NEW POTASSIUM-SELECTIVE ELECTRODE BASED ON AN IONOPHORIC BIS(15-CROWN-5 ETHER) DERIVED FROM XANTHENE-4,5-DICARBOXYLIC ACID

Authors
CHUNG TD CHANG SK PARK J KIM H
Citation
Td. Chung et al., NEW POTASSIUM-SELECTIVE ELECTRODE BASED ON AN IONOPHORIC BIS(15-CROWN-5 ETHER) DERIVED FROM XANTHENE-4,5-DICARBOXYLIC ACID, Analytical sciences, 13, 1997, pp. 325-328
Citations number
10
Journal title
Analytical sciences → ACNP
ISSN journal
09106340
Volume
13
Year of publication
1997
Supplement
S
Pages
325 - 328
Database
ISI
SICI code
0910-6340(1997)13:<325:NPEBOA>2.0.ZU;2-O
Abstract
Bis(15-crown-5 ether) derivatized from a xanthene-4,5-dicarboxylic aci d skeleton was studied as an ionophore for a new K+-selective electrod e. The polymeric liquid membrane based on this ionophore exhibits Nern stian behavior and optimization of experimental conditions for potenti ometric analysis offers a wide linear dynamic range, reasonable detect ion limit, good durability and hysteresis within a limited error. Due to the well-preorganized structure, the selectivity over Na+ is compar able to those of commercialized K+-selective ionophores and the interf erences by some cations such as Rb+ and Cs+ are reduced. Except slight ly slow response, the enhanced recognition ability is reminiscent of t he natural antibiotic valinomycin.