electrodes Based on 1,10-Phenanthroline Derivatives

Hideki SUGIHARA, Tatsuhiro OKADA, Kazuhisa HIRATANI
1993 Analytical Sciences  
The preparation of 1,10-phenanthroline derivatives and 4,7-diphenyl-1,10-phenanthroline derivatives as neutral carriers for ion-selective electrodes and the properties of the title electrodes are described in detail. A log Ki°ivavalue of-3.l was obtained for a Li+-selective PVC membrane electrode based on 2,9-dibutyl-1,10-phenanthroline. This value is superior to those reported so far. The electrodes also showed excellent selectivity coefficients for Li+ relative to K+, Mgt, and Cart The
more » ... of substituents at the 2-and 9-positions of the carriers on the selectivity are discussed.
doi:10.2116/analsci.9.593 fatcat:ibdw25mkq5eznf4evfh2ttqx6q