Author/Authors :
Mikio Ouchi، نويسنده , , Yasuhiko Shibutani، نويسنده , , Kenji Yakabe، نويسنده , , Toshiyuki Shono، نويسنده , , Hiroshi Shintani، نويسنده , , Akio Yoneda، نويسنده , , Tadao Hakushi، نويسنده , , Edwin Weber، نويسنده ,
Abstract :
Dibenzo-16-crown-4 (1) indicates high silver and thallium(I) ion selectivity over sodium, potassium, and rubidium ion evaluated from the solvent extraction of metal picrates, while its cation-binding ability is lower than those of dibenzo-18-crown-6 (2) and dibenzo-22-crown-6 (3). Taking account of the highest thallium(I) ion selectivity for 1 obtained from extraction experiments, PVC membrane thallium(I)-selective electrodes based on 1 are prepared. The electrode shows the best potentiometric selectivity coefficients for thallium(I) over potassium and rubidium than those of 2 and 3, and commercially available bis(crown ether)s (4).
