| Autor: |
Masuda, Yoshitaka, Yakabe, Kenji, Shibutani, Yasuhiko, Shono, Toshiyuki |
| Zdroj: |
Analytical Sciences; June 1994, Vol. 10 Issue: 3 p491-495, 5p |
| Abstrakt: |
Thallium ion-selective electrodes based on PVC and five kinds of thiaethers are described. Although a PVC membrane electrode containing 5.1 w/w% 1,4,8,11-tetrathiacyclotetradecane (TTCT) plasticized by DOP (61.5 w/w%) showed good performance for Tl+sensitivity, potassium ion did not interfer. However, electrode containing other macrocyclic thiaethers do not show a Nernstian response to thallium activity. The size of the macrocyclic ring and a hydrophilic group introduced into the macrocyclic thiaether influenced the Nernstian slope as well as the linear activity range of the emf response. The additive effect of a lipophilic salt, potassium tetrakis(p-chlorophenyl)borate (KTpClPB), in the membrane with respect to Tl+selectivity was also observed. |
| Databáze: |
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